Q. No.The correct sequence of reagents used for the preparation of
Methyl benzoate from benzene is -
1. a = Br2 / FeBr3 ; b = Mg/ Dry ether ; c = CO2 ; H3O+ ; d = Excess methanol conc. H+ Heat
2. a = Mg/ Dry ether ; b = Br2 / FeBr3 ; c = CO2 ; H3O+ ; d = Excess methanol conc. H+ Heat
3. a = CO2 ; H3O+ ; b = Br2 / FeBr3 ; c = Mg/ Dry ether ; d = Excess methanol conc. H+Heat
4. a = Excess methanol conc. H+ Heat ; b = Br2 / FeBr3 ; c = Mg/ Dry ether ; d = CO2 ; H3O+
| (a) | Mg/ Dry ether |
| (b) | Br2 / FeBr3 |
| (c) | CO2 ; H3O+ |
| (d) | HNO3 + H2SO4 |
| 1. | (a) | (b) | (c) | (d) |
| 2. | (b) | (a) | (c) | (d) |
| 3. | (c) | (b) | (a) | (d) |
| 4. | (d) | (b) | (a) | (c) |
The correct sequence of reagents used for the preparation of Phenylacetic acid from benzene are :
| 1. | a= NBS, hv, and heat; b= CH3Cl/Anhyd.AlCl3; C= KMnO4+KOH; d=H3O+ |
| 2. | a= CH3Cl/Anhyd.AlCl3; b= KMnO4+KOH; C= NBS, hv, and heat; d=H3O+ |
| 3. | a= CH3Cl/Anhyd.AlCl3; b= NBS, hv, and heat; C= H3O+; d=KMnO4+KOH |
| 4. | a= CH3Cl/Anhyd.AlCl3; b= NBS, hv, and heat; C= alc.KCN; d=H |
The correct sequence of reagents used to yield p-Nitrobenzaldehyde from benzene is:
| (a) | CH3Cl /Anhyd. AlCl3 |
| (b) | HNO3 /H2SO4 |
| (c) | CS2 / CrO2Cl2 |
| (d) | H3O+ |
| 1. | (a) | (b) | (c) | (d) |
| 2. | (c) | (b) | (a) | (d) |
| 3. | (b) | (a) | (c) | (d) |
| 4. | (a) | (b) | (d) | (c) |
Chemical test(s) to distinguish between the Propanal and Propanone is :
| 1. | Tollen’s test
|
2. | Fehling’s test
|
| 3. | Iodoform test
|
4. | All of these |
Chemical test(s) used to distinguish between Acetophenone and Benzophenone is :
1. Tollen’s test
2. Fehling’s test
3. Iodoform test
4. All of the above
A chemical test to distinguish between Phenol and Benzoic acid is :
1. Tollen’s test
2. Fehling’s test
3. Iodoform test
4. Ferric chloride test
1. Tollens' test
2. Fehling’s test
3. Iodoform test
4. Sodium bicarbonate test.
Chemical test to distinguish between Pentan-2-one and Pentan-3-one is:
1. Tollen’s test
2. Fehling’s test
3. Iodoform test
4. Ferric chloride test
Chemical test(s) to distinguish between Benzaldehyde and Acetophenone is :
1. Tollen’s test
2. Fehling’s test
3. Iodoform test
4. Tollen’s test and Iodoform test
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