Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
1. Ethyl chloride
2. Isopropyl chloride
3. Benzyl chloride
4. Chlorobenzene
The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl using:
1. | Hypochlorous acid | 2. | Chlorine |
3. | Hydrochloric acid | 4. | Phosphorous pentachloride |
The reactivity order of halides for dehydrohalogenation is:
1. R–F > R–Cl > R–Br > R–I
2. R–I > R–Br > R–Cl > R–F
3. R–I > R–Cl > R–Br > R–F
4. R–F > R–I > R–Br > R–Cl
Given below is a reaction sequence:
\(\begin{aligned} & CH_3CH_2Cl\xrightarrow{NaCN}X\xrightarrow{H_2/Ni}Y\\ &Y\xrightarrow{\text{Acetic Anhydride}}Z \end{aligned}\)
Z in the above reaction is:
1. CH3CH2CH2NHCOCH3
2. CH3CH2CH2NH2
3. CH3CH2CH2CONHCH3
4. CH3CH2CH2CONHCOCH3
\(CH_3CH_2CHCl_2\) upon reaction with \(NaNH_2\)gives:
1. | 2. | ||
3. | 4. |
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
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
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: