Q. No.The reagent used for the bromination of phenol to 2,4,6-tribromophenol is/are:
1. Bromine water
2. Br2, CS2
3. Br2, CCl4
4. AgBr
The number of monohydric phenols that can have the molecular formula, \(\mathrm{C}_7 \mathrm{H}_8 \mathrm{O}\) are:
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
Phenol is more acidic than ethanol due to:
1. Resonance
2. Phenoxide ions
3. Less -I effect
4. More ability to gain a proton
The group that activates the benzene ring towards electrophilic substitution reaction is:
| 1. | OH | 2. | NO2 |
| 3. | CN | 4. | COOH |
| 1. | Propene → Propan-2-ol |
| 2. | Benzyl chloride → Benzyl alcohol |
| 3. | Ethyl magnesium chloride → Propan-1-ol |
| 4. | Ethanol →Ethene |
Potassium permanganate reagent is used for :
1. Oxidation of primary alcohol to carboxylic acid.
2. Oxidation of primary alcohol to aldehyde.
3. Bromination of phenol to 2,4,6-tribromophenol.
4. Dehydration of propan-2-ol to propene.
The compound having the lowest boiling point is:
| 1. | Ethanol | 2. | Methanol |
| 3. | Methoxymethane | 4. | Propanol |
The preferred alkyl halide for the synthesis of ether in Williamson synthesis is:
| 1. | Secondary | 2. | Tertiary and secondary both |
| 3. | Tertiary | 4. | Primary |
| 1. | 1-Propoxypropane | 2. | 2-Propoxypropane |
| 3. | 1-Propoxyethane | 4. | 2-Ethoxypropane |
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