The number of tertiary carbon atoms in tertiary butyl alcohol are-

The number of primary carbon atoms in the following compound are:

The cylindrical shape of an alkyne is due to the presence of- 

1. Three sigma C-C bonds

2. Three π C-C bonds

3. Two sigma C-C and one π C-C bonds

4. One sigma C-C and two π C-C bonds

The shortest C-C bond distance is found in               

1. Diamond             

2. Ethane

3. Benzene             

4. Acetylene

Which one of the following has the shortest carbon-carbon bond length?                      

1. Benzene                     

2. Ethene

3. Ethyne                         

4. Ethane

The distance between two adjacent carbon atoms is largest in

1. Benzene             

2. Ethene

3. Butane              

4. Ethyne

The correct increasing order of carbon-carbon bond length in the given compounds is: 

1. III<II<I<IV

2. IV<I<II<III

3. I<II<III<IV

4. I<IV<III<II

Hybridisation of N in pyrrole  is

1. sp                               
2. sp²
3. sp³                             
4. sp³d

The sigma bond energy of C-H bond in C₂H₆ is:

(1) 99 kcal

(2) 140 kcal

(3) 200 kcal

(4) 60 kcal