The compound with the formula C₄H₉Br has how many structural isomers?

1.	6	2.	3
3.	5	4.	4

a. CH₃Br or CH₃I  
b. (CH₃)₃CCl or CH₃Cl
The above-mentioned compounds that react faster in S N₂ reaction with OH^- from each given pair respectively are:

1. CH₃Br, CH₃I
2. CH₃Br, (CH₃)₃CCl
3. CH₃I, CH₃Cl
4. CH₃I, (CH₃)₃CCl

Out of ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{Cl}$ $\mathrm{and}$ ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CHClC}}_6{\mathrm{H}}_5$, the one that gets easily hydrolyzed by aqueous KOH is :

1. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CHClC}}_6{\mathrm{H}}_5$ 

2. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{Cl}$

3. Both react equally

4. None of the above

p-Dichlorobenzene has a higher melting point than those of o- and m-isomers because :

Primary alkyl halide C₄H₉Br(A) reacted with alcoholic KOH to give compound (B). Compound (B) is reacted with HBr to give (C), and it was found that C is an isomer of (A).
(A) with sodium metal, gives compound (D), C₈H₁₈ 
which is different from the compound formed when n-butyl bromide is reacted with sodium.
Compound (A) is :

1. 2-Methylpropene

2. Isobutyl bromide

3. 2,5-Dimethylhexane

4. 2-Bromo-2-methylpropane

In the presence of ZnCl₂, the substrate used to produce 1-iodobutane from HI is?

The best substrate for the preparation of 1-iodobutane in the presence of NaI/dry acetone is:
1. 1-Chlorobutane 
2. n-Butane
3. Butanol
4. Butyne

1. 1-Butanol

2. But-1-ene

3. Butyne

4. Butanal

The correct IUPAC name for the following structure is:

1. 2-Chloro-3-methylbutane

2. 3-Chloro-2-methylbutane

3. 2-Chloro-1-methylbutane

4. 3-Chloro-1-methylbutane

The IUPAC name of the major product upon dehydrohalogenation of 1-bromo-1-methylcyclohexane with sodium ethoxide in ethanol is:

1. Methylenecyclohexane

2. 4-Methylcyclohex-1-ene

3. 1-Methylcyclohex-1-ene

4. None of the above