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Question

An example of an anhydrous salt is-


A

Blue Vitriol

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B

Green Vitriol

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C

Sal ammoniac

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Solution

The correct option is C

Sal ammoniac


Explanation of the correct option:

The correct option is C.

  1. Ammonium chloride (NH4Cl) is also known as Sal ammoniac.
  2. It is an anhydrous salt as there are no water molecules attached to it.

Hence, an example of an anhydrous salt is Sal ammoniac.

Explanation of the incorrect options:

Option A:

Blue vitriol is the pentahydrate salt of Copper (II) Sulphate solution. Thus, it is not an anhydrous salt.

Formula: CuSO4.5H2O

Option B :

Green vitriol is the heptahydrate salt of Ferrous Sulphate solution. Thus, it is not an anhydrous salt.

Formula: FeSO4.7H2O

An example of an anhydrous salt is Sal ammoniac.


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