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

1.	More energy is required to break the crystal lattice of m-dichlorobenzene
2.	More energy is required to break the crystal lattice of p-dichlorobenzene
3.	More energy is required to break the crystal lattice of o-dichlorobenzene
4.	None of the above

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

Find the correct sequence of the bond enthalpy of the "C-X" bond among the following:

1. CH₃-F < CH₃-Cl > CH₃-Br > CH₃-I

2. CH₃-Cl > CH₃-F > CH₃-Br > CH₃-I

3. CH₃-F < CH₃-Cl < CH₃-Br < CH₃-I

4. CH₃-F > CH₃-Cl > CH₃-Br > CH₃-I

The major product formed in the dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on:

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.

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