Introduction to Haloalkanes

Q.

The decreasing order of reactivity of the following compounds towards nucleophilic substitution (${\mathrm{S}}_{\mathrm{N}}2$) is:

1. $\left(\mathrm{III}\right)>\left(\mathrm{II}\right)>\left(\mathrm{IV}\right)>\left(\mathrm{I}\right)$

2. $\left(\mathrm{IV}\right)>\left(\mathrm{II}\right)>\left(\mathrm{III}\right)>\left(\mathrm{I}\right)$

3. $\left(\mathrm{II}\right)>\left(\mathrm{III}\right)>\left(\mathrm{IV}\right)>\left(\mathrm{I}\right)$

4. $\left(\mathrm{II}\right)>\left(\mathrm{III}\right)>\left(\mathrm{I}\right)>\left(\mathrm{IV}\right)$

Q.

The true statement about product(s) is :

1. Two products are formed which are diastereomers.
2. Two products are formed which are enantiomers.
3. Three compounds are formed which are stereomers.
4. Four compounds are formed which are stereomers.

Q.

The reactivities of methyl chloride, propyl chloride and chlorobenzene are in

the order

[KCET 1988]

1. Methyl chloride > propyl chloride > chlorobenzene

2. Propyl chloride > methyl chloride > chlorobenzene

3. Methyl chloride > chlorobenzene > propyl chloride

4. Chlorobenzene > propyl chloride > methyl chloride

Q.
The number of $E_1$ product(s) formed by the above reaction is .