The halogen exchange reaction among the following is exhibited by:  

1.
2.
3.
4.

A hydrocarbon C₅H₁₀ does not react with chlorine in the dark but gives a single monochloro compound C₅H₉Cl in bright sunlight. Hydrocarbon could be:

The correct statement regarding ambident nucleophiles is:

1. Nucleophiles have equal atomic weight.

2. Nucleophiles have only five electrons.

3. Nucleophiles have two nucleophilic sites.

4. Nucleophiles have two electrophilic sites.

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

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

A major product is obtained by the dehydrohalogenation of 2-Chloro-2-methyl butane with sodium ethoxide in ethanol. The product's IUPAC name is:

1. 2-Methyl-2-butene

2. 2-Methyl-1-butene

3. 1-Methyl-2-butene

4. Methyl butene

(CH₃)₃CCH₂CH(Br)C₆H₅ is: 

1. Secondary benzyl halide

2. Secondary alkyl halide

3. Primary alkyl halide

4. Secondary allyl halide

CH₃CH₂CH(CH₃)CH(C₂H₅)Cl is:

1. Secondary benzyl halide

2. Secondary alkyl halide

3. Primary alkyl halide

4. Secondary allyl halide