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Valency

Which of the ...

Question

Which of the following has a valency of 1?

A

SO₄^2-

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B

MgCO₃

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C

NH₄⁺

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D

None of these

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Solution

The correct option is C
NH₄⁺

NH₄⁺has a valency of one because nitrogen can bond with three hydrogens to attain a noble gas configuration. When it bonds to an extra hydrogen atom, it aquires a positive charge. Hence the valency becomes one.

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