1. ⇒ (MHT CET 2023 12th May Evening Shift )

What is bond order of F $_{2}$ molecule?

A. $\frac{1}{2}$

B. 1

C. 2

D. 3

Correct Option is (B)

The electronic configuration of $F_{2}$

$\begin{aligned} (σ 1 s)^{2} {(σ^{*} 1 s)}^{2} (σ 2 s)^{2} {(σ^{*} 2 s)}^{2} {(σ 2 p_{z})}^{2} {(π 2 p_{x})}^{2} {(π 2 p_{y})}^{2} {(π^{*} 2 p_{x})}^{2} {(π^{*} 2 p_{y})}^{2} \\ Bond order of F_{2} molecule = \frac{N_{b} - N_{a}}{2} = \frac{10 - 8}{2} = 1 \end{aligned}$

2. ⇒ (MHT CET 2021 21th September Morning Shift )

What is the formal charge on carbon atom in CO $_{3}^{2 -}$ ion ?

A. $- 2$

B. $- 4$

C. +4

D. zero

Correct Option is (D)

MHT CET 2021 21th September Morning Shift Chemistry - Chemical Bonding and Molecular Structure Question 13 English Explanation

Formal charge on C atom

= V.E. $-$ N.E. $-$ $\frac{1}{2}$ B.E.

= $4 - 0 - \frac{1}{2} (8)$

= 0

3. ⇒ (MHT CET 2021 20th September Evening Shift )

What is bond angle O-S-O in SO $_{2}$ molecule?

A. 107 $^{\circ}$

B. 180 $^{\circ}$

C. 90 $^{\circ}$

D. 119.5 $^{\circ}$

Correct Option is (D)

MHT CET 2021 20th September Evening Shift Chemistry - Chemical Bonding and Molecular Structure Question 16 English Explanation

4. ⇒ (MHT CET 2021 20th September Evening Shift )

Which of the following bonds has highest bond enthalpy?

A. N-N in NH $_{3}$

B. O=O in O $_{2}$

C. C-H in CH $_{4}$

D. N $\equiv$ N in N $_{2}$

Correct Option is (D)

Due to highest bond order in N $_{2}$ , it has highest bond enthalpy.

⇒Chemical Bonding