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Question

If a salt after rubbing with fingers gives the smell of ammonia, then the salt is:

A
ammonium chloride
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B
sodium carbonate
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C
calcium carbonate
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D
lead sulphide
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Solution

The correct option is C ammonium chloride
If a salt after rubbing with fingers, gives the smell of ammonia, then the salt may be ammonium chloride.
After rubbing, due to warming, ammonium chloride may decompose to give ammonia and hydrogen chloride.
NH4Clwarm−−NH3+HCl

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