Question

A water insoluble substance 'X' on reacting with dilute H2SO4 released a
colourless and odourless gas accompanied by brisk effervescence. When
the gas was passed through water, the solution obtained turned blue
litmus red. On bubbling the gas through lime water, it initially became
milky and the milkiness disappeared when the gas was passed in
excess. Identify the substance 'X'.
Zinc sulphate
Calcium carbonate
Sodium nitrate
carbon dioxide​

Answer 1

Hi There...

Here's the Answer with Explanation:

Calcium carbonate on reacting with dilute sulphuric acid release the colourless and odourless gas accompanied by bricks effervescence, which is called carbondioxide.

The chemical equation for this reaction is CaCO3 + H2SO4 → CaSO4 + H2O + CO2.

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