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Consider the reactions:
(i) | \(\small{{(CH_3)}_2CHCH_2Br\ \xrightarrow[]{C_2H_5OH}{(CH_3)}_2CHCH_2OC_2H_5 + HBr}\) |
(ii) | \(\small{{(CH_3)}_2CHCH_2Br\ \xrightarrow[]{C_2H_5O^-}{(CH_3)}_2CHCH_2OC_2H_5 + Br^-}\) |
The mechanisms of reactions (i) and (ii) are, respectively:
\(C_6H_5CH_2Br \xrightarrow[2.~H_3O^+] {1.Mg,Ether}~\mathrm X, \)
The product 'X' in the above reaction is:
1. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{OH} \)
2. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_3 \)
3. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{C}_6 \mathrm{H}_5 \)
4. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{OCH}_2 \mathrm{C}_6 \mathrm{H}_5\)
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:
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 |