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 |
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-
Reduction of aromatic nitro compounds using Fe and HCl gives:
1. Aromatic oxime
2. Aromatic hydrocarbon
3. Aniline
4. Aromatic amide