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Published on: 01/11/2019
Carbonyl Compounds
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1.
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
2.
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.
more extensive association of carboxylic acid via van der Waals force of attraction
formation of carboxylate ion
formation of intramolecular H-bonding
formation of intermolecular H – bonding
3.
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 ______.
\(Cl-{ CH }_{ 2 }-CH_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CH_{ 3 } }{ | } }{ CH } } \)
\({ H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 2 }Cl }{ | } }{ CH } -{ CH }_{ 3 }\)
\(\\ { H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CL{ } }{ | } }{ C } } -{ CH }_{ 3 }\)
\({ H }_{ 3 }C-{ CH }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { Cl }{ | } }{ C } } \)
4.
In which of the following reactions new carbon – carbon bond is not formed?
Aldol condensation
Friedel craft reaction
Kolbe’s reaction
Wolf kishner reduction
5.
Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.
sodium benzoate and phenol
Sodium benzoate and phenyl methanol
phenyl methanol and sodium benzoate
none of these
6.
The reagent used to distinguish between acetaldehyde and benzaldehyde is _______.
Tollens reagent
Fehling’s solution
2,4 – dinitrophenyl hydrazine
semicarbazide
7.
Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid.
Phenylmethanal
ethanal
ethanol
methanol
8.
Which one of the following reaction is an example of disproportionation reaction.
Aldol condensation
cannizaro reaction
Benzoin condensation
none of these
9.
In which case chiral carbon is not generated by reaction with HCN?
10.
Identify the product formed in the reaction
11.
The IUPAC name of
but – 3- enoicacid
but – 1- ene-4-oic acid
but – 2- ene-1-oic acid
but -3-ene-1-oicacid
12.
_______.
13.
Which one of the following reduces tollens reagent
formic acid
acetic acid
benzophenone
none of these
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.
Ethanoic acid \(\overset { P/{ Br }_{ 2 } }{ \longrightarrow } \) 2-bromoethanoic acid. This reaction is called _______.
Finkelstein reaction
Haloform reaction
Hell – Volhard – Zelinsky reaction
none of these
16.
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
17.
Which of the following represents the correct order of acidity in the given compounds
FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
CH3COOH > ClCH2COOH > FCH2COOH > Br-CH2COOH
Cl CH2COOH > CH3COOH > BrCH2COOH > ICH2COOH
18.
Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)
(CH3)2 C(OH)C6H5
CH3CH(OH)C6H5
CH3CH(OH)CH2- CH3
19.
\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.
Formaldelyde
di acetone ammonia
hexamethylene tetraamine
oxime
20.
In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.
Tollen’s test
Victor meyer test
Iodoform test
Fehling solution test
21.
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
22.
23.
The correct structure of the product ‘A’ formed in the reaction ______.
24.
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
25.
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.
(a)
2.
(d)
formation of intermolecular H – bonding
3.
4.
(d)
Wolf kishner reduction
5.
6.
(b)
Fehling’s solution
7.
8.
(b)
cannizaro reaction
9.
10.
11.
12.
13.
14.
15.
(c)
Hell – Volhard – Zelinsky reaction
16.
17.
- I etiect increases the acidity. If electronegativity is high, - I effect is also high.
18.
19.
X - HCHO
Y - (CH2)6N4
20.
21.
(c)
hydrazine in presence of slightly acidic solution
22.
(d)
23.
(b)
24.
B) if both assertion and reason are true but reason is not the correct explanation of assertion.
25.
A) if both assertion and reason are true and reason is the correct explanation of assertion.
12th Standard Syllabus & Materials
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