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 |
A hydrocarbon C5H10 does not react with chlorine in the dark but gives a single monochloro compound C5H9Cl in bright sunlight. Hydrocarbon could be:
1. | Benzene | 2. | Cyclopentane |
3. | Toluene | 4. | Hexane |
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
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 reaction of alkyl chlorides with aqueous KOH and alcoholic KOH is an example of, respectively:
1. Substitution & Elimination
2. Elimination & Substitution
3. Both are Elimination
4. Both are substitution