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Published on: 13/10/2020
12th Standard Chemistry Carbonyl Compounds English Medium Free Online Test One Mark Questions 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.
The order of reactivity of carboxylic acid derivatives is _______.
Acid chloride > Ester > Amide > Acid anhydride
Acid chloride > Acid anhydride > Ester > Amide
Acid chloride > Amide > Acid anhydride > Ester
Acid anhydride > Ester > Amide > Acid chloride
2.
The IUPAC name of \(CH_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-COOH\) is ___________.
methyl butanoic acid
2-niethyl butanoic acid
α-methyl butyric acid
3-methyl butanoic
3.
The compound which undergoes intramolecular dehydration with P2O5 is __________.
acetic acid
formic acid
propionic acid
butyric acid
4.
The acid which reduces Tollen's reagent is _________.
acetic acid
benzoic acid
formic acid
oxalic acid
5.
The hybridisation of carbon in CHO group is ________.
dsp2
sp3
sp2
sp
6.
The chain isomer of 2-methyl prop anal is _________.
2-butanone
butanal
2-methyl propanol
but-3 ene-2-ol
7.
With respect to the reagents given below, pick out the odd one _________.
P2O3
P2O5
H2SO4
K2Cr2O7
8.
The carbonyl carbon is ________ hybridised.
sp
sp2
sp3
dsp2
9.
Toluene is oxidised by acidified KMnO4 to _______.
salicylic acid
benzyl alcohol
benzaldehyde
benzoic acid
10.
Which of the following compounds will react with NaHCO3 solution to give sodium salt and CO2?
Acetic acid
n-Hexanol
Phenol
Both (A) and (c)
11.
Give the common and IUPAC name of the compound HO-CH2-\(\underset { \overset { | }{ OH } }{ CH } \)-CHO
glyceraldehyde, hydroxy prop anal
glyceraldehyde, 2, 3 - dihydroxy prop anal
crotonaldehyde, hydroxy propanal
crotonaldehyde, 2, 3 - dihydroxy propanal
12.
An alkene “A” on reaction with O3 and Zn - H2O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.
\(Cl-{ CH }_{ 2 }-CH_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CH_{ 3 } }{ | } }{ CH } } \)
\({ H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 2 }Cl }{ | } }{ CH } -{ CH }_{ 3 }\)
\(\\ { H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CL{ } }{ | } }{ C } } -{ CH }_{ 3 }\)
\({ H }_{ 3 }C-{ CH }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { Cl }{ | } }{ C } } \)
13.
Identify the product formed in the reaction
14.
CH3Br \(\overset { KCN }{ \longrightarrow } (A)\overset { { H }_{ 2 }{ O }^{ + } }{ \longrightarrow } (B)\overset { { PCl }_{ 5 } }{ \longrightarrow } \) (C) product (c) is ______.
acetylchloride
chloro acetic acid
\(\alpha\)- chlorocyano ethanoic acid
none of these
15.
Benzoic acid \(\overset { i){ NH }_{ 3 } }{ \underset { ii)\Delta }{ \longrightarrow } } A\overset { NaOBr }{ \longrightarrow } B\overset { NaN{ O }_{ 2 }/HCl }{ \longrightarrow } \) C 'C' is ______.
anilinium chloride
O – nitro aniline
benzene diazonium chloride
m– nitro benzoic acid
16.
\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.
Formaldelyde
di acetone ammonia
hexamethylene tetraamine
oxime
17.
Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.
Grignard reagent
Sn / HCl
hydrazine in presence of slightly acidic solution
hydrocyanic acid
18.
The correct structure of the product ‘A’ formed in the reaction ______.
19.
Assertion: p – N, N – dimethyl amino benzaldehyde undergoes benzoin condensation
Reason: The aldehydic (-CHO) group is meta directing.
Codes:
A) if both assertion and reason are true and reason is the correct explanation of assertion.
B) if both assertion and reason are true but reason is not the correct explanation of assertion.
C) assertion is true but reason is false
D) both assertion and reason are false
if both assertion and reason are true and reason is the correct explanation of assertion.
if both assertion and reason are true but reason is not the correct explanation of assertion.
assertion is true but reason is false
both assertion and reason are false
20.
Assertion: 2,2 – dimethyl propanoic acid does not give HVZ reaction.
Reason: 2 – 2, dimethyl propanoic acid does not have \(\alpha\) - hydrogen atom
Codes:
A) if both assertion and reason are true and reason is the correct explanation of assertion.
B) if both assertion and reason are true but reason is not the correct explanation of assertion.
C) assertion is true but reason is false
D) both assertion and reason are false
if both assertion and reason are true and reason is the correct explanation of assertion.
if both assertion and reason are true but reason is not the correct explanation of assertion.
assertion is true but reason is false
both assertion and reason are false
1.
(b)
Acid chloride > Acid anhydride > Ester > Amide
2.
(d)
3-methyl butanoic
3.
(b)
formic acid
4.
(c)
formic acid
5.
(c)
sp2
6.
(b)
butanal
7.
(d)
K2Cr2O7
8.
(b)
sp2
9.
(d)
benzoic acid
10.
(a)
Acetic acid
11.
(b)
glyceraldehyde, 2, 3 - dihydroxy prop anal
12.
13.
14.
15.
16.
X - HCHO
Y - (CH2)6N4
17.
(c)
hydrazine in presence of slightly acidic solution
18.
(b)
19.
B) if both assertion and reason are true but reason is not the correct explanation of assertion.
20.
A) if both assertion and reason are true and reason is the correct explanation of assertion.
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