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A and B are two salts. A reacts both wit...

A and B are two salts. A reacts both with dil `H_2SO_4` and conc. `H_2SO_4` to give reddish brown vapours. However, B reacts only with conc. `H_2SO_4` to give similar vapours. Hence A and B are respectively

Text Solution

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First of all, mercury ions form a complex (I) with aetylene . Since `H_2O` is more nucleophilic than `SO_4^(2-)` ion, it attacks the complex (I) to form first vinyl alcohol which then tautomerises to give acetaldehyde

In case of dil. HCl, since , `Cl^-` ion is more nucleophilic than `H_2O` it reacts with complex (I) to form vinyl chloride.
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