Carboxylic Acids MCQs
MCQ's from chapter 13 Carboxylic Acids chemistry book 2 for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.
1) The function group in Citric acid is
a) – OH b) – OR
c) – COOH d) – COOR
2) Esters have general formula
a) ROH b) RCHO
c) RCOOR d) RCOOH
3) The acid present in butter is called
a) Formic acid b) Acetic acid
c) Propionic acid d) Butanoic acid
4) Which one of the following is the strongest acid?
a) CH3COOH b) CH2ClCOOH
c) CHCl2COOH d) C2H5COOH
5) Anhydrous acetic is a crystalline, hygroscopic solid and is also known as
a) Dilute acetic acid
b) Glacial (ice like) acetic acid
c) Methanoic acid
d) None of these
6) Acetyl chloride is formed by the reaction of acetic acid with
a) Thionyl chloride b) Ammonia
c) Alcohol d) Sodium hydroxide
7) Acetic acid is a weak acid because in aqueous solution it is
a) Highly ionized
b) Weakly ionized
c) Insoluble in water
d) No replaceable hydrogen
8) Which of the following is a monobasic acid?
a) H2SO4 b) H2CO3
c) H3PO4 d) CH3COOH
9) Hydrolysis of esters in alkaline medium is called
a) Sponification b) Hydration
c) Esterification d) None of these
10) Which one of the following does not have a carboxylic group?
a) Benzoic acid b) Ethanoic acid
c) Aspirin d) Picric acid
11) Two moles of carboxylic acids on heating in the presence of P2O5 yields
a) Alcohol b) Ether
c) Acetic acid d) Ester
12) Which of them is a strong reducing agent?
a) Formic acid b) Acetic acid
c) Oxalic acid d) Chloro acetic acid
13) Methanoic acid acts as
a) Powerful oxidizing agent
b) Mild oxidizing agent
c) Powerful reducing agent
d) Mild reducing agent
14) Between acetic acid and formic acid, the former one is
a) Less acidic b) More acidic
c) Same strength d) More basic
15) Beta hydroxyl propionic acid is
a) Citric acid b) Aspartic acid
c) Oxalic acid d) Lactic acid
16) Formic acid can reduce
a) Mercuric chloride b) Tollen’s reagent
c) KMnO4 d) All of these
17) The number of H – bonds formed per molecule of carboxylic acid are
a) 4 b) 3
c) 2 d) 1
18) The attachment of electron withdrawing groups result into the
a) Increase of acidity b) Decrease of acidity
c) Increase of strength d) All of these
19) The firs four members of carboxylic acid are completely soluble in water. This is due to
a) Acidic nature b) H – bonding
c) Polymerization d) Reduction
20) Sodium bi carbonate when reacts with a compound “X” as result CO2 liberates with effervescence the compound “X” contain
a) – OH b) – CHO
c) X d) – COOH
21) The carboxylic acid which is used for coagulating rubber latex is
a) Ethanoic acid b) Methanoic acid
c) Propanoic acid d) All of these
22) Acetic acid when reacts with chlorine in the presence of red phosphorus, the product formed is
a) Acetyl chloride b) Methyl chloride
c) Methyl ester d) Chloro acetic acid
23) Which of them has two functional groups?
a) Amino acid b) Salicylic acid
c) Acetone d) Both a & b
24) Amino acids having two NH2 group are
a) Acidic in nature b) Neutral in nature
c) Saltish in nature d) Basic in nature
25) The compound which occur as zwitter ion or dipolar are
a) Ketones b) Aldehydes
c) Alcohol d) Amino acid
26) The dipolar structure of an amino acid is also called
a) Basic salt b) Acidic salt
c) Neutral salt d) Interval salt
27) The test used to identify amino acid is
a) Tollen’s test b) Fehling test
c) Meyer’s test d) Ninhydrin test
28) A peptide having molar mass up to 10000 is called poly peptide while a poly peptide having molar mass more than 10000 is called
a) Protein
b) Essential amino acids
c) Non essential amino acids
d) Acidic amino acid
29) On heating ammonium acetate yields
a) Acetic acid b) Acetamide
c) Ether d) Amino acid
30) A carboxylic acid contains
a) Hydroxyl group
b) Carboxyl group
c) A hydroxyl group and carboxyl group
d) A carboxyl group and aldehydic group
31) Long chain mono carboxylic acid are called
________
a) Aliphatic acid b) Aromatic acid
c) Cyclo carboxylic acid d) None of these
32) Common name of 1, 3 Propanedioic acid is
a) Succinic acid b) Oxalic acid
c) Melonic acid d) Phthalic acid
33) Vinegar is
a) 5% solution of acetic acid in H2O
b) 50% solution of acetic acid in H2O
c) 25% solution of acetic acid in H2O
d) 10% solution of acetic acid in H2O
34) Succinic acid contain total carbon atoms
a) 4 b) 5
c) 3 d) 2
35) Carboxylic acid can be prepared from
a) Alcohol b) Ester
c) Grignard’s reagent d) All
36) In industrial preparation of Acetic Acid from acetaldehyde manganous acetate is used as
a) Catalyst
b) Oxidizing agent
c) To prevent oxidation of Acetic acid into
peracetic acid
d) All above
37) Which one is not the derivative of carboxylic
acid?
a) Acid Halid b) Amino acid
c) Enthanamide d) Acid amide
38) In carboxylic acid carbonyl carbon is
hydridized
a) SP3 b) SP2
c) SP d) None
39) Which one of the following will increase the
acidity of carboxylic acid?
a) OH b) NO2
c) – CN d) Both b & c
40) Which one will decrease the acidity of
carboxylic acid?
a) OH b) NH2
c) Alkyl group d) All
41) Which one is less acidic?
a) CH2 – COOH
│
Cl
b) Cl2 – CH – COOH
c) CH3 – COOH
d) Cl3.C.COOH
42) Which one is more acidic?
a) HCOOH b) CH3COOH
c) C2H4 – COOH d) C2H7 – COOH
43) Which have higher B.P?
a) CH3COOH b) CH3-CH2-CH2-OH
c) CH3O – C2H5 d) Both a & c
44) Carboxylic ion is represented by how many
resonating structure?
a) 3 b) 2
c) 1 d) 4
45) Higher B.P of carboxylic acid as compared to
alcohol of the same m.wt is due to
a) Strong dispersion ferces
b) Strong dipole dipole interaction
c) Two H – bonding per molecule
d) All of these
46) The greater acidity of carboxylic acid as
compared to alcohol is
a) Electron donating effect of – OH group
b) Electron with drawing effect of COOH gp
c) Resonance stability of carboxylic ion
d) All
47) Which of the following compounds on reaction
with NaHCO3 liberates CO2?
a) C2H5 – OH b) CH3 – O – CH3
c) CH3COOH d) CH3CONH2
48) Acetic acid on reduction with LiAlH4 gives
a) Ethane b) Ethanal
c) Ethanol d) Ethyone
49) Acetic acid undergo dehydration reaction with
P2O5 and forms.
a) Methyl acetate b) Butanoic acid
c) Acetic anhydride d) Acetaldehyde
50) A compound undergo reduction with (LiAlH4) it
also dissolve in aq.NaOH from which it can be
recovered by addition of HCl the compound in
a) Carboxylic acid b) An ester
c) An alcohol d) Acid anhydride
51) The solution of which acid is used for
seasoning of food?
a) Formic acid b) Benzoic acid
c) Acetic acid d) Butanoic acid
52) Acetamide is prepared by
a) Heating of ammonium acetate
b) Heating of Ethyl acetate
c) Amonium propionate
d) None
53) R – CH – COO- is called
│
NH3
a) Zwitter ion b) Dipolar ionic form
c) Internal salt d) All
54) Amino acids are the building unit of protein the
linkage b/w Amino acid molecules is called
a) Glycosidic linkage b) Peptide linkage
c) Ether linkage d) All above
55) Which of the following is not a fatty acid?
a) Acetic acid b) Propionic acid
c) Phthalic acid d) Butanoic acid
56) Total number of amino acids are
a) 10 b) 20
c) 30 d) 40
57) Total number of essential amino acids
a) 10 b) 20
c) – 30 d) – 40
58) NH2
│
R – CH – COO- is called
a) α Amino acid b) β amino acid
c) γ amino acid d) None
59) The acid produced in the sting of bees and
ants is
a) Acetic acid b) Formic acid
c) Carbonic acid d) Oxalic acid
60) The conversion of acetic acid to methane is an
example of
a) Hydration b) Dehydration
c) Decarboxyletion d) Oxidation
61) Which class of compound is commonly used
for the artificial flavouring in jams?
a) Aldehyde b) Ester
c) Carboxylic acid d) Ketones
62) CH3 – CH – COO- is called
│
NH2
a) Valine b) Glycine
c) Alanine d) Proline
63) Which of the following is not an Amino acid?
a) Alanine b) Aniline
c) Glyine d) Aspartic acid
64) Ethyl acetate can be prepared by the action of
_______ on carboxylic acid, in the presence of
acidic media.
a) Phenols b) Formalin
c) Pyradine d) Alcohol
65) Which of the following carboxylic acid is the
strongest?
a) CHF2 – CH2 – CH2 – COOH
b) CH3CH2CF2COOH
c) CH2F – CHF – CH2 – COOH
d) CH3CH2CH2COOH
66) Which of the following will serve as the basis
for simple chemical test to distinguish between
CH3CH2COOH and CH3COOHCH3?
a) Conc. H2SO4 b) Conc. HNO3
c) CrO3 │H2SO4 d) NaHCO3 │H2O
67) The IUPAC nomenclature of C6H5CH =
CHCOOH is
a) 3 – Phenyl prop – 2 – enoic acid
b) Cinnamic acid
c) Phenyl acrylic acid
d) 1 – Phynyl – 2 – ethylene carboxylic acid
68) Which of the following carboxylic acids has the
largest acidity constant, Ka?
a) CH3COOH b) ClCH2COOH
c) Cl2CHCOOH d) Cl3CCOOH
69) Which of the following is not a primary amine?
a) Cyclohexylamine b) 3 – hexylamine
c) 1 – Butylamine d) Diethylamine
70) Which statement about the reaction of
1 – bromobutane and NH3 is incorrect?
a) The reaction specifically gives a primary
amine
b) The reaction is a nucleophilic substitution
c) The reaction initially gives a primary amine
d) The reaction may lead to the formation of a
quaternary ammonium salt.
71) 2 – Bromopentanoic acid can be obtained by
a) Pentanoic acid + Br2
b) Pentanoic acid + Br2
c) Pentanoic acid + HBr
d) Pentanoic acid + HBr
72) The product obtained in the following reaction
is CH3CH2COOH ?
a) CH3CHBrCOOH
b) BrCH2CH2COOH
c) BrCH2CHBrCOOH
d) A mixture of all the above products
73) Acetamide can be prepared by the reaction of
ammonia on
a) Ethyl acetate b) Acetyl chloride
c) Acetic anhydride d) All the above
74) The products obtained in the following reaction
are CH3COOCH3 + CH3CH2OH
a) CH3COOC2H5 + CH3OH
b) CH3CH2COOCH3 + CH3OH
c) A mixture of both the above products
d) None of the above
75) Which of the following reaction will give ethyl
propionate?
a) CH3CH2CO2H + C2H5OH
b) CH3CH2CO2H + C2H5OH
c) CH2CO2C2H5 + CH3I
d) All the above reactions
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