Lewis Dot Structure

Q. Which of the following Lewis acid – base interactions are associated with the further involvement of d-orbitals?

i) $Sb{F}_5+HF\to H^{+}[Sb{F}_6{]}^{-}$
ii) $N{H}_3+B{F}_3\to H_{3}NB{F}_3$
iii) $AlC{l}_3+C{l}^{-}\to AlC{l}_4^{-}$
iv) $S{F}_4+F^{-}\to [S{F}_5{]}^{-}$

1. (i) and (ii)
2. (i) and (iv)
3. (ii) and(iii)
4. (i) and (iii)

Q. The total number of lone pair present in the molecule $Xe{F}_4$ is:

1. 10
2. 12
3. 14
4. 16

Q. A valid Lewis structure cannot be drawn for which of the following compounds?

1. $N{F}_3$
2. $C{H}_4$
3. $IC{l}_5$
4. $Si{F}_4$

Q. The valency of O in phosphoric acid is:

1. 2
2. 4
3. 6
4. 2

Q. The valency of $S$ in Sulphuric acid $\left(H_{2}S{O}_4\right)$ is:

1. 2
2. 8
3. 4
4. 6

Q. In $N{O}_3^{-}$ ion, the number of bond pair and lone pair of electrons present on nitogen atom is:

1. 2, 2
2. 3, 1
3. 1, 3
4. 4, 0

Q. In $N{O}_3^{-}$ ion, the number of bond pairs and lone pairs of electrons on the nitrogen atom are?

1. 3, 0
2. 3, 1
3. 4, 1
4. 4, 0

Q. In $N{O}_3^{-}$ ion, the number of bond pairs and lone pairs of electrons on the nitrogen atom are?

1. 3, 0
2. 3, 1
3. 4, 1
4. 4, 0

Q. The diverse chemistry of xenon happens only with fluorine and oxygen.

1. True
2. False

Q.

How many $e^{-}$ are present in the kernel of Cl?

1. 7

2. 10

3. 8

4. 12

Q. Which of the following is the most stable structure for $N_{2}O$?

1. 
2. 
3. 
4. All of the above

Q. Which of the following is a correct representation of lewis dot structure of lithium?

1. 

2. 

3. 

4. 

Q. In $N{O}_3^{-}$ ion, the number of bond pair and lone pair of electrons present on nitogen atom is:

1. 2, 2
2. 3, 1
3. 1, 3
4. 4, 0

Q. Which of the following does not obey the octet or duplet rule?
$\left(i\right)H_{2}O\left(ii\right)B{F}_3\left(iii\right)PC{l}_5\left(iv\right)C{O}_2\left(v\right)N{H}_3$

1. $\left(i\right),\left(ii\right),\left(iii\right)$
2. $\left(ii\right),\left(iii\right)$
3. $\left(ii\right),\left(iii\right),\left(iv\right)$
4. $\left(i\right),\left(iv\right),\left(iii\right)$

Q. The number of paired and unpaired electrons in the Lewis symbol for $S$ atom is:

1. 2, 2
2. 4, 2
3. 2, 4
4. 0, 6

Q. The formation of $P{H}_4^{+}$ is difficult as compared to $N{H}_4^{+}$ because:

1. The lone pair of phosphorous resides at a $s{p}^3$ orbital
2. The lone pair of phosphorous resides in almost a pure $s-$ orbital
3. The lone pair of phosphorous resides in almost a pure $p-$ orbital
4. The lone pair of phosphorous is optically inert

Q. The total number of lone pairs of electron in $I_3^{-}$ ion is:

1. 12
2. 3
3. 6
4. 9

Q. $LiCl$ and $BC{l}_3$ are examples of .

1. Duplets
2. Incomplete Octet
3. Half-filled Octet