Which of the following statements is incorrec | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The electronic configuration of $C_2$ ($12$ electrons) is $KK \sigma(2s)^2 \sigma^*(2s)^2 \pi(2p_x)^2 \pi(2p_y)^2$. The bond order is $(6-2)/2 = 2

Vedclass · Accepted Answer

The number of $\pi$ bonds increases

Vedclass · Answer

(D) The electronic configuration of $C_2$ ($12$ electrons) is $KK \sigma(2s)^2 \sigma^*(2s)^2 \pi(2p_x)^2 \pi(2p_y)^2$. The bond order is $(6-2)/2 = 2$,consisting of two $\pi$ bonds.The electronic configuration of $C_2^{2-}$ ($14$ electrons) is $KK \sigma(2s)^2 \sigma^*(2s)^2 \pi(2p_x)^2 \pi(2p_y)^2 \sigma(2p_z)^2$. The bond order is $(8-2)/2 = 3$,consisting of two $\pi$ bonds and one $\sigma$ bond.Comparing the two,the bond order increases from $2$ to $3$,and the number of $\sigma$ bonds increases from $0$ to $1$. However,the number of $\pi$ bonds remains $2$ in both cases. Therefore,the statement that the number of $\pi$ bonds increases is incorrect.

Which of the following statements is incorrect when $C_2$ changes to $C_2^{2-}$?

Similar Questions

The common features among the species $CN^{-}$,$CO$ and $NO^{+}$ are

Which of the following species is not paramagnetic?

What is the number of unpaired electron$(s)$ in the highest occupied molecular orbital $(HOMO)$ of the following species: $N_2$,$N_2^{+}$,$O_2$,$O_2^{+}$?

Which set consists of paramagnetic molecules or ions?

Bond order of $C_2$ vapour is :

Vedclass Test Series

Exam Paper Generator

Online Exam Module