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Q. No.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 |
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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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Subtopic: Amines - Preparation & Properties | Mechanism |
From NCERT
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The most stable diazonium salt among the following is :
1. p‐Nitrobenzene‐diazonium chloride
2. 2,4‐Dinitrobenzene‐diazonium chloride
3. 2,4,6‐Trinitrobenzene‐diazonium chloride
4. p‐Methoxybenzene‐diazonium chloride
1. p‐Nitrobenzene‐diazonium chloride
2. 2,4‐Dinitrobenzene‐diazonium chloride
3. 2,4,6‐Trinitrobenzene‐diazonium chloride
4. p‐Methoxybenzene‐diazonium chloride
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
From NCERT
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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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