Question

The basic strengths of the hydrides group is elements decrease in the order.

Options

• SbH₃ > PH₃ > AsH₃ > NH₃

• NH₃ > SbH₃ > PH₃ > AsH₃

• NH₃ > PH₃ > AsH₃ > SbH₃

• SbH₃ > AsH₃ > PH₃ > NH₃

Answer 1

SbH₃ > PH₃ > AsH₃ > NH₃ 

Explanation:

The electron density in NH₃ is greatest due to the very small size of the nitrogen atom, whereas it is lowest in SbH₃ due to the very large size of the antimeny.