Multiple Choice QuestionsThe correct order of basicity of the following compounds is
1<2<3<4
1<2<4<3
2<1<3<4
4<3<2<1
C.
2<1<3<4
The correct order is 2<1<3<4. Since, more the number of 2° -NH- group, more is the basic nature.
(i) Thus, 3 and 4 are more basic than 1 and 2.
(ii) Between 3 and 4, 4 has one two NH2 group while 3 has only one NH2 group.
:. 4 is more basic than 3.
(iii) Between 1 and 2, 1 has one -NH2 group with no resonance, thus is more basic than 2.
Amongst the following compounds, the one(s) which readily react with ethanolic KCN.
Ethyl chloride
Chlorobenzene
Benzaldehyde
Salicylic acid
An amine C3H9N reacts with benzene sulphonyl chloride to form a white precipitate which is insoluble in aq. NaOH. The amine is
The reaction of aniline with chloroform under alkaline conditions leads to the formation of
phenylcyanide
phenylisonitrile
phenylcyanate
phenylisocyanate
When aniline is nitrated with nitrating mixture in ice cold condition, the major product obtained is
p-nitroaniline
2,4-dinitroaniline
o-nitroaniline
m-nitroaniline
The basicity of aniline is weaker in comparison to that of methyl amine due to
hyperconjugative effect of Me-group in MeNH2
resonance effect of phenyl group in aniline
lower molecular weight of methyl amine as compared to that of aniline
resonance effect of - NH2 group in MeNH2
An organic compound X is oxidised by using acidified K2Cr2O7. The product obtained reacts with phenyl hydrazine, but does not answer silver mirror test. The possible structure of X is
CH3COCH3
(CH3)2CHOH
CH3CHO
CH3CH2OH
The increasing order of the rate of HCN addition to compound A-D is
A. HCHO B. CH3COCH3
C.PhCOCH3 D. PhCOPh
A< B < C < D
D< B< C< A
D < C < B < A
C < D< B< A
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