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Q. No.Consider the given reaction:
The correct order of the set of reagents for the above conversion is:
1.
\(\mathrm{Br}_2 \mid \mathrm{FeBr}_3, \mathrm{H}_2 \mathrm{O}(\Delta), \mathrm{NaOH}\)
2.
\(\mathrm{H}_2 \mathrm{SO}_4, \mathrm{Ac}_2 \mathrm{O}, \mathrm{Br}_2, \mathrm{H}_2 \mathrm{O}(\Delta), \mathrm{NaOH}\)
3.
\(\mathrm{Ac}_2 \mathrm{O}, \mathrm{Br}_2, \mathrm{H}_2 \mathrm{O}(\Delta), \mathrm{NaOH}\)
4.
\(\mathrm{Ac}_2 \mathrm{O}, \mathrm{H}_2 \mathrm{SO}_4, \mathrm{Br}_2, \mathrm{NaOH}\)
Subtopic: Mechanism |
Level 4: Below 35%
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Given below are two statements:
In the light of the above statements, choose the correct answer from the option given below:
| Statement I: | Benzendiazonium chloride is a colourless crystalline solid. It is insoluble in water but reacts with water when warmed. |
| Statement II: | Benzendiazonium chloride on reacting with HCI in presence of copper powder gives chlorobenzene as the product. This is an example of Gatterman reaction. |
| 1. | Both Statement I and Statement II is true. |
| 2. | Both Statement I and Statement II is false. |
| 3. | Statement I is true but Statement II is false. |
| 4. | Statement I is false but Statement II is true. |
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
Level 4: Below 35%
NEET - 2024
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Subtopic: Diazonium Salts: Preparation, Properties & Uses |
Level 3: 35%-60%
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What is the correct increasing order of basicity for the following compounds in aqueous solution?
| (A) | \(\mathrm{CH_3CH_2NH_2}\) | (B) |  |
| (C) |  |
(D) |  |
| 1. | (D) < (C) < (B) < (A) | 2. | (D) < (C) < (A) < (B) |
| 3. | (A) < (B) < (C) < (D) | 4. | (A) < (B) < (D) < (C) |
Subtopic: Amines - Preparation & Properties |
57%
Level 3: 35%-60%
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Arrange the following amines in decreasing order of basicity:
1. (A) > (C) > (D) > (B)
2. (C) > (A) > (B) > (D)
3. (B) > (C) > (D) > (A)
4. (C) > (B) > (A) > (D)
| (A) |  |
(B) |  |
| (C) |  |
(D) |  |
2. (C) > (A) > (B) > (D)
3. (B) > (C) > (D) > (A)
4. (C) > (B) > (A) > (D)
Subtopic: Amines - Preparation & Properties |
52%
Level 3: 35%-60%
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Subtopic: Amines - Preparation & Properties |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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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 |
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
Level 3: 35%-60%
NEET - 2023
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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 |
Level 4: Below 35%
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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 |
Level 3: 35%-60%
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