Question

Calculate $x+y+z$ for $H_{3}P{O}_3$ acid, where $x$ is number of lone pair, $y$ is the number of $\sigma$-bonds and $z$ is the number of $\pi$-bonds.

• A. 5
• B. 14
• C. 13
• D. 12

Answer 1

Answer: (C)

13

In the given molecule the number of lone pairs ($x$) is 6, number of sigma bonds ($y$) and number of $\pi$ bonds ($z$) are 6 and 1 respectively. Hence $x+y+z=13$. Hence the correct option is $C$.