obtained by chlorination of n-butane, will be:
1. Meso form
2. Racemic mixture
3. d-form
4. l-form
An organic compound A in reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. A is:
1. t-butyl chloride
2. sec. butyl chloride
3. Iso butyl chloride
4. n-butyl chloride
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
Out of , the one that gets easily hydrolyzed by aqueous KOH is :
1.
2.
3. Both react equally
4. None of the above
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
In the presence of ZnCl2, the substrate used to produce 1-iodobutane from HI is?
1. | 1-Butanol | 2. | Butane |
3. | Butyne | 4. | Butanal |
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