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Published on: 13/10/2020
12th Standard Chemistry Organic Nitrogen Compounds English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
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1.
\({ CH }_{ 3 }-\overset { \underset { || }{ O } }{ C } -{ NH }_{ 2 }+4(H)\xrightarrow [ Ethanol ]{ Na } \) The compound is ________
Methylamine
Ethylamine
Dimethylamine
Nitro-methane
2.
The intermediate formed in the nitration of benzene is _________
Arenium ion
Carbanion
Oxonium ion
Nitrite ion
3.
Which of the following will not undergo Hoffman's bromamide reaction?
Ethanamide
Propanamide
Methanamide
Phenyl methanamide
4.
The IUPAC name of the compound
\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-{ NO }_{ 2 }\)
1-nitro propane
1-nitro 2-methyl propane
1-nito-2, 2-dimethyl propane
2-nitro-2-methyl propane
5.
When nitro methane condenses with acetone it gives
1-nitro-2-propanol
1-nitro-2-methoxy propane
1-nitro-2-methoxy-ethanol
1-nitro-2-methoxy-propanol
6.
Aniline differs from ethylamine by the reaction with
metallic sodium
an alkyl halide
chloroform and caustic potash
nitrous acid
7.
Oxidation of aniline with acidified potassium dichromate give
p-benzo quinone
benzoic acid
benzaldehyde
benzyl alcohol
8.
The reduction of CH3 - CH2 - C ☰ N with sodium and alcohol results in the formation of
\({ CH }_{ 3 }-\underset { \overset { | }{ { NH }_{ 2 } } }{ CH } -{ CH }_{ 3 }\)
CH3- CH2- CH2- OH + N2
CH3 - CH2 - CH2 - NH2
CH3 - CH2 - NH2
9.
Nitromethane condenses with acetaldehyde to give
nitro propane
1-nitro-2-propanol
2-nitro-1-propanol
3-nitro propanol
10.
Identify the amide which will not undergo Hofmann bromamide reaction
CH3CONHCH3
CH3CH2CONH2
CH3CONH2
both CH3CH2CONH2 and CH3CONH2
11.
Which of the following cannot be prepared by Sandmeyer's reaction?
Iodobenzene
Fluorobenzene
both Iodobenzene and Fluorobenzene
neither Iodobenzene and Fluorobenzene
12.
Nitration of nitrobenzene results in
o-dinitrobenzene
1,3,5 trinitrobenzene
m-dinitrobenzene
p-dinitrobenzene
13.
Among the following, the reaction that proceeds through an electrophilic substitution is : _______.
14.
Ammonium salt of benzoic acid is heated strongly with and the product so formed is reduced and then treated with NaNO2 / HCl at low temperature. The final compound formed is _______.
Benzene diazonium chloride
Benzyl alcohol
Phenol
Nitrosobenzene
15.
IUPAC name for the amine
3 – Bimethylamino – 3 – methyl pentane
3 (N,N – Triethyl) – 3- amino pentane
3 – N,N – trimethyl pentanamine
N,N – dimethyl – 3- methyl - pentan - 3 amine
16.
Secondary nitro alkanes react with nitrous acid to form _______.
red solution
blue solution
green solution
yellow solution
17.
Nitrobenzene on reaction with Con HNO3 / H2SO4 at 80-100oC forms which one of the following products?
1,4 – dinitrobenzene
2,4,6 – tirnitrobenzene
1,2 – dinitrobenzene
1,3 – dinitrobenzene
18.
_______.
H3PO2 and H2O
H+/H2O
HgSO4/H2SO4
Cu2Cl2
19.
20.
The method by which aniline cannot be prepared is _________.
degradation of benzamide with Br2 / NaOH
potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution.
reduction of Nitrobenzene with LiAlH4
reduction of nitrobenzene by Sn / HCl
1.
(b)
Ethylamine
2.
(a)
Arenium ion
3.
(a)
Ethanamide
4.
(b)
1-nitro 2-methyl propane
5.
(d)
1-nitro-2-methoxy-propanol
6.
(d)
nitrous acid
7.
(a)
p-benzo quinone
8.
(c)
CH3 - CH2 - CH2 - NH2
9.
(b)
1-nitro-2-propanol
10.
(a)
CH3CONHCH3
11.
(c)
both Iodobenzene and Fluorobenzene
12.
(c)
m-dinitrobenzene
13.
(b)
14.
(b)
Benzyl alcohol
15.
(d)
N,N – dimethyl – 3- methyl - pentan - 3 amine
16.
(b)
blue solution
17.
(d)
1,3 – dinitrobenzene
18.
(a)
H3PO2 and H2O
19.
(d)
20.
(b)
potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution.
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