Q. In pyrophosphoric acid, $H_{4}P_{2}O_{7}$, number of $\sigma$ and $d\pi - p\pi$ bonds are respectively
A) 8 and 2
B) 6 and 2
C) 12 and zero
D) 12 and 2
Explanation
(d)
Draw bond structure and then count bonds.
[image:4_image183.emf]
$\Longrightarrow 12\sigma,\ 2d\pi - p\pi$ bonds.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.