Q. Which of the following statements is wrong?
A) The stability of hydrides increases from $NH_{3}\$to $BiH_{3}$ in group 15 of the Periodic Table.
B) Nitrogen cannot from $d\pi - p\pi$ bond.
C) Single $N - N$ bond is weaker than the single $P - P$ bond.
D) $N_{2}O_{4}$ has two resonance structure.
Explanation
(a)
Thermal stability of the hydrides decrease as we go down the group in Periodic Table for group 15 (N-family)
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ BiH_{3} < SbH_{3} < AsH_{3} < PH_{3} < NH_{3}$
Least stable Most stable
M-H $-$ 255 247 322 391
Bond-energy
$kJmol^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.