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NEET Chemistry MCQ
Carboxylic Acids And Their Derivatives Mcq Neet Chemistry
Quiz 7
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Q.1
Which of the following is least acidic? .... [ Punjab CET 19985]
0%
a) C2H5OH
0%
b) CH3COOH
0%
c) C6H5OH
0%
d) ClCH2COOH
Explanation
Alcohols are less acidic than phenols which are less acidic than carboxylic acids Answer : (a)
Q.2
Hydrolysis of trichloromethane with aqueous KOH gives
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a) Methanol
0%
b) Acetylene
0%
c) Potassium format
0%
d) Chloral
Explanation
Answer : (c)
Q.3
Among the given compounds, the most suseptible to nucleophilic attack at the carbonyl group is ... ... [ IIT 1997]
0%
a) MeCOOCOMe
0%
b) MeCOCl
0%
c) MeCHO
0%
d) MeCOOMe
Explanation
Acid chlorides are most reactive towards nucleophilic attack Answer : (b)
Q.4
Which of the following compounds will be optically active? [ Haryana CEET 1991]
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a) (CH3)2CHOH
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b) CH3CH2CH2CH3
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c) CH3 - CHCl - COOH
0%
d) (CH3)3CCl
Explanation
has chiral carbon atom and is hence optically active Answer : (c)
Q.5
on Q186) The IUPAC name of the compound is
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a) 4-Carboxyhexane-1,6-dioic acid
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b) 2-(Carboxymethyl)pentane-1,5-dioic acid
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c) Butane-1,2,4-tricarboxylic acid
0%
d) 3-carboxyhexane-1,6-dioic acid
Explanation
Answer : (c)
Q.6
Acetic acid reacts with PCl5 to form
0%
a) CHCl2COOH
0%
b) CH3COOCl
0%
c) CH2ClCOOH
0%
d) CH3COCl
Explanation
CH3COOH + PCl5 → CH3COCl + POCl3 + HCl Answer : (d)
Q.7
HCOOH reacts with conc. H2SO4 to produce
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a) CO2
0%
b) NO2
0%
c) CO
0%
d) NO
Explanation
It is dehydration reaction to produce CO and water Answer : (c)
Q.8
on Q189) In a set of reactions acetic acid yielded a product S The structure of S would be
0%
a)
0%
b)
0%
c)
0%
d)
Explanation
Answer : (c)
Q.9
Which of the following decreasing order of acid strength of I. Methanoic acid II. Ethanoic acid IV. Propanoic acid IV. Butanoic acid is correct?
0%
a) I > II > IIII > IV
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b) IV > III > II > I
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c) I > IV > III > II
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d) IV > I > II > III
Explanation
Greater the +I effect of alkyl group lesser is the acididc strength. Thus order of acidic strengh is as per option"a" Answer : (a)
Q.10
On warming formic acid with ammonical silver nitrate, the product formed is
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a) formaldehyde
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b) metallic silver
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c) silver oxide
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d) silver formate
Explanation
HCOOH + Ag2O → H2O + CO2 + 2Ag ( silver mirror) Answer : (b)
Q.11
Identify the wrong statement from the following .... ... [ Tamilnadu CET 2002]
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a) Salicylic acid is a monobasic acid
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b) Methyl salicylate is an ester
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c) Salicylic acid gives violet colour with neutral ferric chloride as well as brisk effervescence with sodium bicarbonate
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d) Methyl salicylate does not occur in natural oils
Explanation
Methyl salicylate occurs in some natural oil like oil of winter green Answer : (d)
Q.12
Between CH3COOH and HCOOH, HCOOH will be
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a) Less acidic
0%
b) More acidic
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c) Equally acidic
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d) None
Explanation
Answer : (b)
Q.13
4-Methylbenzenesulphonic acid reacts with sodium acetate to give .... ... [ IIT 2005]
0%
a)
0%
b)
0%
c)
0%
d)
Explanation
Answer : (a)
Q.14
Which of the following compounds is the reactant in Rosenmund'd reduction?
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a) CH3CO2H
0%
b) CH3CHO
0%
c) CH3CH2Cl
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d) CH3COCl
Explanation
Acid chlorides are the reactant of Rosenmund's reaction Answer : (d)
Q.15
on Q196) End product of this conversion
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a)
0%
b)
0%
c)
0%
d)
Explanation
Answer : (a)
Q.16
Which of the following is a strong reducing agent
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a) Benzoic acid
0%
b) Ethanoic acid
0%
c) Methanoic acid
0%
d) Chloroacetic acid
Explanation
Answer : (c)
Q.17
Rearrangement of an oxime to an amide in the presence of strong acid is called .... .. [ DEC 2002]
0%
a) Aldol condensation
0%
b) Beckmann rearrangement
0%
c) Fries rearrangement
0%
d) Curtius rearrangement
Explanation
Beckmann rearrangement Answer : (b)
Q.18
The salicylic acid reacts with both the neutral FeCl3 solution and in esterification reaction because it contains
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a) both an acid and ester group
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b) both an acid group and a phenolic group
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c) both an acid group and an aldehyde group
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d) both an acid group and an alcoholic group
Explanation
-COOH group under go esterification reaction while OH group reacts with FeCl3 and develop blue colour Answer : (b)
Q.19
Acetyl chloride can not be obtained by treating acetic acid with
0%
a) CHCl3
0%
b) PCl3
0%
c) PCl5
0%
d) SOCl2
Explanation
CHCl3 is chloroform does not yield acetyl chloride Answer : (a)
Q.20
The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
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a) acyl chloride > acid anhydride > ester > amide
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b) ester > acyl chloride > amide > acid anhydride
0%
c) acid anhydride > amide > ester > acyl chloride
0%
d) acyl chloride > ester > acid angydride > amide
Explanation
Better is leavig group higher will be reactivity of acyl compound towards nucleophile acyl substitution. Weaker is the base, better is leaving group stronger is base, weaker is its acid and vive-versa Answer : (a)
Q.21
Which of the following acids has smallest dissociation contsant? [ IIT 2002]
0%
a) CH3CHFCOOH
0%
b) FCH2CH2COOH
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c) BrCH2CH2COOH
0%
d) CH3CHBrCOOH
Explanation
α-Haloacids are stronger than β-Haloacids and electron withdrawing inductive effect of F is greater than that of Br. Hence BrCH2CH2COOH is the weakest acid and has smallest dissociation constant Answer : (c)
Q.22
3-chloro-4methyl benzene sulphonic acid on steam distillation gives ... ..[ Roorkee 1996]
0%
a) toluene
0%
b) m-chloro benzene sulphonic acid
0%
c) p-methyl benzene sulphonic acid
0%
d) o-chloro toluene
Explanation
Answer : (d)
Q.23
Which of the following compounds is resistant to nucleophilic attack of hydroxyl ion
0%
a) Acetonitrile
0%
b) Acetonitrile
0%
c) Acetamide
0%
d) Diethyl ether
Explanation
Acid derivatives have electron deficient carboxylic carbon but there is no electron deficient site in ether Answer : (d)
0 h : 0 m : 1 s
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