Bond Pairs and Lone Pairs

Q.

Match the following

$\begin{array}{ccc}\text{1.}PC{l}_3& \text{a. 2 lone pairs}& \text{A. 5 Ligands}\\ \text{2.}Cl{F}_3& \text{b. 3 lone pairs}& \text{B. 3 Ligands}\\ \text{3.}Xe{F}_6& \text{c. 0 lone pairs}& \text{C. 6 Ligands}\\ \text{4.}SbC{l}_5& \text{d. 1 lone pairs}& \text{D. 4 Ligands}\end{array}$

1. 1 - b, C; 2 - b, B; 3 - a, A, 4 - a, A

2. 1 - d, B; 2 - a, B; 3 - d, C; 4 - c, A

3. 1 - c, B; 2 - a, C; 3 - a, B, 4 - a, B

4. 1 - b, B; 2 - b, C; 3 - b, B, 4 - a, A

Q.

The number of bond pairs and lone pairs in $H_{2}O$ are _____ & _____ respectively.

1. 4, 0

2. 2, 1

3. 2, 0

4. 2, 2

Q.

The shape of covalent molecule $M{X}_3$ is

1. Pyramidal

2. T - shaped

3. Triangular

4. Either of these depending on the number off lone pairs of electrons on M

Q.

The number of electron pairs in $OS{F}_4$ is

1. 4

2. 6

3. 5

4. 5.5

Q.

The total number of lone-pairs of electrons in melamine is _____

1. 2

2. 4

3. 6

4. 8

Q. Which of the following order is correct about repulsions?

1. 

2. 

3. 

4. 

Q.

Total number of lone pairs in $XeO{F}_4$ is:

1. 2

2. 3

3. None of these

4. 1

Q. The total number of lone pairs of electrons present in $N_2{O}_3$ is

Q. The sum of the number of lone pairs of electrons present on each central atom in the following species is
$[TeB{r}_6{]}^{2-},[Br{F}_2{]}^{+},SN{F}_3$ and $[Xe{F}_3{]}^{-}$
(Atomic numbers: $N=7,F=9,S=16,Br=35,Te=52,Xe=54$)

Q. Which of the following does not contain any coordinate bond?

1. $H{F}_2^{-}$
2. $H_3{O}^{+}$
3. $B{F}_4^{-}$
4. $N{H}_4^{+}$