Q. No.
Identify Z in the following reaction:
\(CH_3CH_2CH=CH_2 \xrightarrow[H_2O,\ H_2O_2,\ OH^-]{B_2H_6} Z \)
| 1. | \(CH_3CH_2CH_2CH_2OH\) | 2. | \(CH_3CH_2 \ C \ HCH_3 \\~~~~~~~~~~~~~~~~~~| \\~~~~~~~~~~~~~~~~OH\) |
| 3. | \(CH_3CH_2CH_2CHO \) | 4. | \(CH_3CH_2CH_2CH_3 \) |
An appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene is/are :
| 1. |  |
| 2. |  |
| 3. | \(\mathrm{CH_3-CH_2-CH_2-O-CH_3+HBr}\) |
| 4. | \(\mathrm{(CH_3)_3C-OC_2H_5+HI}\) |
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.
Find the correct reason for the higher boiling point of propanol compared with butane.
1. Butane molecules are held together by strong ionic forces.2. Propanol molecules form intermolecular hydrogen bonds.
3. Propanol molecules form intramolecular hydrogen bonds.
4. Butane molecules form intramolecular hydrogen bonds.
Preparation of ethers by 2 or 3-degree alcohols in an acidic medium is not a suitable method because:
| 1. | In case of secondary or tertiary alcohols, ketone is obtained as a product. |
| 2. | In case of secondary or tertiary alcohols, aldehyde is obtained as a product. |
| 3. | In case of secondary or tertiary alcohols, alkene is obtained as a product. |
| 4. | In case of primary alcohols, alkene is obtained as a product. |
Select the correct option based on statements below:
| Assertion (A): | p-Nitrophenol is more acidic than phenol. |
| Reason (R): | Nitro group helps in the stabilization of the phenoxide ion by dispersal of negative charge due to resonance. |
| 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. |
Match the reactions from Column-I with their corresponding descriptions from Column-II and select the correct option.
|
Column-l (Name of Reaction) |
Column-ll (Description of Reaction) |
||
| A. |
Reimer-Tiemann reaction |
I. |
Conversion of phenol to o-hydroxysalicylic aid |
| B. |
Kolbe's reaction |
II. |
Heated copper at 573K |
| C. |
Conversion of 2alcohol to a ketone |
III. |
Reaction of an alkyl halide |
| D. |
Williamson's synthesis |
Iv. |
Conversion of phenol to salicylaldehyde |
Codes:
| A | B | C | D | |
| 1. | II | III | IV | I |
| 2. | III | IV | I | II |
| 3. | I | IV | III | II |
| 4. | IV | I | II | III |
Match the starting material in Column I with the products formed (Column II) in the reaction with HI.
| Column I |
Column II |
||
| A. |  |
1. |  |
| B. |  |
2. |  |
| C. |  |
3. |  |
| D. |  |
4. |  |
| 5. |  |
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 5 | 2 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 2 | 1 |
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