The reagent among the following that does not reduce an aryl nitro compound to an amine is:
1. H2(excess) / Pt
2. LiAlH4 in ether
3. Fe and HCI
4. Sn and HCI
In order to prepare a 1o amine from an alkyl halide with the simultaneous addition of one CH2 group in the carbon chain, the reagent used as a source of nitrogen is-
1. Sodium amide, NaNH2
2. Sodium azide, NaN3
3. Potassium cyanide, KCN
4. Potassium phthalimide,
The source of nitrogen in Gabriel synthesis of amines is:
1. Sodium amide, NaN3
2. Sodium azide, NaNO2
3. Potassium cyanide, KCN
4. Potassium phthalimide
Amongst the given set of reactants, the most appropriate for preparing 2o amine is:
1. | 2o R - Br + NH3 |
2. | 2oR — Br + NaCN followed by H2/Pt |
3. | 1o R — + RCHO followed by H2/Pt |
4. | 1o R — Br(2 mol) + potassium phthalimide followed by O+/ heat |
1. | Excess H2 |
2. | Br2 in aqueous NaOH |
3. | Iodine in the presence of phosphorus |
4. | LiAlH4 in ether |
The best reagent for converting, 2-phenylpropanamide into 1-phenylethanamine is .... ....
1. Excess H2 / Pt
2. NaOH /
3. NaBH4 / Methanol
4. LiAlH4 / Ether
Hofmann bromamide degradation reaction is shown by:
1 | PhNH2 | 2. | PhCONH2 |
3. | PhNO2 | 4. | PhCH2NH2 |
The correct increasing order of basic strength for the following compounds is:
(I) | (II) | (III) |
1. II < III < I
2. III < I < II
3. III < II < I
4. II < I < III
Methylamine reacts with HNO2 to form-
1. | CH3-O-N=O | 2. | CH3-O-CH3 |
3. | CH3-OH | 4. | CH3CHO |
The gas evolved when methylamine reacts with nitrous acid is .............
1. NH3
2. N2
3. H2
4. C2H6