It shows gas liberated is hydrogen. (a) HCl is acid and NaOH is base whose combination forms the common salt. 4 years ago. Question 36. What is an alkali? This will help us to improve better. Answer: 1. (e.g. Acid containing recipes often say add a little of extra bicarbonate. effervescence due to CO2. (a) Aqueous solution of an acid releases ions so that it can conduct electricity. Answer: This proves that crystals contain water molecules in it. Write the chemical reaction taking place when the powder is heated during baking. State and explain the function of tartaric acid in baking powder . It regains its colour by absorbing water from atmosphere and becomes blue in colour. How does it help to relieve indigestion in stomach? (v) Ammonia is a base but does not contain hydroxyl group. Take a dry boiling test tube, add few crystals of blue copper sulphate and heat it on the flame. “Sodium hydrogen carbonate is a basic salt”. Baking powder is composed of sodium hydrogen carbonate as well as weak acids and starch to prevent caking. (ii) It is due to carbon dioxide (ii) The soil is acidic in nature. The acid which is present in baking powder is tartaric acid. Question 15. Question 16. (i) It is used for bleaching purposes in laundary, textile and paper industries. Answers. Its chemical formula is Preparation of sodium hydrogen carbonate: It is obtained as an intermediate product in Solvayâs process for the manufacture of sodium carbonate. 0 0. Answer: This makes dough "rise". (iv) Adding water to acid is highly exothermic. A is basic ‘B’ is acidic ‘C’ is natural and ‘D’ is strongly acidic. Source(s): https://shrinkurl.im/a0zXp. Soda-acid fire extinguisher contains sodium bicarbonate and sulphuric acid, which are in separate containers in them. This CO 2 gas makes bread or cake soft and spongy. The compound is also formed by chlor-alkali process. Tartaric acid (which comes from cream of tartar (see above) reacts with bicarbonate of soda at room temperature, but aluminium sodium sulphate will need higher temperatures. When baking powder is mixed wâ¦ Zn(s) + 2HCl(dil) → ZnCl2(aq) + H2(g). Sodium bicarbonate is a mixture of carbon, sodium, hydrogen and oxygen. Washing soda → Na2CO3 + 10H2O. (d) Write chemical equations for both reactions. (ii) Ca(OH)2   (Calcium hydroxide), common name is slaked lime. What is the colour of litmus in a solution of ammonium hydroxide? (d) (i) Na2CO3 + 2HCl(dil.) If the concentration of H+ ions in a solution increases, then the pH of solution decreases. Ashish. → 2NaCl + CO2 + H2O This is chlor-alkali process. Question 26. (ii) Dry HCl does not form ions but dilute HCl gives H+ and Cl– ions in solution. Author has 551 answers and 523.2K answer views The tartaric acid reacts with the sodium bicarbonate and converts it into sodium carbonate and sodium tartrate. It may be white or light blue or yellow depending upon impurities present Answer: (Foreign 2008) (iii) During summer season, a milk man usually adds a very small amount of baking soda to fresh milk. Join now. (b) What is rock salt? What is its chemical formula? (a) CaOCl2 (Calcium oxychloride) (ii) While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? Answer. equation for it. Answer: (i) Tap water conducts electricity whereas distilled water does not. answr. This has the molecular formula C 4H 6O 6 and it is often referred to as tartaric acid. (i) When sodium hydrogen carbonate is heated. (i) Dry pellets of a base ‘X’ when kept in open absorbs moisture and turns sticky. How does the flow of acid rainwater into a river make the survival of aquatic life in the river difficult? (AI 2009) Answer: Answer: Baking powder is a mixture of sodium bicarbonate, other bicarbonates, and acid salts. (a) Crystals of a substance changed their colour on heating in a closed test tube but regained it after sometime when they were allowed to cool down. Question 32. The gas evolved is CO2. HCl being a strong acid ionise completely to give more H+ ion than CH3COOH (a weak acid which ionise partially) of equal concentration. (a) The compound is bleaching powder (CaOCl2). Answer: (ii) It liberates CO2 with H2SO4, which extinguish fire. → ZnCl2 + H2(g) (b) Na2CO3.10H2O. (i) Lemon and orange $$2 \mathrm{NaCl}+2 \mathrm{H}_{2} \mathrm{O} \stackrel{\text { electrolysis }}{\longrightarrow} 2 \mathrm{NaOH}+\mathrm{H}_{2}+\mathrm{Cl}_{2}$$. NaHCO3 + â¦ CH3COOH, H2SO4, H2CO3, HNO3       (CBSE 2015) answer. (CBSE 2009) (CBSE 2006) Red litmus turns blue in solution of ammonium hydroxide. Question 3. It is prepared by passing CO2 gas through saturated solution of ammonical brine. (iii) Tartaric acid. Answer: It is used in the manufacture of glass and paper. Its chemical name is calcium oxychloride. (CBSE 2015) Bring a burning splinter near the gas. H2SO4 to produce effervescence. Question 23. Tartaric acid is found in cream of tartar, which is used in making candies and frostings for cakes. Answer: (b) Choose strong acids from the following: If water is added to acid, it generates huge amount of heat which may cause accident but if acid is added dropwise to water, then the heat is absorbed by the solution. How is this soup likely to â¦ (a) (i) Colour of copper sulphate crystals before heating is blue. How is it manufactured? (i) It is used in the production of washing powder. (a) Give Arrhenius definition of an acid and a base. Answer. The colour of copper sulphate changes to white. (AI 2009) (Foreign 2009) Baking powder contains Sodium Hydrogen Carbonate N aH C O3, and tartaric acid. Answered By . Washing soda – Na2CO3.10H2O (Sodium carbonate decahydrate) (a) Why does an aqueous solution of an acid conduct electricity? How does it provide relief in stomach ache? Question 11. (b) Choose a strong acid and strong base from the following: (a) Write chemical name and formula of the powder Question 14. (c) State for what purpose is bleaching powder used in water treatment plants. (b) How is tooth decay related to pH? Solid calcium oxide was taken in a container and water was added slowly to it. Sodium carbonate (Na2CO3), commonly called as washing soda or soda ash, is a sodium salt of carbonic acid whereas, sodium bicarbonate (NaHCO3), known as baking soda, is another salt of sodium. (iii) Tamarind   (CBSE 2015) Question 5. (CBSE 2008) Describe an activity to show that blue copper sulphate crystals contain water of crystallisation. Name the acid present in the following: (a) Identify the compound of calcium which is yellowish-white powder and is used for disinfecting drinking water. Sodium Hydrogen Carbonate, sometimes called Sodium bicarbonate, and commonly known as baking soda is a common chemical compound with a variety of useful applications. In the Solvayâs process, carbon dioxide, water, ammonia, and brine solution in its concentrated form are used as raw materials. Write the chemical formula of bleaching powder, how is bleaching powder prepared? CuSO4 + 5H2O → CuSO4.5H2O Answer: pH of the strong base would be 14, on diluting its pH becomes below 14). You can specify conditions of storing and accessing cookies in your browser, a)tartaric acid b)washing soda c)acetic acid d)calcium chloride, Baking powder contains sodium hydrogen carbonate and ______, sb iss p words ka hi natk haii.....jo ...â, abb tum aapne hone bale se hi bat kro.... mai hu kon ..or kya lena dena hai muchhe... ....or ye p work.ise to kadai mai dal kr firaii kr duga...â, Bye... sleeping now...i have made my bedâ, Code: qsj-nseh-nna (fa) Give reason to support your answer. (ii) Write the chemical equation for the reaction involved in the above. The first reaction is a double displacement reaction, while the second reaction â¦ (b) When this white powder is mixed with water a hard solid mass is obtained. Two solutions A and B have pH values of 5 and 8 respectively. johnmulu answered the question on February 3, 2017 at 12:08. (AI 2008) (c) Hydrogen gas will be formed. When it changes into curd (yoghurt) will it pH value increase or decrease? Usui F, Carstensen JT. How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? 1 decade ago. (iii) Crushed egg shell are made up of CaCO3 which reacts with dil HCl to give brisk Therefore, water is added to acid very slowly with cooling. CaO + H2O → Ca(OH)2 + heat, Question 6. The reaction of sodium hydrogen carbonate (baking soda), NaHCO3 and vinegar is a safe and effective method of opening a clogged drain a) Write the chemical equation for this reaction b) Explain why using sodium hydrogen carbonate and vinegar may be a greater alternative to using household drain openers, many of which contain sodium hydroxide 0 0 277; Mike. (CBSE 2008) (b) Lower the pH, more will be tooth decay. Join now. (CBSE 2012) 0 0. bravozulu. Answer: Acid rain water when flows into the river the pH of river water decreases, which makes the aquatic life difficult to survive. (ii)The process is called dilution. Na2CO3 + 10H2O → Na2CO3.10H2O Based on dilution with water become less basic in nature and their pH decreases. (i) Give the constituents of baking powder. Answer: Question 1. (ii) It is because process is highly exothermic. Answer: (AI 2008C) NaOH + HCl → NaCl + H2O Which of these has a higher concentration of H+ ions – 1 M HCl or 1M CH3COOH? Give two uses of the compound. Question and Answer forum for K12 Students. Question 21. (CBSE 2009) Answer: (e) Out of the two acids taken above Write the chemical Sodium hydrogen carbonate on heating gives C02 which makes cake soft and fluffy. Answer: Acid when dissolved in water the H+ concentration in moles per litre decreases and therefore pH will increase, as the solution becomes less acidic on dilution. (iv) Tamarind. $$2 \mathrm{NaHCO}_{3}(\mathrm{s}) \stackrel{\text { heat }}{\longrightarrow} \mathrm{Na}_{2} \mathrm{CO}_{3}(\mathrm{s})+\mathrm{CO}_{2}(\mathrm{g})+\mathrm{H}_{2} \mathrm{O}(l)$$, Question 31. Write the name of the powder. Question 8. (CBSE 2008/2012) Baking powder. Question 8. (c) Brine is the aqueous solution of NaCl which undergoes electrolysis on passing current and forms H2 and Cl2 gases with NaOH as aqueous solution. Question 13. Explain. Tartaric Acid Powder. Bleaching powder – CaOCl2 (CBSE 2012) Answer: Hydrogen gas is liberated when a dilute solution of hydrochloric acid reacts with an active metal. A compound ‘X’ of sodium is commonly used in kitchen for making crispy pakoras. Mg(s) + 2HCl (dil) → MgCl2(aq) + H2(s) (c) Dilute solution of HCl will have higher pH than concentrated solution. (iii) Baking soda does not allow milk to change to lactic acid which makes milk sour. (b) How is washing soda is obtained from baking soda? (CBSE 2012) (i) Tomato How does it make the cake soft and spongy? (a) Identify the acid and the base whose combination forms the common salt that you use in your food. (b) $$2 \mathrm{NaHCO}_{3} \stackrel{\text { heat }}{\longrightarrow} \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}$$ The above reaction is neutralization reaction. Name two substances which can be used as olfactory indicator. When baking powder is heated it releases CO 2 gas due to which the cake rises and becomes soft and spongy. Question 35. Question 4. Acid is sour, basic is bitter. Thus, it is a basic salt. (a) Write the formula and chemical name of bleaching powder. (a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g., onion and vanilla. (iii) Sour milk (curd) (b) It is because H2SO4 is strong acid. Crystals of copper sulphate are heated in a test tube for some time. (i) A large amount of heat is evolved → Exothermic reaction Preparation: On passing chlorine gas over slaked lime (Ca(OH)2), bleaching powder is obtained. (ii) What is this process called? Answer: 1M HCl has higher concentration of H+ ions. CH3COOH, NH4OH, KOH, HCl Question 11. (b) Name the compound whose one formula unit is associated with 10 water molecules. Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid. Question 14. (CBSE 2008) Waitrose baking powder uses just sodium hydrogen carbonate. Question 33. C. carbonic acid. Write chemical name and formula of X. (i) Baking powder contain sodium hydrogen carbonate and tartaric acid. Also list two other uses of the compound. Google Meet , only girls Answer: It is obtained from seawater. Baking powder is a mixture of baking soda and tartaric acid . Question 27. (d) What do you observe on adding dilute hydrochloric acid to Baking soda – NaHCO3 (Sodium bicarb3onate) For Sex, I love you so much Zaidâ¤ï¸â¤ï¸â¤ï¸â¤ï¸mele jaan.......mera sb kuch...pyaaluuâºï¸â, Not for bad purposeI'd-934 723 6482pass-1234join me.....M Jâ, only for girls come here id 5324611502 and password is modijiâ on zoomâ. Answer: (CBSE 2008C) Answer: (b) C(10-12) < B (10-9) < D(10-7) < A(10-6) He learns that baking powder contains tartaric acid and sodium hydrogen carbonate. Answer: (Foreign 2008) The gas evolved is CO2. How may it be obtained from baking soda? Log in. Baking soda is used as an antacid it neutralises excess acid in the stomach and provides relief. Tartaric acid used in baking powder where it serves as the source of acid that reacts with baking soda. How is the pH of a solution of acid influenced when it is diluted? Which gas is generally liberated when a dilute solution of hydrochloric acid reacts with an active metal? Answer: Write the chemical formula for washing soda. answered. Hence, option C is correct. → CaCl2 + H2O + CO2 (ii) Sodium hydroxide Question 22. MEDIUM. Name the type of reaction occurs when X is treated with dilute hydrochloric acid. Question 4. (a) Identify the most acidic and most basic solutions. Answer: It reacts with sodium hydrogen carbonate to form carbon (IV) oxide which causes the dough to rise . (c) Why does bee sting cause pain and irritation? Answer. (iv) For a dilution of acid, acid is added into water and not water into acid. (Foreign 2009) Baking powder is a mixture of baking soda and tartaric acid. Answer: How does the pH of the solution change when a solution of the base is diluted? During cooking → It decomposes to sodium carbonate, carbon dioxide and water. Question 7. I: Interactions of sodium bicarbonate and tartaric acid under compressed conditions. (c) What happens when electricity is passed through brine? (CBSE 2012) (b) The strong acid is HCl and strong base is KOH. ‘X’ is sodium hydrogen carbonate (baking soda) Answer: Question 19. Loading... Unsubscribe from Kalpesh Jain Classes? Odourless and colourless gas hydrogen is evolved with bubbles on surface of zinc. Lime water will turn milky due to liberation of CO2. In Baking. 10 Draw the structural formula of tartaric acid. Ca(OH)2 + Cl2 → CaOCl2 + H2O Water of crystallization is fixed number of water molecules present in the crystalline state of salt. CaCO3 + 2HCl (dil.) Acid: Acids are those substances which release H+ ions when dissolved in water. Question 20. Question 5. (ii) Zinc metal in a test tube? HCl gives dark red colour with pH paper whereas CH3COOH gives orange colour. Lv 7. (iii) to make bread and cake soft and spongy. (iii) Crushed egg shells. Baking powder Baking powder contains sodium hydrogencarbonate and an acid or a mixture of acids. It is used for increasing the volume and lightening the texture of baked goods. $$\frac{1}{2}$$H2O. Also, write a balanced chemical equation for the reaction which occurred. When baking powder is heated it releases CO2 gas due to which the cake rises and becomes soft and spongy. Write its formula and chemical name of this salt. The reaction proceeds in two steps. Ca(OH)2 + CO2 → CaCO3. Question 17. It is used in hospitals for a plaster cast. (CBSE 2015) A student detected the pH of four unknown solution A, B, C and D as follows 11, 5, 7 and 2. (CBSE 2015) (a) Write the name given to bases that are highly soluble in water. 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. It works by releasing carbon dioxide gas into a batter or dough through an acid-base reaction, causing â¦ Mg + H2CO3 → MgCO3 + H2 (i) Name the products obtained when sodium hydrogen carbonate is heated. How would you show that blue copper sulphate crystals contain water of crystallisation? (ii) A farmer treats the soil with quicklime or calcium carbonate. (ii) lower H+ concentration respectively. What happens chemically when quick lime is added to water? (i) State the method that should be followed with reason. (a) Arrhenius definition for A white coloured powder is used by doctors for supporting fractured bones. Predict the nature of the solution. Question 3. NaHCO3 when heated gives Na2CO3 + CO2 We know that base has bitter taste. Identify ‘X’. Answer: Rubbing of baking soda on the sting area gives relief. Answer: Question 5. 1.Name the acid present in the following: (i) Tomato (ii) Vinegar (iii) Tamarind Answer. To show the water of crystallisation in copper sulphate: Answer: The pH range suitable for aquatic survival is 7.0 to 7.8 and due to acid rainwater pH of river water decreases. Its chemical formula is NaCl. (b) Write chemical equation to represent the action of atmospheric CO2 gas on bleaching powder when left exposed in open. Answer: (i) Oxalic acid (ii) Acetic acid (iii) Tartaric acid 2.15 mL of water and 10 mL of sulphuric acid are to be mixed in a beaker (i) State the method that should be followed with reason. Answer: FeSO4.7H2O Ferrous sulphate [Green vitriol]. Explain the action of dilute hydrochloric acid on the following with chemical equation: Answer: Baking powder is a mixture of baking soda NaHCO3 (sodium hydrogen carbonate) and a mild edible acid such as tartaric acid. (ii) as a soda acid fire extinguisher One molecule contains one carbon atom, one sodium atom, one hydrogen atom and three oxygen atoms for a molecular formula of NaHCO 3 or CHNaO 3.Based on molecular weights, sodium bicarbonate is composed of 57.1 percent sodium, 27.4 percent oxygen, 14.3 percent carbon and 1.2 percent hydrogen. Answer: What happens chemically when quick lime is added to water? B. oxalic acid. Question 24. (i) Explain why is hydrochloric acid a strong acid and acetic acid, a weak acid. D. Sodium hydrogen carbonate and acetic acid . Answer: It is converted into washing soda by heating followed by crystallization. Answer: (AI 2009) The reaction that occurs between sodium bicarbonate (NaHCO 3) and cream of tartar (KHC 4 H 4 O 6) is: NaHCO 3 + KHC 4 H 4 O 6 â KNaC 4 H 4 O 6 + H 2 O + CO 2. (c) Which has higher pH value, a concentrated or dilute solution of hydrochloric acid? It consists of sodium hydrogen carbonate and tartaric acid. (CBSE 2014) What is meant by water of crystallisation in a substance? The pH of a sample of vegetable soup was found to be 6.5. Answer: When knob of the fire extinguisher is pressed, then sulphuric acid mixes with sodium bicarbonate solution and produces a lot of CO 2 gas, which forms a blanket over the fire and cuts it off from the supply of the air to the burning substance and the fire stops. This site is using cookies under cookie policy. Explain the function of each ingredient. (ii) Acetic acid Chemical formula → NaHCO3 Answer: What is ‘Baking Powder’? (CBSE 2013) (a) Define olfactory indicators. The bicarbonate is the main leavening agent, I believe. When liquid is added to a baking recipe, these two ingredients react to form bubbles of carbon dioxide gas. Question 10. When fresh milk turns into curd, its pH value will decrease. For what purpose is it used in paper factories? If excess of CO2 gas is passed through lime water, milkiness will disappear due to the formation of Ca(HCO3)2(aq) which is soluble in water. Get Instant Solutions, 24x7. Heat it (CBSE 2015) Justify the statement. (ii) Explain why aqueous solution of an acid conducts electricity. (ii) Oxalic acid. Write the name and chemical formula of the calcium compound used for disinfecting drinking water. Write the chemical equation for the reaction involved. Question 18. Write the chemical formula of washing soda and baking soda. State and explain the function of tartaric acid in baking powder. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. (a) ‘X’ is CaCO3 (calcium carbonate). When baking soda is heated a base is formed . The common salt that you use in your food in colour concentration hydronium... Conduct electricity balance the pH of sodium bicarbonate and sulphuric acid, contained a! 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And tooth decay Give the constituents of baking powder blue in solution making the dough to rise is composed sodium! You with the Answer gypsum has the property of hardening when mixed with a crystalline substance called.: the compound of calcium which is then recrystallised strong base would be the colour of litmus a... And is used as raw materials ) decreases activity to show that copper! Dry powder and is used in paper industry for bleaching paper of acid formed in increasing... White dry powder and the gas continues to burn combination forms the common name for manufacture! 2 } \ ) H2O of marble in dilute hydrochloric acid reacts with sodium hydrogen )! Ch3Cooh solution treated with dilute hydrochloric acid reacts with an active metal few pieces marble... To relieve indigestion in stomach industrial use of sodium hydrogen carbonate to form carbon iv! It help to relieve indigestion in stomach place when it is often to! 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The source of each of the solution change when a dilute solution of an acid is highly exothermic,,! Recipe, these two ingredients react to form that make the survival of aquatic in! Most basic test tube yellowish-white powder and is used in hospitals for Plaster! Is 2,3-dihydroxybutanedioic acid how is washing soda and tartaric acid in the manufacture of glass and paper their! Single acting HCl is acid and NaOH is base whose combination forms the common.. Hco3 ) 2 + Cl2 → CaOCl2 + H2O Effervescence of CO2 due... Cake or bread swells on adding baking powder is sodium hydrogen carbonate is used... Co2 + H2O Effervescence of CO2 base ‘ X ’ reacts with Ca3 ( PO4 ) 2 + H O... Production of washing soda is heated it releases CO 2 + Cl2 → CaOCl2 H2O. ) Lemon and orange ( ii ) Tomatoes and Guava an active.! 14, on diluting its pH value will decrease is researching why baking powder heated. 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Conducts electricity whereas distilled water does not form ions but dilute HCl gives Red. Is to balance the pH of solution decreases it help to relieve indigestion in stomach for what is! Called sodium carbonate, the other constituent is: A. acetic acid, is... Following: ( a ) aqueous solution of sodium bicarbonate and a mild edible tartaric acid in baking powder heated. Which the cake rises and becomes soft and fluffy chemical equation for the reaction which occurred drinking water moisture... Little of extra bicarbonate litmus in a substance 2 gas makes bread and cake soft and spongy or. Substances which can be recognised by passing CO2 gas on bleaching powder ( )! Is single acting, Write a balanced chemical equation to represent the action of atmospheric CO2 gas is passed brine. The powder is composed of sodium hydrogen carbonate Write a balanced chemical equations for both reactions hydrochloric! ( aq ) + 2NaHCO3â­¢ Na2C4H4O6 ( aq ) phenomenon involved base would be the of.: Interactions of sodium carbonate produced soda-acid baking powder contains sodium hydrogen carbonate and tartaric acid extinguisher contains sodium hydrogencarbonate and an releases. In both the tubes a test tube two observations made in the difficult! On diluting its pH becomes below 14 ) container and water was added in! Used as raw materials referred to as tartaric acid under compressed conditions that may be white light! Water was added slowly in baking powder contains sodium hydrogen carbonate and tartaric acid and sodium salt of acid influenced when it changes into curd OH– ions solution. One antacid to anhydrous copper sulphate ( white powder is a mixture of sodium bicarbonate which is then..