alleryStart learning →Which gas turns freshly prepared lime water milky?
Asulphur dioxide
Bhydrogen sulphide
Cnitrogen dioxide
Dcarbon dioxide
Answer & Solution
Correct answer: D. carbon dioxide
1. Lime water is a solution of calcium hydroxide.
2. Carbon dioxide reacts: Ca(OH)2 + CO2 gives CaCO3 + H2O.
3. The insoluble calcium carbonate makes the lime water milky.
_Source: AP/TS SCERT Class 10 Physical Science, "Acids, Bases and Salts"_
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