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Q. No.The reaction(s) that will yield amine as a product with less number of carbon than the reactant is/are:
1.
2.
3.
4.
1. A only
2. B and C only
3. C and D only
4. C only
Subtopic: Amines - Preparation & Properties |
75%
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Assertion(A): The Cl– , Br– and CN– nucleophiles can easily be introduced in the benzene ring of diazonium salt in the presence of Cu(I) ion. This reaction is called Sandmeyer reaction
Reason(R): Aryl fluorides and iodides cannot be prepared by direct halogenation but these can be easily obtained from diazonium salt
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 a true statement but R is false.
4. Both A and R are false statements.
Reason(R): Aryl fluorides and iodides cannot be prepared by direct halogenation but these can be easily obtained from diazonium salt
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 a true statement but R is false.
4. Both A and R are false statements.
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
80%
From NCERT
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| Assertion (A): | When benzene diazonium chloride is reacted with phenol then an azo dye is formed. |
| Reason (R): | It is an example of an electrophilic substitution 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 a true statement but R is false. |
| 4. | Both A and R are false statements. |
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
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Assertion(A): In gattermann reaction, diazonium salt solution is treated with corresponding halogen acid in the presence of copper powder and haloarene is obtained as a product.
Reason(R): The yield in Sandmeyer reaction is found to be better than Gattermann 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 a true statement but R is false.
4. Both A and R are false statements.
Reason(R): The yield in Sandmeyer reaction is found to be better than Gattermann 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 a true statement but R is false.
4. Both A and R are false statements.
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
79%
From NCERT
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Assertion(A): Primary aromatic amines form arenediazonium salts which are stable for a short time in solution at low temperatures (273-278 K).
Reason(R): Alkyldiazonium salt is more stable than arenediazonium salts
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 a true statement but R is false.
4. Both A and R are false statements.
Reason(R): Alkyldiazonium salt is more stable than arenediazonium salts
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 a true statement but R is false.
4. Both A and R are false statements.
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
68%
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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| Assertion (A): | Anilinium hydrogen sulphate, on heating, forms meta-aminobenzene sulfonic acid. |
| Reason (R): | The sulfonic acid group is an electron-donating group. |
| 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 a true statement but (R) is false. |
| 4. | Both (A) and (R) are false statements. |
Subtopic: Mechanism |
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Assertion(A): Aniline does not undergo Friedel- Crafts reaction.
Reason(R): Friedel-Crafts is an electrophilic substitution 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 statement but R is false.
4. Both A and R are false statements.
Reason(R): Friedel-Crafts is an electrophilic substitution 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 statement but R is false.
4. Both A and R are false statements.
Subtopic: Mechanism |
63%
From NCERT
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Assertion(A): p-toluidine is a stronger base than m-toluidine.
Reason(R): 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 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.
Reason(R): 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 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: Amines - Preparation & Properties |
From NCERT
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Select Chapter Topics:
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Q. No.
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