Preparation of Benzene and Homologues

Q. For the given reaction:

1. \( NaNH _{2} \) 2. Red hot iron tube, \( 873 K \quad \) Major product

What is A ?

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3. $C{H}_{3}C{H}_{2}C{H}_{2}N{H}_2$

Q. Benzene is obtained by

1. Polymerisation of three C₂H₂ molecules
2. Condensation of three C₂H₂ molecules
3. Substitution of three acetylene molecules
4. Addition of three C₂H₂ molecules

Q.

In the nitration of benzene with a mixture of conc $HN{O}_3$ and conc $H_{2}S{O}_4$, the active species involved are

1. Nitrite ion

2. Nitrate ion

3. Nitronium ion

4. Nitrogen dioxide

Q.

Which of the following produces Benzene as a byproduct?

1. 

2. 

3. 

4. Only a & b

Q.

Which is X, Y and Z respectively ?

1. 

2. 

3. 

4. 

Q. Choose the correct option(s) that give(s) an aromatic compound as the major product.

1. 
2. 
3. 
4. 

Q. The reaction(s) leading to the formation of 1, 3, 5-trimethylbenzene is/are:

1. 
2. 
3. 
4. 

Q. The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?

1. $LiAl{H}_4$
2. $Zn\left(Hg\right)/HCl$
3. $C{H}_{3}MgBr$
4. $NaB{H}_4$

Q.
'A' is:

1. $H_{3}P{O}_2$
2. $H_{3}P{O}_3$
3. $H_{3}P{O}_4$
4. Both (a) & (b)

Q. What happens when sodium benzoate is heated with soda lime?

1. Formation of phenol take place
2. Formation of benzene take place
3. Formation of benzoic acid take place
4. Formation of toluene take place