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 uzide, 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
The most effective reagent among the following to convert 2-phenylpropanamide into 2-phenylpropanamine is:
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
In nitration of benzene using a mixture of conc. H2SO4 and conc. HNO3, the species that initiates the reaction is :
1. NO2
2. NO+
3. NO2+
4. NO2-