Same chapter3 marksDifficulty: Medium
A white precipitate is formed when sodium hydroxide is added to a salt solution, and it does not dissolve in excess. Name the cation and state one further test.
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2 marksDifficulty: Medium
Name the gas evolved when dilute hydrochloric acid is added to a carbonate, and state how it is identified.
Original Khojo Papers practice question — not from a past board paper.
Answer
Carbon dioxide is evolved. It turns lime water milky, and the milkiness disappears if the gas is passed in excess.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The effervescence itself is the first sign of a carbonate.
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