Which of the following is most reactive towards electrophilic substitution reaction?

1.		2.
3.		4.

In HS^-, I^-,  RNH₂, NH₃  the correct order of proton accepting tendency will be:

The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II), and nitrobenzene (III) is:

1. III > II > I

2. II > III > I

3. I < II > III

4. I > II > III

The compound that is least reactive towards nucleophilic substitution reaction is:

1. ${\mathrm{CH}}_2=\mathrm{CHCl}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}$

3. ${\mathrm{CH}}_2={\mathrm{CHCH}}_2\mathrm{Cl}$

4. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{C}-\mathrm{Cl}$