Question

Given below are two statements:

Statement I: The N-N single bond is weaker and longer than that of P-P single bond

Statement II: Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions.

In the light of above statements, choose the correct answer from the options given below:

(1) Statement I is true but statement II is false

(2) Both statement I and statement II are false

(3) Statement I is false but statement II is true

(4) Both statement I and statement II are true

Answer 1

Correct option is: (2) Both statement I and statement II are false

\(\ddot{N} - \ddot{N}\) single bond weaker than \(\ddot{P} - \ddot{P}\) due to more \(\ell p - \ell p\) repulsion.

\(\text{Bond length} \Rightarrow d_{p–p} > d_{N-N}\ (\text{size }\uparrow, B.L. \uparrow)\)

In group 15 elements only N \(\&\) P show disproportionation in +3 oxidation state, As, Sb \(\&\) Bi have almost inert for disproportionation in +3 oxidation state.

So both statements are false.