Hybridisation

Q.

What are the Limitations of the Valence Bond Theory?

Q.

Describe isolobal species with examples?

Q. Define hybridisation.

Q.

What is the formula of allyl isocyanide? How many sigma and pi bonds are present in it?

Q.

Shape of the molecule having sp hybridization is:

1. Linear

2. Trigonal planar

3. Square planar

4. Tetrahedral

Q. How many angular nodes are present in $d_{xy}$ orbital?

Q. The $\%$ increase of s-character in the hybrid orbitals of carbon in $C{H}_4,C_2{H}_4,C_2{H}_2$ follow the order:

1. $C{H}_4>C_2{H}_4>C_2{H}_2$
2. $C_2{H}_4<C{H}_4<C_2{H}_2$
3. $C{H}_4<C_2{H}_4<C_2{H}_2$
4. $C_2{H}_4<C_2{H}_2<C{H}_4$

Q. A compound with molecular formula $C_4{H}_{4}O$ has all the four carbon atoms and the oxygen atom in the ring. It also has two double bonds. The compound is:

1. homocyclic and aromatic
2. heterocyclic and aromatic
3. homocyclic but not aromatic
4. heterocyclic but not aromatic

Q. Toluene has:

1. $6\sigma$ and $3\pi$ - bonds
2. $9\sigma$ and $6\pi$ - bonds
3. $9\sigma$ and $3\pi$ - bonds
4. $15\sigma$ and $3\pi$ - bonds

Q. How many sigma and pi bonds are present in the following molecule given below:

1. sigma $C-C$ bonds $=4$, sigma $C-H$ bonds $=6$, pi C-C bonds $=3$
2. sigma $C-C$ bonds $=5$, sigma $C-H$ bonds $=6$, pi $C-C$ bonds $=2$
3. sigma $C-C$ bonds $=4$, sigma $C-H$ bonds $=2$, pi $C-C$ bonds $=5$
4. sigma $C-C$ bonds$=4$, sigma $C-H$ bonds $=4$, pi $C-C$bonds $=4$

Q. The no. of $\sigma$ & $\pi$ bonds present in $C_2{H}_2$ respectively are:

1. $1,2$
2. $2,1$
3. $3,2$
4. $5,2$

Q. Number of $\pi$ bonds in $C_6{H}_{12}$(non cyclic compound) is/are :

Q.

Promotion of electron is not essential condition prior to hybridization.

1. False

2. True