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Q. No.In nitration of benzene using a mixture of conc. H2SO4 and conc. HNO3, the species that initiates the reaction is :
1. NO2
2. NO+
3. NO2+
4. NO2-
2. NO+
3. NO2+
4. NO2-
Subtopic: Urea & Nitro Compound |
79%
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A compound among the following that does not undergo an azo coupling reaction with benzene diazonium chloride is:
1. Aniline
2. Phenol
3. Anisole
4. Nitrobenzene
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
61%
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Match the reactions given in Column I with the statements given in Column II.
| Column I | Column II |
| A. Ammonolysis | 1. Amine with a lesser number of carbon atoms |
| B. Gabriel phthalimide synthesis | 2. Detection test for primary amines. |
| C. Hofmann bromamide reaction | 3. Reaction of phthalimide with KOH and R—X |
| D. Carbylamine reaction | 4. Reaction of alkyl halides with NH3 |
Codes:
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
Subtopic: Diazonium Salts: Preparation, Properties & Uses | Mechanism |
89%
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Match the compounds given in Column I with the items given in Column II.
| Column I | Column II | ||
| A. | Benzene sulphonyl chloride | I. | Zwitter ion |
| B. | Sulphanilic acid | II. | Hinsberg reagent |
| C. | Alkyl diazonium salts | III. | Dyes |
| D. | Aryl diazonium salts | IV. | Conversion to alcohols |
Codes:
| A | B | C | D | |
| 1. | II | I | IV | III |
| 2. | III | I | IV | II |
| 3. | I | IV | III | II |
| 4. | IV | III | II | I |
Subtopic: Identification of Primary, Secondary & Tertiary Amines |
90%
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Select the correct option based on statements below:
| Assertion (A): | N-Ethylbenzene sulphonamide is soluble in alkali. |
| Reason (R): | The hydrogen attached to nitrogen in sulphonamide is strongly acidic. |
| 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. | (A) is False but (R) is True. |
Subtopic: Identification of Primary, Secondary & Tertiary Amines |
69%
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Select the correct option based on statements below:
| Assertion (A): | Only a small amount of HCI is required in the reduction of nitro compounds with iron scrap and HCI in the presence of steam. |
| Reason (R): | FeCl2 formed gets hydrolyzed to release HCI during the reaction. |
| 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. |
Subtopic: Amines - Preparation & Properties |
86%
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The reagent employed in converting nitromethane to methylamine is:
1. \(\mathrm{SOCl}_2 \)
2. \(\mathrm{NaNH}_2 \)
3. \(\mathrm{PCl}_5 \)
4. \(\mathrm{Sn} / \mathrm{HCl}\)
1. \(\mathrm{SOCl}_2 \)
2. \(\mathrm{NaNH}_2 \)
3. \(\mathrm{PCl}_5 \)
4. \(\mathrm{Sn} / \mathrm{HCl}\)
Subtopic: Urea & Nitro Compound |
90%
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The most effective reagent among the following to convert 2-phenylpropanamide into 2-phenylpropanamine is:
| 1. | Excess H2 |
| 2. | Br2 in aqueous NaOH |
| 3. | Iodine in the presence of phosphorus |
| 4. | LiAlH4 in ether |
Subtopic: Amines - Preparation & Properties |
59%
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The reagent among the following that does not reduce an aryl nitro compound to an amine is:
1. H2(excess) / Pt
2. LiAlH4 in ether
3. Fe and HCI
4. Sn and HCI
Subtopic: Urea & Nitro Compound |
63%
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Which of the following bases is the strongest in an aqueous medium?
1. CH3NH2
2. NCCH2NH2
3. (CH3)2NH
4. C6H5NHCH3
Subtopic: Mechanism |
78%
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