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Subtopic: Amines - Preparation & Properties | Mechanism |
From NCERT
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Match the organic compounds given in List–I with their corresponding pKb given in List–II:
| Amine (List–I) | List - II pKb (aqueous medium) | ||
| A. | Aniline | (i) | 9.0 |
| B. | Ethanamine | (ii) | 3.29 |
| C. | N-Ethylethanamine | (iii) | 3.25 |
| D. | N,N-diethylethanamine | (iv) | 3.0 |
| A | B | C | D | |
| 1. | (i) | (ii) | (iv) | (iii) |
| 2. | (i) | (iv) | (iii) | (ii) |
| 3. | (i) | (ii) | (iii) | (iv) |
| 4. | (ii) | (iii) | (iv) | (i) |
Subtopic: Amines - Preparation & Properties |
From NCERT
JEE
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The correct matches of reagents that are used to react with diazonium salt \((Ph-N^+_2X^-) \) to get the product given against each reagent are:
1. (a) and (b)
2. (a), (b), and (c)
3. (a), (b), (c), and (d)
4. (a), (b), and (d)
| Reagents | Products | |
| (a) | HBF4 | Ph – F |
| (b) | CuCN/KCN | Ph – CN |
| (c) | CuCl2/HCl | Ph – Cl |
| (d) | Ph – NH2 | Ph – N = N – Ph |
2. (a), (b), and (c)
3. (a), (b), (c), and (d)
4. (a), (b), and (d)
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
From NCERT
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Which of the following is the correct sequence of reagents for converting 4-nitrotoluene to 2-bromotoluene?
1. NaNO2/HCl; Sn/HCl; Br2; H2O/H3PO2
2. Sn/HCl; NaNO2/HCl; Br2; H2O/H3PO2
3. Br2; Sn/HCl; NaNO2/HCl; H2O/H3PO2
4. Sn/HCl; Br2; NaNO2/HCl; H2O/H3PO2
1. NaNO2/HCl; Sn/HCl; Br2; H2O/H3PO2
2. Sn/HCl; NaNO2/HCl; Br2; H2O/H3PO2
3. Br2; Sn/HCl; NaNO2/HCl; H2O/H3PO2
4. Sn/HCl; Br2; NaNO2/HCl; H2O/H3PO2
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
From NCERT
NEET - 2023
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NEET 2026 - Target Batch - Vital
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Subtopic: Amines - Preparation & Properties |
78%
From NCERT
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Subtopic: Amines - Preparation & Properties |
58%
From NCERT
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For the following ions, choose the correct statement:
1. III is the most stable in aqueous phase
2. I is the most stable in the aqueous phase
3. III is the smallest in size
4. II is the most stable in the aqueous phase
1. III is the most stable in aqueous phase
2. I is the most stable in the aqueous phase
3. III is the smallest in size
4. II is the most stable in the aqueous phase
Subtopic: Amines - Preparation & Properties |
From NCERT
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A mixture of 1 mol of benzene and 1 mol of nitrobenzene is reacted with 1 mol of acetyl chloride in the presence of AlCl3. The major product(s) is/are:
| 1. | Acetophenone |
| 2. | 3-Nitroacetophenone |
| 3. | 1:1 Mixture of acetophenone and 3-Nitroacetophenone |
| 4. | 1,3-Diacetyl benzene |
Subtopic: Urea & Nitro Compound |
From NCERT
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| 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. |
Subtopic: Mechanism |
From NCERT
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Consider the given two statements:
Options:
| 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. |
Subtopic: Amines - Preparation & Properties |
From NCERT
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NEET 2026 - Target Batch - Vital
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