What would be the colour of litmus in a solution of sodium carbonate? Baking powder is a mixture of sodium hydrogen carbonate with tartaric acid which readily reacts with sodium carbonate and neutralizes it. (Foreign 2009) (ii) Explain why aqueous solution of an acid conducts electricity. For what purpose is it used in hospitals? (b) Write the balanced chemical equation of Chlor-alkali process. Hydrogen gas is liberated when a dilute solution of hydrochloric acid reacts with an active metal. (CBSE 2015) Write the chemical equation for its preparation. The colour of copper sulphate changes to white. (a) A metal compound ‘X’ reacts with dil. Name the source from where it is obtained. When baking powder is heated it releases CO 2 gas due to which the cake rises and becomes soft and spongy. If one of the compound formed is calcium sulphate, then what is ‘X’ and the gas evolved? H2 and Cl2 gases are liberated. equation for it. (CBSE 2012) It shows gas liberated is hydrogen. → 2NaCl + CO2 + H2O (AI 2008C) (ii) Ca(OH)2 (Calcium hydroxide), common name is slaked lime. Answer: Na2CO3 + 10H2O → Na2CO3.10H2O Question 2. (ii) Sodium chloride and water will be formed (CBSE 2015) NaHCO 3 + Acid â CO 2 + H 2 O + Sodium salt of acid. (CBSE 2008) A is basic ‘B’ is acidic ‘C’ is natural and ‘D’ is strongly acidic. answer. (ii) It is used for the manufacture of glass. (ii) The soil is acidic in nature. Answer: Question 21. e.g., CUSO4.5H2O Copper sulphate [Blue vitriol] (i) Citric acid. Loading... Unsubscribe from Kalpesh Jain Classes? 0 0. bravozulu. Answer: (CBSE 2012) Sodium hydrogen carbonate and tartaric acid. A white coloured powder is used by doctors for supporting fractured bones. Answer: (sodium carbonate decahydrate) Question 11. What is an alkali? Usui F, Carstensen JT. Why does 1M HCl solution have a higher concentration of H+ ions than 1M CH3COOH solution? Question 10. (AI 2008) (a) Identify the acid and the base whose combination forms the common salt that you use in your food. (b) When this white powder is mixed with water a hard solid mass is obtained. Name two substances which can be used as olfactory indicator. (ii) It is used for preparation of chloroform. 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. (a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g., onion and vanilla. (iii) Lactic acid. (a) CaOCl2 (Calcium oxychloride) Our Double Acting Baking Powder assures uniform gas release, during all of the baking process, thus assuring the highest quality of the finished product. NaHCO3 when heated gives Na2CO3 + CO2 We know that base has bitter taste. What will happen if excess of gas is passed through lime water? How can it be verified? (CBSE 2008/2012) Question 7. Kalpesh Jain Classes. If you don't, you affect the taste. Source(s): https://shrinkurl.im/a0zXp. (ii) as a soda acid fire extinguisher What happens chemically when quick lime is added to water? (a) A will show vigorous reaction. (v) Ammonia is a base but does not contain hydroxyl group. Question 32. Tartaric acid used in baking powder where it serves as the source of acid that reacts with baking soda. Question 26. Use: It is used in paper industry for bleaching paper. Soda-acid fire extinguisher contains sodium bicarbonate and sulphuric acid, which are in separate containers in them. Heat 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. (CBSE 2012) (c) State the change in colour of pH paper on dipping in solution C and D. (CBSE 2012) It is obtained from seawater. Solid calcium oxide was taken in a container and water was added slowly to it. Answer: Answer: Question 1. (a) What is the colour of copper sulphate crystals (d) Write chemical equations for both reactions. Answer: The chemical formula of sodium hydrogen carbonate is NaHCO, it is a white solid crystal salt composed of sodium and bicarbonate ions. When it changes into curd (yoghurt) will it pH value increase or decrease? Tartaric acid neutralizes the bitterness due to sodium carbonate produced. Baking powder contains Sodium Hydrogen Carbonate N aH C O3, and tartaric acid. How is it converted into washing soda? D. Sodium hydrogen carbonate and acetic acid . (Foreign 2009) (iii) During summer season, a milk man usually adds a very small amount of baking soda to fresh milk. Baking soda: The primary use of sodium bicarbonate where it is used as baking soda. It is called sodium carbonate decahydrate or washing soda. The carbon dioxide produced gives the fluffy texture. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. (ii)The process is called dilution. (d) Mg + H2SO4 → MgSO4 + H2 Tartaric Acid Powder. Question 20. A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. CaO + H2O → Ca(OH)2 + heat, Question 6. How does it help to relieve indigestion in stomach? (ii)What is this process called? Also, write a balanced chemical equation for the reaction which occurred. (i) Sodium carbonate placed in test tube. Answer: on flame, the blue crystals change to white dry powder and the inner surface of the test tube condenses with water. Question 14. Write its formula and chemical name of this salt. Answer: Name the substance and write its formula and explain the phenomenon involved. (i) Baking powder contain sodium hydrogen carbonate and tartaric acid. (b) When solution of an acid is diluted, concentration of hydronium ions (H3O+) decreases. 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. Thus, it is a basic salt. Why? How is it prepared? Answer: (b) C(10-12) < B (10-9) < D(10-7) < A(10-6) (CBSE 2006) Baking powder is a mixture of baking soda and tartaric acid. (ii) Vinegar Answered By . Lemon juice < Blood < NaOH solution. Question 16. (i) It is used in the production of washing powder. Base: Bases are those substances which release OH– ions when dissolved in water, Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate. Answer: (CBSE 2012) Chemical formula → NaHCO3 Give an example, D. tartaric acid. (b) How is washing soda is obtained from baking soda? 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