Thank you again for all your work. Carbon dioxide turns lime water milky. These questions and answers have been specially curated by subject experts. Answer: Question 3. Measurement is an integral part of modern science as well as of engineering, commerce, and daily life. Look at the figure which shows solutions taken in test tubes A, B, C and D. What colour is expected, when a piece of red litmus paper is dropped in each test tube? Ive made these before and theyre fantastic. 7.When you clean a metal vessel with tamarind the reaction taking place is: Metaloxide+X-------- Salt+Water. Neutralisation reaction. Identify A, B and C. When electricity is passed through a common salt solution, sodium. So if youre using actual gelatin, even land o lakes it wont turn out the same. Im making a batch for us this week too and already cant wait! As a result, it is soft. Why? Ive made this twice and used Knox Orinal Gelatine. Neutral salts e.g. acid : Those substances which give hydrogen ions (H+) or hydronium ions (H3 O+) on dissoClation in aqueous solution are called acids, e.g. HI, just wanted to ask if these freeze? Golu added 2 drops of solution C but could not get any change in colour. Why? Love your reply! 8. (ii) How do metal carbonates and metal hydrogencarbonates react with acids ? I like my lemon bars gooey. Also list two uses of Na2CO3.10H2O. (c) Curd, milk of magnesia Or omit the xanthan gum and keep the gelatin the same. Phenolphthalein is a synthetic (man-made) indicator. Name the reaction when an acid is mixed with base. I ate the whole batch this week. Thank you so much for this recipe. Answer: Solution B will be basic in nature as its pH value is 8. Sodium chloride formed in this reaction remains in solution form. The recipe clearly calls for 1 TEASPOON of unflavored gelatin (I also use the Knox brand) and not a little less than 1 Tablespoon which is almost 3 times the required amount. Worked perfectly. A NaHOCO3; B Na2CO3; C CO2 gas. In acidic solution, methyl orange gives red colour but in basic solution it gives yellow colour. Being a strong base, sodium hydroxide is fully ionised and gives a large amount of hydroxide ions (OH). Paheli is suffering from indigestion due to acidity. When the soil is too basic, plants do not grow well in it. Answer: Question 4. Ho. Banana. Sodium carbonate is a salt of weak acid H2CO3 and strong base NaOH, so it is basic. Solution B gives red colour when a drop of methyl orange is added to it. Answer: A farmer was unhappy because of his low crop yield. This is because below this pH value, the medium of the mouth becomes more acidic due to which tooth enamel corrodes at a faster rate. I have a fine grater/zester but it really doesnt seem to work. 3.Name the salt formed in the above reaction. One day Rahuls mother after taking meal felt pain and irritation in her stomach. With the help of a chemical equation, explain how a soda-acid fire extinguisher helps in putting out a fire. (2) pH in Our Digestive System : HCl present in the stomach helps is the digestion of food. Thats more than I usually eat a DAY. I will definitely make again, but just use less lemon. Question 9. Which of the following is treated with chlorine to obtain bleaching powder. It just needs to be fine enough to strain out any larger chunks of lemon zest or any lumps that might have formed while making the curd! In dentistry, it is used for making casts. Maybe weekly. (c)-(iv) What actually happened? Ans- The metal oxide (MO) is of basic in nature. (iii) Sodium chloride is a salt of strong acid HCl and strong base NaOH, so it is neutral.. Answer: Measurement is often considered a hallmark of the scientific enterprise and a privileged source of knowledge relative to qualitative modes of inquiry. First of all you said 1/4 cup lemon zest and I wondered if that was the correct amount. (c) Niteshs friends are caring , supportive and helpful. (a) In place of zinc granules, same amount of zinc dust is taken in the test tube. Hope to hear back soon! Ans- When fresh milk changes to curd, the pH of the solution is likely to decrease. Assertion(A): Weak acids have low electrical conductivity. I havent tried the recipe yet but wanted to respond that I see chefs on the food channels using a little kitchen torch to brown meringue all the time, then you wouldnt need to double bake I had to grab a couple pieces quickly to save them for myself for later as they were going fast. Thanks! Which bases are called alkalies? My family and I love them! On mixing with water, plaster of Paris changes to gypsum once again leaving a hard solid mass. Suggestions? One packet of Knox gelatin worked great for me with the xanthan gum. Write its chemical name and formula. Did u try it without the gum? (d) Curd, vinegar, Question 9. I dont know how you do it, but these recipes are incredible. How is it recognised ? So happy to hear it Jessica! When CO2 gas is passed through lime water it forms calcium carbonate (CaCO3), which is slightly soluble in water making it milky. I am not a huge fan of almond. Rest of all options are correct. And the crust is amazing! Question 5. (b) Almost same amount of gas is evolved. Although I dont nor can I have collagen, is there something I can use instead? I noticed my filling wasnt getting thick when I added the yolks.. Be patient I promise its worth it! My lemons must have been very strong, because, goodness! (ii) Our stomach and intestines work in a specific pH range. (a) Define a universal indicator. 12. A milkman adds a very small amount of baking soda to fresh milk. Answer: Solution B. SORRY! Answer: Its chemical formula is CaSO4.\(\frac{1}{2}\) H2O. Explain why. (c) Name one salt whose solution has pH more than 7 and one salt whose solution has pH less than 7. Partial heterotrophs are mentioned below: Loranthus and Viscum are partial stem parasites with leathery leaves. Ummmthese are AMAZING!! Question 1. Can I use a powdered form of Swerve instead or is there another reason for using granular? (Acid) I used a monk fruit erythritol blend for the crust & filling sweetener. Question 22. Thank you for updating the gelatin/collagen ingredient quantity, that caught me the first time I made this and it came out extremely stiff and gummy like. (d) Baking soda Use: Plaster of Paris is used in hospitals for setting fractured bones in the right position to ensure correct healing. Identify A, B and Answer: The reaction is called auto oxidation. This is due to the fact that it reacts with the acid present in lemon to form a salt which is washed away with water. (My comment above should have been in the main comments, not just as a reply). Answer: Let us know if you do and how they turn out if so! (b) Instead of dilute sulphuric acid, dilute hydrochloric acid is taken. The reaction is as follows: Sometimes, indigestion is painful and some mild base should be taken to relief from this pain. On rubbing lemon on the vessel, the surface is cleaned, and the vessel begins to shine again. They turn blue litmus paper/solution to red. Why aqueous ammonia solution considered a base although ammonia does not contain hydroxyl (OH-) ion ? I have all these ingredients on hand except for the xanthan gum. I had to add a bunch of yellow food coloring to it and they still turned out an unattractive yellow-green color. Not horrible, just not nearly as good as with the zest! Question 13. Can you tell me how you calculated this? We can get solid sodium chloride by evaporation method. Im just north of you in Dutchess County, and the view out of my window is still as arctic as yours. (b) Name one indicator which turns red on adding a base. Thats the pith and its super bitter you just want the bright yellow rind, which is where the oils and therefore flavor are. How much in total? (iii) How is toothpaste effective in such an incident? Top notes are Lemon, Cedar and Citron; middle notes are Water Hyacinth, Pink Pepper and Jasmine; base notes are Patchouli, White Musk, Vetiver, Teak Wood, iris and Amber. Thanks Mellissa. Any ideas for a butter substitution? It is turning yellow due to polluted air. It has values ranging from 0 (very acidic) to 14 (very alkaline). Illustrate any three chemical properties of acids. :). These rock! Answer: . Question 12. A small amount of hydrochloric acid produced in the stomach is useful as it can kill the harmful bacteria that may enter into the stomach along with the food. Mohan and Priyanka were playing in the garden. When it changes into curd (yoghurt), will its pH value increase or decrease? A doctor applied surgical bandages on the fractured bones of a patient after making it wet. I used Knox gelatin, so maybe that was why, but the top was rubbery. Especially on the second day. Students should refer to these questions along with the. Hi! Among the foods in which benzoic acid occurs naturally are cranberries, prunes, plums, cinnamon, ripe cloves, and most berries. Its strictly a matter of personal preference and if you dont mind the texture of the zest in there, it wont hurt anything to skip that straining step. Excess of acid in the stomach causes indigestion. Suggest a method (if any). Immediately, his friends call his mother. The third series of the Australian cooking game show MasterChef Australia premiered on Sunday, 1 May 2011 at 7:30 pm on Network Ten.Judges George Calombaris, Gary Mehigan and Matt Preston returned from the previous series and were joined by Matt Moran. (i) Identify the acidic and basic solution. A compound if acidic will turn all indicators red. Hence, your answer will be option [D]. Write two uses of Plaster of Paris. When this compound is left in open for some time, it becomes a solid mass and cannot be used for moulding purposes. Seriously delicious. I am so happy about this. Thanks so much for the recipe!! How much coconut flour did you use? Doing the calculations for the crust ALONE with 1/3 cup swerve and 16 servings, it is WAY over 2g carbs. The salt of a weak acid and a strong base gives a basic solution. pH Scale : It is a scale used for measuring hydrogen ion concentration. What do you use to strain the filling? I finally decided though that it was high time I came up with a legit keto lemon bar recipe that would meet my low carb and gluten free criteria (and save me from the morning after bloating.). We modify our NCERT Textbooks Solutions and other study materials as per your suggestion. (ii) All metal carbonaes and hydrogencarbonates react with acids to form a corresponding salt, carbon dioxide and water. Welcome, back, Melissa :) These look great. Hi Peggy! i always use Swerve, i dont know how you do it that never never crystallized, so lucky!! Name three acids used in the laboratory. Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved. Therefore, the medium becomes more acidic and its pH decreases. Actually, lactose present in milk gets converted to lactic acid when curd is formed from milk. WB TET 2022 Exam Analysis (11th December): Check Overall Good Attempts, Difficulty Level, Section-wise Topics Asked. 2. natural Enough said. What a great treat when low carbing can be tedious. Fresh milk has a pH of 6. The crust will firm up when cooled for sure. In the following list of acids, separate strong acids from weak acids; Hydrochloric acid, Cltric acid, acetic acid, nitric acid, formic acid, sulphuric acid. Thank you for the recipe I adore lemon desserts! Marie, Answer: Is this the nature of baking with Swerve? (a) Which information given by Rahuls teacher that helped him to select the baking soda as remedy? 7. Question 5. Question 10. What is the commerClal name of calcium sulphate hemihydrate ? The correct way of making a solution of acid in water is to [NCERT Exemplar] As world population increases, lactic acid fermentation is expected to become an important role in preserving fresh vegetables, fruits, and other food items for feeding humanity in developing countries. I sifted the almond flour and sweetener, then I added a little unsweetened coconut for the crust. Even my non keto friends loved them. One commenter said these taste like the real thing, and they totally do! Question 14. Answer: Give reason for your answer. Who is Sukhvinder Singh Sukhu? I find that my microplane grater works the best some zesters are too small and they just grind it into mush making it hard to use. Pass the gas produced in each case through lime water as shown in the figure. (iii) Baking soda Chance Eau Fraiche by Chanel is a Chypre Floral fragrance for women.Chance Eau Fraiche was launched in 2007. The butter, sugar and bananas are cooked, and then alcohol is added and ignited. Thank you in advance! I LOVE this recipe yet would add a disclaimer- Collagen gives off a very unsavory aroma while baking, which lingered after bars were out of the oven. Im in trouble. Plaster of Paris (calcium sulphate hemihydrate). Thank you so much!! Its just collagen. (d) a salt and a base When cooking the lemon curd for these keto lemon bars, DO NOT LEAVE THE POT UNATTENDED. Mellissa, its high time I commented on your wonderful recipes. Give its any one use. Y will turn phenolphthalein from colourless to pink because it is basic in nature having pH value. Just wondering though why do we drain the zest out, thought it might be nice to be in the filling? (d) 6.0 7.0. It turns red litmus paper to blue. I just want to say thankyou so much I won the contest so excited . The third series was won by Kate Bracks who defeated Michael Weldon in the grand finale on 7 August 2011. Answer: Next time Ill back off on the zest, and increase the sweetener, but they were amazingly good. , For any feedback or complaint, email to: compliant_gro@jagrannewmedia.com, This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations. Soil B is too acidic. Chemical name : calcium oxychloride You can use the gelatin but only 1/3 of the called for amount should do the trick! Mention its one use. X will turn blue litmus to red because it is acidic in nature having pH value less than 7. Example: The flavours of curd, lemon juice, orange juice, and vinegar are all sour. Ive never baked with unflavored gelatin. -these were tart! :). Answer: Gluten free & keto. Answer: This is because, being a base, baking soda neutralises the acidic liquid injected by bee sting and cancels its effect. (b) Yellow in acid and red in base, Question 4. Hydrochloric acid + Sodium hydroxide + Water *** at least 15 carbs a serving! This one is awesome! Most lemon bars, lemon pies, etc., never actually have enough lemon in them for me. That bottled stuff just wont taste the same. If you brush your teeth in an acidic environment, you can cause enamel erosion.They can help mitigate the bad effects of sugary or acidic beverages that can wear down your enamel since they ensure that beverages make less contact with your teeth. 1 M HCl has a higher concentration of H+ ions because it is a stronger acid than CH3COOH. It is AMAZING and so worth the time. Thank you so much for this recipe. Ok, these did not work for me. Best baking Keto recipe so far! Hence, the Na2 CO3 solution is basic in nature. I am an avid baker, cook most meals from scratch and have been struggling to find a good low carb dessert. There are more than 75 MCQ are given below covering the entire chapter 5 of class 7 science NCERT Book. Question 6. I dont use gums in my kitchen and I dont see the need for it. Sodium hydroxide turns phenolphthalein solution, 9.Sodium carbonate is a basic salt because it is a salt of a, DIRECTION: Each of these questions contains an Assertion followed by Reason. How can it be prevented? Thus, pH is a number which indicates the acidic or basic nature of a solution. Nitesh was playing with his friends in the garden. We cut them in 32 pieces. As an added bonus these keto lemon bars are pretty easy to make, and just as good or better than the real thing. Question 16. When same concentration of HCl and acetic acid are taken then these two produce different amounts of hydrogen ions. The three test tubes contain distilled water, an acidic solution and the basic solution, respectively. What is its nature? Copyright 2022, I Breathe I'm Hungry. *** Keto of course. Which acid is injected into our body by an ant sting that causes pain? NaHCO3(s) + HCl (aq) NaCl (aq) + H2O(l) + CO2(g). (b) Upon dilution, more of acid dissociates into ions Therefore concentration of hydrogen ion increases. 8 lemons should have given you more than enough zest were you using a micro plane grater made for zest ink, or something else? Strong acids-Hydrochloric acid, sulphuric acid, nitric acid. 2. Q.2. 2. (a) an acid and a base This is due to the fact that soap solution is basic in nature which changes the colour of turmeric in the curry stain to red-brown. Question 15. Reply. Hence, baking soda is the appropriate remedy as it is basic in nature and neutralises the acid. 4. I feel like a scientist trying to use this technique in other recipes but it works. Which solution will be basic in nature? Answer: Why does tooth decay start when the pH of mouth is lower than 5.5 ? Recipe was great, the only problem I ran into was my crust didnt seem to cook. . It is MUCH appreciated. This was my experience. Lemon water is basic in nature. Importance in everyday life : (1) Plants and Animals are pH sensitive : Living or ganisms can survive only in a narrow range of pH change, our body works normally within a pH range of 7 to 7.8. Theyre not cool yet and I put them in the fridge before cutting any further. How were they calculated here? (a) Study the following chemical equation: Name the gas which is usually produced when dil. (c) Slaked lime It turns red litmus blue. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywall. I do notice a bit of that cooling sensation, which does hinder things a bit for me. I work for a huge Childrens Hospital with over a thousand employees and every so often our unit will have a bakesale to benefit the Childrens Miracle Network. The hydroxyl ions produced in the solution are responsible for basic character of ammonia. Usually due to wrong harvesting or excessive use of fertilizers the pH balance of the soil may increase or decrease. Can I use any substitute for the xanthan gum? When an acidic solution is mixed with a basic solution, they each other forming and water. Is it possible to substitute a GF All Purpose Baking Flour for the Almond Flour? What will happen to the nature of the solution ? In the meantime, do you have handy the rest of the nutrition info, like grams of fiber and micronutrients (sodium, potassium, calcium, etc.)? Name one acid which is responsible for acid rain. Products of a neutralisation reaction are always (b) NaHCO3 is sparingly soluble or less soluble in water and gets separated as a precipitate while NH4Cl remains in solution. e.g.- NaOH. Keto is much easier with these tasty little numbers!! I hoped that might help them incorporate into the filling a little better. Failed on my part. Answer: I loved all that real lemon! Sounds delish!! Some salt is called rock salt which was formed when seas of bygone ages dried up. I made half the recipe in a standard loaf pan (2 lb size). Here, all the statements are correct. Her mother immediately observed the affected area and applied a thin coating of toothpaste as first aid, then took her to the nearest doctor. Question 4. Just wondered if you think it would work with lime or key lime instead? NCERT Solutions for Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Physical Education, NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Physical Education, NCERT Solutions for Class 12 Political Science, Tutors and teachers: How to successfully deliver online lessons, How to Avoid Plagiarism in Research Papers, How Quarantine is Disrupting the Teenage Experience. Cant handle this autocorrect :). (c) If sodium hydroxide is taken, hydrogen gas will be evolved. Are there any substitutes? I tried doing low carb without having any type of low carb treats, and crashed hard after 3 weeks. Strong bases: Strong bases completely ionise in water, resulting in a huge amount of OH ions. Ans- The acidic character of the solution will further increases. Use: It is used in glass, soap and paper industries. The hand should be washed immediately with plenty of water and a paste of sodium hydrogen carbonate (a base) must be applied to neutralise the acid. Ans: X is chlorine Y is CaOCl2 (calcium oxychloride) used as bleaching agent. To think I just made a whole batch myself! (ii) What is the effect of temperature on plaster of Paris? Take two test tubes. The dry HCl does not change the colour of dry litmus paper as it needs moisture or water for its acidic action. Stomach acts in slightly acidic medium while small intestine digests the food in slightly alkaline medium. :). Id love to make this recipe I have xanthum gum but dont have the collagen. NH3 + H2O NH3+ + OH Baking powder (NaHCO3), salt A is commonly used in bakery products. ?. Thanks so much!!!! Thank you!!! All Day I Dream of Food creator Carolyn has a recipe for caramel sauce using Bocca Sweet that does not cool with grit. I used Great Lakes Gelatin which may act differently than the powdered gelatin in the box so if you got a rubbery texture then definitely use less next time! Or maybe if the cookie layer baked too much they didnt bond together after you added the lemon curd. Stir the solution and keep it for sometime. Also I think the curd should have been left as is without the gelatin and xantham gum. When litmus is added to a basic solution it turns blue. Hubby asked for lemon bars and this delivered. I was eager to make these, but I didnt have xanthan gum, so I substituted chia seeds. Can you use the green can gelatin or do you need the red can kind? Answer: Washing soda is produced by Solvay process, by the reaction of ammonical brine with CO2 gas. It is because of the products formed : chlor for chlorine and alkali for sodium hydroxide. Name the hardest substance in the body. (2014) Weak bases: Weak bases partially ionise in water, resulting in a tiny number of OH ions. Try it in enamel or a coated nonstick pan next time and you should get the bright yellow natural color with no need for food coloring! Lime water in each case will turn milky due to the production of CO2 gas in each of the test tubes. Just made these with farm fresh egg yolks and fresh lemon juice. Answer: (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. Hence, oxides of non-metals are acidic in nature. I also added a layer of cranberry puree that I made sugar free. This recipe is perfection! Hoping to make this for our teams holiday event! Sodium bicarbonate neutralises the acidity in the stomach. Im enjoying a piece with my tea right now. Carbonic acid is a weak acid which is only slightly ionised and hence, gives a small amount of hydrogen ions (H+). I may have forgot to strain. Baked it 10 min and it still seemed wrong but I just kept going. Answer: I didnt event strain it because I wasnt sure what I was supposed to be straining! [Value Based Question] In the end I ended up with 2 inches of what was basically flour under my custard. When it changes into curd (yogurt), will its pH value increase or decrease ? I wanted to know am I using unsalted butter or salted? (d) Calamine solution It came out amazing! Question 8. Thank you so much for such a fantastic recipe, Ill probably be making this once a week!! I used powdered monkfruit instead of granular and added more sweetner so it wasnt too tart. (i) On heating sodium hydrogencarbonate (NaHCO3), it decomposes to form sodium carbonate (Na2.CO3), water (H2O) and carbon dioxide (CO2). How sweet of you! A white chemical compound becomes hard on mixing proper quantity of water. Bleaching powder (CalCl2) is prepared by action of chlorine on dry slaked lime. I have one but I seem to get just goo. 2.The nature of copper oxide is. Hope they are a hit at work too! CBSE Class 10 Chemistry Chapter 2 Important Questions and Answers: In this article, we are going to discuss the Important questions of CBSE Class 10 Chemistry Chapter 2 Acids, Bases and Salts. Keep them in the fridge for up to a week, the freezer for a couple of months I would think! to know what all topics need to be covered. , Thanks so much for this recipe! I also would prefer a more intense lemon flavor. The evolved gas was passed through lime water. 2. Organic matter (called manure or compost) releases acids which neutralize the excess bases present in the soil and reduce its basic nature. Question 1. I tried out this recipe and it was a huge hit! Delish! They are the thing Im most likely to gaze longingly at through the glass at a bakery or coffee house and sometimes I give in and have one. Its chemical Acids turn blue litmus paper red while bases turn red litmus paper blue. 5. indicator The almond flour alone came out to 64 net carbs. I used the boxed plain gelatin, and after reading a comment about them turning out rubbery, I used only 1 Tbsp instead of 2~turned out perfect!!!! It is the second chapter in Unit I Chemical Substances - Nature and Behaviour. (a) pdd water to acid Answer: The water molecules, which form part of the structure of a crystal, are called water of crystallization. (c) neutral Chemical name of Plaster of Paris is calcium sulphate hemihydrate and its formula is CaSO4. 1/4 H2O. Question 6. It helps us to digest food but too much of acid in the stomach causes indigestion. OkayIm not sure what happened but when I printed this recipe, a while backit called for 4 cups of the flour and comparing to recipe above, looks like it doubled all the rest of the ingredients but still called for 8 x 8 square panand to bake for 15 minutes!! Answer: Question 8. Remove from the heat and strain into a small bowl. Indicator phenolphthalein gives pink colour with lime water because lime water is a base. Ive never used almond or coconut flour before, but Im thinking theyre not interchangeable. (a) Formic acid (b) Acetic acid (c) Citric acid (d) Hydrochloric acid, a) acidic b) basic c) neutral d) amphoteric, 3.Name the salt formed in the above reaction, 4.The phenomenon of copper getting tarnished is, a) corrosion b) rancidity c) displacement d)none of these. Lemon bars have always been one of my absolute favorite desserts. Take a drop of the dilute solution of the substance on the tips of your tongue. Just wonderig how important is the xanthan gum? Question 15. You could probably reduce it to 1 Tbsp if youre using regular gelatin! Hence, it is used during indigestion. Sodium hydroxide (NaOH) With the xanthan gum and gelatin, it still set up just fine. (c) Turmeric, Fill in the Blanks Turmeric is a natural indicator which gives reddish tinge in bases iv. The Central Board of Secondary Education has not yet announced a date for the release of their date sheet for CBSE Class 10 board examination 2023. Hence, your answer should be option [D]. YOU ARE INCORRECT. Check your app. Easy Keto Recipes, Meal plans and Menu Plans, Low Carb, Paleo, & Gluten Free Recipes, Created By: Mellissa |Updated: September 12, 2022| 261 Comments. (b) Yellow in acid and red in base A gas X reacts with lime water and forms a compound Y which is used as a bleaching agent in the chemical industry. I have Bobs Red Mill in the pantry, and would prefer to use ingredients on hand rather than buying more if possible. (b) Write the balanced chemical equation of Chlor-alkali process. It turned out pretty good but how long did you cook the custard/curd before taking it off the heat? Answer: What will you observe when you put What remedy would you suggest the farmer to neutralise the soil? Natural indicator like turmeric can also be used. The whole family loved it. Answer: [NCERT Exemplar; HOTS] Consider the following statements and choose the incorrect one: Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Thank you so much again Melissa. YUMMY!!!! I could eat it by itself. (b) Which plant can grow in the most acidic soil ? The oxide of a metal M was water soluble. These are incredible and satisfy my sweet tooth! Federal government websites always use a .gov or .mil domain. Maybe YOU should start charging a fortune for them to your other keto friends now that youre a pro baker! Thank you for the healthy alternative to this classic! Since HCl gas gives H+ ions only with H2O molecules to behave as an acid. During indigestion the stomach produces too much acid, it couses pain and irritation. Answer: Phenolphthalein gives colour with lime water. reminded me of when cornstarch makes lumpy gravy. They were light, tangy and felt like a great Spring treat! DOWNLOAD CBSE CLASS 10 SCIENCE CHAPTER 2 IMPORTANT QUESTIONS AND ANSWERS IN PDF, CBSE Class 10 Chemistry Chapter 1 Important Questions and Answers for 2023, CBSE Class 10 Chemistry Chapter 3 Important Questions and Answers for 2023, CBSE Class 10 Chemistry Chapter 4 Important Questions and Answers for 2023, CBSE Class 10 Social Science Syllabus 2022-2023: Download Class 10th Social Science Syllabus PDF, CBSE Class 10 Science Syllabus 2022-23: Download class 10th Syllabus PDF, CBSE Class 10 Maths Syllabus 2022-23: Download Class 10th Maths Syllabus PDF, CBSE Class 12th Date Sheet for Term 2 Exam 2022 (PDF): Science, Commerce, Arts, CBSE Board Exam 2023: Date sheet to be released in December 2022, Get Details Here, CBSE Exam Date 2023 Released: Check Class 10 and 12 Datesheet Here. For example, Zn (s) + H2SO4 (aq) ZnSO4 (aq) + H2 (Hydrogen gas). Therefore, if we touch the test tube immediately after the neutralisation reaction, it is found to be hot. I made these bars and they turned out amazing thanks for sharing! (a) The term information panel as it applies to packaged food means that part of the label immediately contiguous and to the right of the principal display panel as observed by an individual facing the principal display panel with the following exceptions: (1) If the part of the label immediately contiguous and to the right of the principal display panel is too small to When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil. Ans. It reacts with undigested food and suffers it. What is meant by water of crystallisation ? (b) Quicklime Question 1. These were a huge hit! Is lime water an acidic or basic solution? (c) a few drops of phenolphthalein solution to each test tube? I didnt use enough collagen, but still great texture. I wondered if I could make a meringue with egg whites? Which of the following is an acid-base indicator? Whisk in the the xanthan gum and collagen or gelatin until dissolved and smooth. It is used as a cleansing agent for domestic purposes. Arrange the following in the increasing order of acidic strength. Omg they are the bomb. Reason (R) :On strong heating , Copper sulphate crystals lose all the water of crystallisation and form anhydrous salt. Answer: This is, by far, the best dessert Ive made following s Ketogenic diet. of Great Lakes gelatin. (ii) Zinc granules Truly the best lemon bars & so easy. It turns red litmus blue. Your email address will not be published. Thanks Linda, Ive never tried these with vanilla but Im intrigued! Im also lactose intolerant, so theres no lactose in ghee. And tartaric acid is present in tamarind. lol This recipe is everything I want and needed. Answer: I never ever comment on recipes but I just had to for this one. Answer: This may take 10 12 minutes, and it will feel like its never going to happen and then WHAM its there and it seems to be instantaneous. Identify X and Y. (iii) Tooth decay starts when the pH of the mouth is lower than 5.5. [HOTS] Identify the sulphate salt and state why does it show such a behaviour. When it is left open for some time, it absorbs moisture from the atmosphere and forms gypsum, which is a hard solid mass. Thats so awesome to hear Austin, thank you! So when water is added to anhydrous copper sulphate, it gets hydrated and turns blue due to the formation of hydrated copper sulphate. Write the equation of the reaction which takes place. Question 28. Thank you so much. (b) Both A and R are true and R is not the correct explanation of A. When an acid solution is diluted with water then concentration of (H3O+) ions gets decreased. Personally I dont need it. (a) (i) Living organisms can survive only in a narrow range of pH change. Help him. (a) Rahul knows that our stomach contains hydrochloric acid. 2.4.What is the nature of the substance A? As an example, to understand: methyl orange and phenolphthalein used as indicator. The more lemon zest, the more intense the lemon flavor. 3. No purchase necessary, must be 18 years or older and a resident of US or Canada. 11. Question 9. Planning to have this for my daughter. True/False (2015) The solution is: Boojho is writing some statements about indicators. When a cold and concentrated solution of sodium chloride reacts with ammonia and carbon dioxide, sodium hydrogencarbonate (baking soda) and ammonium chloride is formed. When an acidic solution is mixed with a basic solution, they neutralize each other, forming salt and water. This post may contain affiliate links which wont change your price but will share some commission. Would these work if I replaced butter with ghee? How lime water is prepared in the laboratory? This keto lemon bar recipe is basically the love child of my Lemon Almond Shortbread Cookies (crust), and my Sugar Free Lemon Curd (filling) recipes, with a few minor tweaks. Hi Mellissa, quick question, do I dissolve the gelatin like you would normally or do I just add the granules? Im not sure if I didnt bake them long enough, as the lemon curd part stayed somewhat soupy, butno matter! I saw Milk Street last night and they made some cookies with almond flour and they suggested toasting the almond flour for some cookies they were making to add depth. Hi Mellissa! Bananas Foster. Answer: You have to select the one. (a) Water soluble bases are called alkalis, e.g., NaOH, KOH. CaCO3 + 2HNO3 Ca(NO3)2 + H2O + CO2. (a) basic, Question 8. We would like to show you a description here but the site wont allow us. What do you infer about the nature of non-metal Oxide? He discussed the problem with an agricultural scientist realised that the soil of his field was either too acidic or two basics. Question 24. This is a perfect snack to eat for breakfast or as dessert. Answer: Answer: Question 5. (a) The reason for this burning pain is honeybee sting which causes pain and irritation. False, it is acidic in nature. I dont love the cooling sensation from erythritol either so Im looking for an alternative as well. (a) red and blue There is only red litmus paper available in order to identify what is there in each test tube. I never write reviews because if I do not like something, its probably because of me and not the recipe but these lemon bars are out of this world! Maybe more juice or leave in a small bit of zest would help with that. Answer: Name the reaction when an acid is mixed with base. 6. Will add a bit to my next batch, thanks for the idea! Q.3. What type of solutions are A and B and which one of the solutions A and B will have a higher pH value? So, when an acid is mixed with a base, they neutralise (or cancel) the effect of each other. (a) Grapes, lime water Therefore, the students must begin preparing for their examinations. Question 9. NaOH (aq) \(\rightleftharpoons\) Na+ + OH Answer: Lime water (calcium hydroxide) is a basic solution. Find here, CGPSC Recruitment 2022: Notification Out For Civil Judge Post at psc.cg.gov.in, Check Eligibility, TS Result 2022 (SSC - Declared): Click here to Check, Odisha Board 10th Result 2022 (Declared): Click here to Check, Odisha board 12th Result 2022 (Commerce & Science - Declared): Click here to Check, Odisha board 12th Commerce and Arts Results 2022 (Arts - Declared): Click here to check. 4. Let us know how it goes if you do! Thus, A will have pH more than 7 because pH value of. in the Hudson Valley! It consists of flour, butter, sugar, eggs, milk, and baking soda in its basic variety. Lee. As a result of the EUs General Data Protection Regulation (GDPR). Base : Those substances which give hydroxide ions (OH) on dissoClation or ionisation in aqueous solution are called bases, e.g. Answers: Eggshells contain calcium carbonate. http://www.sugarfreemom.com/recipes/low-carb-coconut-flour-pie-crust/ If its really fine and packed down then 1 tablespoon will do it, but if youre using larger shreds youll need the 1/4 cup. It shows different colours at different concentrations of hydrogen ions in a solution. The evolved heat raises the temperature of the reaction mixture. Phenolphthalein indicator is synthetic (man-made), acid-base indicator. Citric acid in lemon juice and oxalic acid in tomato. pH > 7. (b) blue and red Question 16. (a) basic Which type of an indicator is onion juice? Since Y and Z are calcium salts, therefore X is also a calcium salt and is calcium carbonate : Regarding the lemon bars, its weird that the lemon part didnt bond to the crust. Turmeric and litmus are acid-base indicators. The excessive use of fertilizers in the fields also makes the soil too acidic. I used the powdered gelatin in the box. When applied on the fractured bones after making them wet , it changes into a hard mass called Gypsum. For every 1 cup of coconut flour, use 6 eggs and 1 cup of liquid. Question 4. Hi Caitlin for sure the almond and coconut flours are not interchangeable so I can see why you would have had trouble with the lemon bars recipe! What will be the action of the following substances on litmus paper ? Tech Guide: What is the new View Once Text feature of WhatsApp and how to use it? Im not an inexperienced baker, but the filling turned out so rubbery! View Answer; Q16 Which of the following sets of substances contains acids? Thank you for this recipe. (b) Potato (4.5 6.0) Id bet you didnt get net carbs on your almond flour. Sooo yum!! What will happen to the nature of the solution ? (Salt). On the tart side, but WOW! Milk of magnesia which contains magnesium hydroxide (base) is used to neutralise the effect of excessive acid in stomach. Thanks so much for sharing all your hard work and delicious recipes with us. (b) Turmeric. (a) If the wastes of a factory flow into waterbodies, it can cause a threat to the lives of sea creatures and to anybody who drink the water. Why does a turmeric stain on white shirt is turned to red when it is washed with soap? The formulae of the given salts and the acids and bases from which these salts may be obtained are given in the following table : Question 1. To test the presence of an acid in any substance, what methods can be used? Uhare these still low carb if you ate a third of the pan in one sitting??? A solution changes the colour of turmeric indicator from yellow to red. Because they contain acids, these compounds have a sour flavour. This indicator turns acidic solution to magenta (deep pink) and basic solution to green. Its pleasures are twofold: first, Tadashi Ono and Harris Salat have written a delightful cultural history of one of Japans premier foods; second, they have compiled fifty accessible recipes guaranteed to Its above freezing today so Im optimistic that the snow bank out front will be gone soon! When a blue litmus trip was dipped in this solution, it did not undergo any change in colour .Predict the nature of the oxide. Class 7 Science Chapter 5 MCQ tests are given below. Curry contains turmeric which acts as an acid-base indicator. (a) When a piece of marble (CaCO3) is dropped in dil HCl, CO2 gas will be evolved which turns lime water milky. Very strong lemon flavor and not too sweet. (i) as an antacid Extra Questions for Class 10 Science Chapter 2 Acids Bases and Salts with Answers Solutions. 4. 2NaCl (aq) + 2H2O (l) 2NaOH (aq) + Cl2(g) + H2 (g) Paheli observed that most of the fish in the pond of her village were gradually dying. just trying to figure out not to have that texture. My crust ended up about 2 inches thick and didnt hold together at all. When the soil is too acidic, it is treated with base such as quicklime (calcium oxide) or slaked lime (calcium hydroxide) which neutralize the excess acid present in the soil and reduces its acidic nature. These are now officially my favorite keto dessert! I think this might be the best keto dessert Ive ever made. Weak Bases NH4OH.Al(OH)3. (i) an acid and I made them to take to a party and they were a huge hit! Two solutions A and B have pH values of 5 and 8 respectively. Answer: Im allergic to nuts as well. Question 8. (a) Write the name given to bases that are highly soluble in water? Name the substance obtained by the action of chlorine on dry slaked lime. (ii) Washing soda is sodium carbonate decahydrate which when exposed to air loses 10 molecules of water and changes to white powder. Mine turned out perfect. True In addition to sodium hydrogencarbonate, baking powder contains a substance X. 1. sour, acids I have never used 1/4 CUP of zest in anything. Assertion(A): The aqueous solution of glucose and alcohol do not show acidic character. Question 7. Answer: Match the items in Column 1 with Column II. (c) Mint (7.0 8.0) In this page, you can find CBSE Class 10 Science Chapter 2 Extra Questions and Answers Acids Bases and Salts Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice complete. She applied baking soda solution on the affected area and then took him to the doctor. I dont think that will work the same as the almond flour Kristina but if you try it let us know! Wasp sting inject a liquid in the skin which is acidic in nature. Answer: Question 13. I would also make the curd a little sweeter. If someone is suffering from the problem of acidity after overeating; which of the following would you suggest as a remedy? How would you verify it? The mixture contains more of hydroxide ions than hydrogen ions, so it is basic in nature. Answer: The candidates appearing for CBSE Class 10 board examinations still have about three months. Thanks for the recipe! First, take three strips of blue litmus paper and dip one in each test tube. Answer: I baked the crust a little longer, until it was golden brown so it would be a little crispier and it turned out great! Hi Melissa, For delicious recipes, easy to follow meal plans, and valuable tips to help unleash your inner Keto chef! I dont eat keto and generally am not a fan of keto desserts, but I also thought these were pretty tasty. (i) Sodium bicarbonate from sodium chloride I am about to try this tomorrow have lots of lemons so can it be frozen? When milk changes into curd, its pH value will decrease because curd contains lactic acid (pH < 6 of acids). Anyone hesitating should try this recepie! I appreciate the guidance, and I will try the keto bars again as the lemon part is awesome it was just the crust that was off. Question 8. Question 5. (d) either neutral or acidic Unit I: Chemical Substances - Nature and Behaviour, 1.The colour of phenolphthalein in acidic medium is-. Question 18. Im paleo so cant use it x. These MCQ Quiz provides a complete practice of the chapter and help to score better in all exams. Also get a very fine almond flour like Wellbee or Honeyville for the best results in baked goods! Plants require a specific pH range for their healthy growth. For example, My husband was pining over lemon bars when we were shopping the other day so I surprised him today with these. Any cookie crust or sweet base layer will probably work so if you can find one that will work for her just top it with the filling and bake! My friend didnt believe me when I made this recipe for her and told her it is keto. Answer: Also give the common method to get relief from the discomfort caused by the ant sting. The reason for low crop yield in farmers field was that the soil at a place is either too acidic or too basic. Magnesium hydroxide (Mg(OH) 2) and But otherwise delish and perfect for spring. Do you have a nut-free adaptation? Wow! Q.6. Since current is carried by the movements of ions, a.q. (i) Sodium bicarbonate placed in a test tube. Delicious! (iii) Bleaching powder is used in water treatment plants for disinfecting drinking water to make it free of germs. The only thing I might try differently next time is using powdered sweetener in the filling; I used granulated Lakanto and it didnt end up dissolving completely. Mark them as A and B. name is calcium sulphate hemihydrate (CaSO4 \(\frac{1}{2}\)H2O). But it was so creamy and smooth and tart and AMAZING! While playing in a park, a child was stung by a wasp. All substances are either acidic or basic. Im also going to try the allulose and then well have to compare notes! Because the residue inhibits the ability of skin to return to its slightly acidic pH, irritation may occur. You could try a blend like lakanto which has monk fruit in it as well and might give you less of a grainy texture. 2. (2013) AILET 2023 Exam Ends, Answer Key To Release Soon, Download at nationallawuniversitydelhi.in. No clue what Im doing with this. I did have a few problems while making them though that I wanted to ask you about. Thanks for reviewing it Caitlin, glad you liked it! Agave is the sweetest and will probably take up the least amount of volume so you might get away with a little less since there isnt a lot of room to reduce liquids in this recipe. Theres already xanthan gum in the recipe so how much should I add? It is also used in surgery to maintain joints in a fixed position. Holy Hannah Montana these are tastey. Reactions occurring in the above activity: What remedy would you suggest? Acidic foods like lemon will turn a weird green color in a metal pan sometimes Gelatin comes in powder and sheet form, Knox brand being the most available and well-known in Canada and the U.S. Its the only ingredient that I dont have. These substances are chemically basic in nature. I only have gelatin packets. (d) What would you observe on adding dilute HCl to. I dont normally comment on these things either, but I must so than anyone who loves lemon and wants a satisfying recipe, this is it. The thought of them just makes me happy. In this article, we are going to discuss the Important questions of CBSE Class 10 Chemistry Chapter 2 Acids, Bases and Salts. . The chemical formula is HCOOH. Will post finished product on instagram when completed! Name any salt and give their formulae. Sodium chloride (NaCI) + Water (Salt) Give an example. Is the distilled water acidic/basic/neutral? Soap is basic in nature iii. Answer: Not kept. With examples. Solved the very best collection of Acids, Bases and Salts Class 10 Science Important Questions and Answers Chapter 2 Pdf from the latest NCERT edition books, It will help you in scoring more marks in CBSE Exams. After I strained it. What is formed when zinc reacts with sodium hydroxide? Assertion (A): HCl gas does not change the colour of dry blue litmus paper. A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives the carbonate back. If the liquid of test tube B turns that red litmus paper to blue again, it shows that it is a base. Cut the zest down a bit and added 1 tsp swerve. It is used to bleach wood pulp in paper factories. Since, factory wastes may contain acids or bases and it can kill the fish. 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