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Question

How many ammonium ions are present in a molecule of ammonium sulphate?

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is B 2
The valency of ammonium ion is 1, whereas that of sulphate ion is 2.

Thus, crisscrossing their valencies, the formula becomes (NH4)2(SO4).

So, there are 2 ammonium ions present in a molecule of ammonium sulphate.

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