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Question

Among the following hydrides of group 15 elements, the most stable hydride is:


A

AsH3

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B

PH3

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C

SbH3

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D

NH3

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Solution

The correct option is D

NH3


NH3 is the most stable hydride among the hydrides of group 15 elements because the strength of E-H (Here E = N, P, As, Sb, or Br) bond decreases down the group due to increase in size of the central atom.


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