A salt ion gives violet vapours when treated with concentrated sulphuric acid, means salt contains :

chloride

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none of the above

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bromide

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iodide

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Solution

The correct option is D iodide
Iodine produces violet colour when it reacts with conc. sulphuric acid. therefore salt contains iodide ion.
Option (b) is correct

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H_{2} S O_{4}

Give reasons for the following :

(a) Sulphuric acid forms two types of salts with NaOH,

(b) Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide,

(d) Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.

H_{2} S O_{4}

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