Which of the following should be most volatile?
I. | \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{NH}_2\) |
II. | \(\left(\mathrm{CH}_3\right)_3 \mathrm{~N}\) |
III. | ![]() |
IV. | \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3\) |
1. | II | 2. | IV |
3. | I | 4. | III |
Which of the following reactions belong to electrophilic aromatic substitution?
1. Bromination of acetanilide
2. Coupling reaction of aryldiazonium salts
3. Diazotisation of aniline
4. Acylation of aniline
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The most reactive amine towards dilute hydrochloric acid is:
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Statement I: | In the Hofmann rearrangement reaction, the alkyl group shifts from a carbonyl carbon atom to the nitrogen atom. |
Statement II: | The tertiary amine formed in Hofman rearrangement reaction contains one carbon less than that present in the original amide. |
1. | Both Statement I & Statement II are true. |
2. | Both Statement I & Statement II are false. |
3. | Statement I is true while Statement II is false. |
4. | Statement I is false while Statement II is true. |
1. | The intermediate carbonium ion formed after the initial attack of Br+ at the meta position is the least stabilised. |
2. | The electron density on meta carbon is higher than that on ortho and para positions. |
3. | Loss of aromaticity when Br+ attacks at the ortho and para positions and not at the meta position. |
4. | None of the above. |
Assertion (A): | In strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents. |
Reason (R): | The amino group being completely protonated in a strongly acidic solution, the lone pair of electrons on the nitrogen is no longer available for resonance |
1. | Both (A) & (R) are True and the reason is the correct explanation of the (A). |
2. | Both (A) & (R) are True but the reason is not the correct explanation of the (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Assertion (A): | p-Toluidine is a stronger base than m-toluidine. |
Reason (R): | The methyl group from m-position exerts a smaller electron-donating inductive (+l) effect than from p-position. |
1. | Both (A) and (R) are True and (R) is the correct explanation for (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation for (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Assertion (A): | Anilinium chloride is more acidic than ammonium chloride. |
Reason (R): | The anilinium ion is resonance-stabilised. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True statement but (R) is False. |
4. | Both (A) and (R) are False statements. |