Introduction to Electrophilic Substitution

Q.
The major product obtained in the reaction is expected to be:

1. 
2. 
3. 
4. 

Q.

The nitration of benzene is:

1. Nucleophilic substitution

2. Nucleophilic addition

3. Free radical substitution

4. Electrophilic substitution

Q.
The correct order of reactivity towards nucleophilic substitution reaction for the given compound is:

1. $II>III>I$
2. $I>II>III$
3. $II>I>III$
4. $III>I>II$

Q. In nitration of benzene

1. $H_2{\mathrm{SO}}_4\mathrm{protonates}{\mathrm{HNO}}_3$
2. ${\mathrm{HNO}}_3\mathrm{protonates}{H}_2{\mathrm{SO}}_4$
3. $H_2{\mathrm{SO}}_4\mathrm{protonate}\mathrm{benzene}$
4. ${\mathrm{HNO}}_3\mathrm{protonates}\mathrm{benzene}$

Q. In electrophilic aromatic substitution reaction, the nitro group is meta directing because it:

1. Decreases electron density at meta position
2. Increases electron density at ortho and para positions
3. Increases electron density at meta position
4. Decreases electron density at ortho and para positions

Q. At S.T.P. the density of $CC{l}_4$ vapours in g/L will be nearest to :

1. 5.63
2. 2.34
3. 6.87
4. 23

Q. Which species will undergo electrophilic substitution reaction reaction easily ?

1. Ph-SH
2. Ph-OH
3. Ph-O
4. Ph-S

Q. Write one example for an electrophile.

Q. The correct order of electrophilic substitution for the compounds given above will be:

1. $A>B>C$
2. $B>C>A$
3. $C>B>A$
4. $B>A>C$

Q. How anisole reacts with bromine in ethanoic acid? Write the chemical equation for the reaction.