An $S_{N}1$ reaction at an asymmetric carbon of a compound always gives

1. An enantiomer of the substrate

2. A product with opposite optical rotation

3. A mixture of diastereomers

4. A maximum racemized product

The most reactive compound for S_N2 reaction among the following is: 

1.		2.
3.		4.

Which of the following compounds undergoes nucleophilic substitution reaction most easily?

1.		2.
3.		4.

The most suitable reagent for the following conversion is:

\(\begin{align} CH_3CH_2CH_2CH_3 \rightarrow\ & CH_3CH_2CH_2CH_2Cl\ +\ \\ & CH_3CH_2CHClCH_3\end{align} \)

1. Cl₂/UV light

2. NaCl + H₂SO₄

3. Cl₂ gas in dark

4. Cl₂ gas in the presence of iron in dark

Compound(s) among the following with an asterisk (*) asymmetric carbon is/are:

1.  (a), (b), (c), (d)
2.  (a), (b), (c)
3.  (b), (c), (d)
4.  (a), (c), (d)

Product ‘A’ in the following reaction is:

1.		2.
3.		4.

Arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.

1.  (i) < (ii) < (iii) 

2.  (ii) < (i) < (iii) 

3.  (iii) < (ii) < (i) 

4.  (i) < (iii) < (ii) 

Arrange the following halides in the decreasing order of S_N1 reactivity:

(I) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Cl}$

(II) ${\mathrm{CH}}_2=\mathrm{CHCH}\left(\mathrm{Cl}\right){\mathrm{CH}}_3$

(III) ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}\left(\mathrm{Cl}\right){\mathrm{CH}}_3$

1. I > II > III

2. II > I > III

3. II > III > I

4. III > II > I

Identify (Z) in the following reaction sequence:

C₂H₅I $\underset{\mathrm{KOH}}{\overset{\mathrm{Alcoholic}}{\to }}$(X) $\underset{}{\overset{{\mathrm{Br}}_2}{\to }}$(Y) $\stackrel{\mathrm{KCN}}{\to }$(Z):

1. CH₃-CH₂-CN     

2. $\underset{\mathrm{CN}}{\underset{|}{{\mathrm{CH}}_2}}-\underset{\mathrm{CN}}{\underset{|}{{\mathrm{CH}}_2}}$

3. $\underset{Br}{\underset{|}{{\mathrm{CH}}_2}}-\underset{\mathrm{CN}}{\underset{|}{{\mathrm{CH}}_2}}$     

4. $\underset{\mathrm{CN}}{\underset{|}{\mathrm{CH}}}=\underset{\mathrm{CN}}{\underset{|}{\mathrm{CH}}}$