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A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:
(a) Na2SO4 (b) CaSO4 (c) H2SO4 (d) K2SO4
Correct Answer: (c) H2SO4.
Explanation: Marble chips contain calcium carbonate which reacts with sulphuric acid to form carbon dioxide which when passed through lime water, turns it milky.
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