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Question
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
Solution
H2SO4
Marble chips contain calcium carbonate (CaCO3), which reacts with sulphuric acid (H2SO4) to form carbon dioxide gas (CO2). Carbon dioxide gas, when passed through lime water [Ca(OH)2], turns it milky.
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