The following are some statements related to VA group hydrides, I. Reducing property increases from…

The following are some statements related to VA group hydrides, I. Reducing property increases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$. II. Tendency to donate lone pair decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$. III. Thermal stability of hydrides decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$. IV. Bond angle of hydrides decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$. The correct statements are
  1. I, II, III and IV
  2. I, III and IV
  3. I, II and IV
  4. I and IV

Solution

The reducing property of the hydrides of $\mathrm{VA}$ group increases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$ $\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 < \mathrm{BiH}_3$ The tendency to donate lone pair or basic strength decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$. Thermal stability of VA group hydrides decrease from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$ $\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{BiH}_3$ Bond angle of VA group hydrides decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$ $\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{BiH}_3$

Asked in: AP EAMCET 2007

Practice more Elements of Group 1 and 2 questions on Aicharya