The group that activates the benzene ring towards electrophilic substitution reaction is:

The alkoxy group in aryl alkyl ethers activates the benzene ring towards:

1. Nucleophilic addition reaction

2. Electrophilic addition reaction

3. Nucleophilic substitution reaction

4. Electrophilic substitution reaction

An appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene is/are : 

1.
2.
3.	\(\mathrm{CH_3-CH_2-CH_2-O-CH_3+HBr}\)
4.	\(\mathrm{(CH_3)_3C-OC_2H_5+HI}\)

In Kolbe’s reaction, 

the product formed will be:

1.  para-Salicylaldehyde

2.  ortho-Salicylaldehyde

3. para-Salicylic acid

4. ortho-Salicylic acid

In Reimer-Tiemann reaction, 

the product will be:

1. ortho-Salicylaldehyde

2. para-Salicylaldehyde

3. meta-Salicylaldehyde

4. All of the above

In Williamson ether synthesis, the major product would be:

1. 1-Methoxypropane

2. 2-Methoxypropane

3. 3-Methoxypropane

4. All of the above

Unsymmetrical ether will be the product in:

1. Kolbe’s reaction.

2. Reimer-Tiemann reaction.

3. Williamson ether synthesis.

4. None of the above.