- 1(current)
Q. No.| Assertion (A): | Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid. |
| Reason (R): | The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophile, NO2+ . |
| 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. |
The catalyst used in the conversion of benzene into acetophenone is:
1. Anhydrous AlCl3
2. HNO3
3. HCl
4. Heating
What products are formed when the following compound is treated with Br2 in the presence of FeBr3?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
| Assertion (A): | Toluene, on undergoing Friedel–Crafts methylation, yields a mixture of ortho- and para-xylene. |
| Reason (R): | The \(-\text{CH}_3\) group already present on the benzene ring in toluene increases electron density at the ortho and para positions, directing |
| 1. | Both (A) and (R) are True, and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, and (R) is not the correct explanation of (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | (A) is False, but (R) is True. |
The reagent used in the above conversion is:
1. Cr2O3
2. Alc. KOH
3. Red hot Fe
4. NaNH2/liq.NH3
The products of ozonolysis of 1,2-dimethyl benzene (o-xylene) are:
1. Methylglyoxal, 1, 2-dimethylglyoxal, and glyoxal
2. Methylglyoxal, 1, 3-dimethylglyoxal, and glyoxal
3. Methylglyoxal, 1, 4-dimethylglyoxal, and glyoxal
4. Methylglyoxal, 1, 5-dimethylglyoxal, and glyoxal
Which of the following will undergo nitration most easily: benzene, m-dinitrobenzene, or toluene?
| 1. | Benzene | 2. | m–Dinitrobenzene |
| 3. | Toluene | 4. | None of the above |
Lewis acid(s) that can be used during the ethylation of benzene is/are:
| 1. |
|
2. |
|
| 3. |
|
4. | All of the above |
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Q. No.
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