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Chemistry - Acids and Bases and Salts

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96. Metal A reacts with water to give B. 'B' is used for white washing. On heating B gives C. C reacts with water to give back B. Identify A, Band C. (NTSE Tamil Nadu, Stage-I, 2016-17) A B C (NTSE Tamil Nadu, Stage-I, 2016-17)

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97. Molecular formula of baking soda is (NTSE Telangana, Stage-I, 2016-17)

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98. Electric current is passed through a concentrated aqueous solution of sodium chloride by meane of a battery. After disconnecting the circuit the solution thus obtained is divided into two equal parts by volume. In one part phenolphthalein and in another part methyl orange indicator was added. The colour of the solutions will be respectively (NTSE West Bengal, Stage-I, 2014-15)

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99. Which of the following is a double salt? (NTSE West Bengal, Stage-I, 2014-15)

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100. A metal carbonate X on treatment with a mineral acid liberates a gas which when passed through aqueous solution of a substance Y gives back X. The substance Y on reaction with the gas obtained at anode during electrolysis of brine gives a compound Z which can decolorise coloured fabrics. The compounds X, Y and Z respectively are(NTSE Stage-II,2014-15)

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Acids and Bases and Salts