Why is the Wurtz reaction not preferred for the preparation of alkanes containing an odd number of carbon atoms?

1.	Boiling points of alkanes obtained in the mixture are very close
2.	Melting points of alkanes obtained in the mixture are very close
3.	Lattice energy of alkanes obtained in the mixture are very close
4.	None of the above

The correct sequence for increasing dipole moment is:

1. CCl₄ < CHCl₃ < CH₂Cl₂
2. CHCl₃ < CH₂Cl₂ < CCl₄
3. CCl₄ < CH₂Cl₂ < CHCl₃
4. CH₂Cl₂ < CCl₄ < CHCl₃

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 compound with the formula C₄H₉Br has how many structural isomers?

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