Q. No.Consider the following reaction.
Identify the products A and B respectively:
1. A= R-CH2-CN; B= R-CH2-NC
2. A= R-CH2-NC; B= R-CH2-CN
3. A= R-NCH-CH3; B= R-CH2-CN
4. A= R-CH2-NC; B= R-CHN-CH3
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| Assertion (A): | The reactivity of alkyl halide for nucleophilic substitution reaction follows the order Rl > RBr > RCl |
| Reason (R): | Leaving ability of halide ions follows the order: I- > Br- > Cl- |
| 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 but (R) is False. |
| 4. | Both (A) and (R) are False. |
3CH3Cl + SbF3 → 3CH3F + SbCl3
The name of the above reaction is:
1. Finkelstein reaction.
2. Sandmeyer's reaction.
3. Gattermann reaction.
4. Swart's reaction.
| Column-I (Reaction) |
Column-II
(Name of reaction)
|
||
| (A) | \(2 \mathrm{C}_2 \mathrm{H}_5 \mathrm{Br}+2 \mathrm{Na} \stackrel{\text { dry ether }}{\longrightarrow} \\\mathrm{C}_4 \mathrm{H}_{10}+2 \mathrm{NaBr}\) | (i) | Wurtz- Fittig reaction |
| (B) | \(\small\mathrm{CH}_3 \mathrm{Br}+\mathrm{AgF} \longrightarrow \mathrm{CH}_3 \mathrm{~F}+\mathrm{AgBr}\) | (ii) | Swartz reaction |
| (C) | \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{Br}+2 \mathrm{Na}+\mathrm{BrC}_2 \mathrm{H}_5 \stackrel{\text { dryether }}{\longrightarrow}\\ \mathrm{C}_6 \mathrm{H}_5 \mathrm{C}_2 \mathrm{H}_5+2 \mathrm{NaBr} \) | (iii) | Fittig reaction |
| (D) | \(2 \mathrm{C}_6 \mathrm{H}_5 \mathrm{Br}+2 \mathrm{Na} \stackrel{\text { dry ether }}{\longrightarrow}\\ \mathrm{C}_6 \mathrm{H}_5-\mathrm{C}_6 \mathrm{H}_5+2 \mathrm{NaBr}\) | (iv) | Wurtz reaction |
1. (A) → (iv), (B) → (iii), (C) → (ii), (D) → (i)
2. (A) → (ii), (B) → (iii), (C) → (iv), (D) → (i)
3. (A) → (iv), (B) → (ii), (C) → (i), (D) → (iii)
4. (A) → (iii), (B) → (iv), (C) → (i), (D) → (ii)
| Assertion (A): | Aryl halides and vinyl halides are less reactive than alkyl halides and are not easily hydrolyzed. |
| Reason (R): | The cleavage bond in aryl halides acquires a double bond character due to resonance, which makes its cleavage difficult. |
| 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, but (R) is False. |
| 4. | Both (A) and (R) are False. |
| Column-I (2- Bromopropane + Reagent) |
Column-II (Product) |
||
| A. | Alc.KOH | 1. | Nitrile |
| B. | Alc.KCN | 2. | Alkene |
| C. | AgNO2 | 3. | Ester |
| D. | CH3COOAg | 4. | Nitro |
1. A–2; B–1; C–3; D–4
2. A–2; B–1; C–4; D–3
3. A–2; B–3; C–1; D–4
4. A–1; B–2; C–4; D–3
The order of reactivity of following alcohols with halogen acids is:
| I. |  |
| II. |  |
| III. |  |
1. (I) >(II) > (III)
2. (III) > (II) > (I)
3. (II) >(I) > (III)
4. (I) >(III) > (II)
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| 1. |  |
2. |  |
| 3. |  |
4. | None of the above |
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Arrange the following compounds in increasing order of their boiling points.
| (i) |  |
| (ii) |  |
| (iii) |  |
1. (ii) < (i) < (iii)
2. (i) < (ii) < (iii)
3. (iii) < (i) < (ii)
4. (iii) < (ii) < (i)
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