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TS EAMCET · Chemistry · Hydrogen

The correct order of reducing abilities of hydrides of V group elements is

  1. A \(\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 < \mathrm{BiH}_3\)
  2. B \(\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{BiH}_3\)
  3. C \(\mathrm{NH}_3 < \mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{BiH}_3\)
  4. D \(\mathrm{SbH}_3>\mathrm{BiH}_3>\mathrm{AsH}_3>\mathrm{NH}_3>\mathrm{PH}_3\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 < \mathrm{BiH}_3\)

Step-by-step Solution

Detailed explanation

The reducing character of the hydrides of group V elements depends upon the stability of hydrides. With progressive decrease in stability, the reducing character of hydrides increases as we move down the group. Thus, ammonia, being stable, has least reducing ability. The order…