ORGANIC COMPOUNDS CONTAINING OXYGEN MCQs- 4

1) Which of the following is a polyprotic acid?
a) Acetic acid
b) Benzoic acid
c) P-nitrobenzoic acid
d) Oxalic acid

2) The strongest acid among the following is
a) Oxalic acid
b) Malonic acid
c) Succinic acid
d) Adipic acid

3) Phenol can be distinguished from acetic acid by
a) Blue litmus test
b) Sodium bisulphite test
c) FeCl3 solution
d)

4) Carboxylic acids do not give nucleophilic addition reactions characteristic of aldehydes and ketones even though they contain a group. It is because of their
a) Acidic character
b) Resonance
c) Dimeric structure
d) + l-Effect of the alkyl groups

5) The compound which does not react with hydroxylamine is
a)
b)
c)
d) HCHO

6) Which of the following acids combines the properties of an aldehyde and an acid?
a) Benzoic acid
b) Acetic acid
c) Formic acid
d) Oxalic acid

7) In which of the following reactions formic acid differs from acetic acid?
a)
b) Turns blue litmus red
c) Forms esters with alcohols
d) Reduces ammoniacal silver nitrate

8) Which of the following reduces Fehlings solution?
a) Acetic acid
b) Formic acid
c) Benzoic acid
d) Acetone

9) Formic acid can be distinguished from acetic acid by reaction with
a)
b)
c) 2, 4-Dinitrophenylhydrazine
d) Na metal

10) Tollens reagent is not reduced by
a) Formic acid
b) Acetaldehyde
c) Benzaldehyde
d) Acetic acid

11) Mercuric chloride is reduced to mercurous chloride by
a) Acetic acid
b) Carbon tetrachloride
c) Formic acid
d) Ammonia

12) Formic acid reacts with PCl5 to form
a) Acetyl chloride
b) Methyl chloride
c) Carbon monoxide and hydrogen chloride
d) Formyl chloride

13) The Hell-Volhard Zelinsky reaction is used for preparing a/an
a)
b)
c) Acid halide
d)

14) When excess of chlorine is passed through acetic acid in presence of red phosphorus, it forms
a) Acetyl chloride
b) Chloral
c) Trichloroacetic acid
d) Methyl chloride

15) When propionic acid is treated with Br2 in the presence of red phosphorus, the product obtained is
a)
b)
c)
d)

16) Which of the following acids undergoes Hell-Volhard Zelinsky reaction?
a)
b)
c)
d)

17) The carboxylic acid which does not undergo the Hell-Volhard Zelinsky reaction is
a)
b)
c)
d)

18) Which of the following will not undergo the Hell-Volhard Zelinsky (HVZ) reaction?
a) HCOOH
b)
c)
d)

19) In the-halogenation of aliphatic acids, the reagent used along with the halogen is
a)
b)
c) Raney Ni
d) Red P

20) Identify Z in the following reaction sequence


a)
b)
c)
d)

21) The reagent used to convert RCOOH RCH2OH is
a)
b) Na/Alcohol
c) Zn/Hg—HC
d)

22) When benzoic acid is treated with LiAIH4, it forms
a) Benzaldehyde
b) Benzyl alcohol
c) Benzene
d) Toluene

23) Ethyl alcohol can be obtained in one step from acetic acid by reduction with
a) Zinc and acetic acid
b) Lithium aluminium hydride
c) HI and red phosphorus
d) Nickel and hydrogen

24) Decarboxylation of sodium propionate leads to the formation of
a) Methane
b) Ethene
c) Propanone
d) Ethane

25) Kolbes electrolysis of aqueous potassium ethanoate leads to the formation of
a) Ethene
b) Methane
c) Ethane
d) Ethyne

26) When sodium formate is heated with soda-lime, it forms
a) Hydrogen
b) Ethylene
c) Ethane
d) Methane

27) Propanoic acid or its sodium salt can be converted into alkanes by reduction with HI / red P or decarboxylation with soda-lime or Kolbes electrolytic reaction. Which of the following alkanes is not formed in any of these reactions?
a) Methane
b) Ethane
c) Propane
d) Butane

28) The compound which does not form an alkane when subjected to electrolysis is
a) Sodium acetate
b) Sodium formate
c) Sodium propanoate
d) Sodium butanoate

29) Silver benzoate when treated with bromine in refluxing carbon tetrachloride gives
a) Bromobenzene
b) Benzoyl bromide
c) Benzyl bromide
d) Benzoic anhydride

30) Silver acetate when refluxed with Br2 in CCl4 gives
a)
b)
c)
d)

31) The reaction: is called
a) Wurtz reaction
b) Hunsdiecker reaction
c) Friedel-Crafts raction
d)

32) When a bee bites, it mainly injects the following into the body.
a) Formic acid
b) Acetic acid
c) Carbonic acid
d) Hydrochloric acid

33) What makes a lemon sour?
a) Tartaric acid
b) Oxalic acid
c) Citric acid
d) Hydrochloric acid

34) Tamarind contains
a) (+)— Tartaric acid
b) (—) — Tartaric acid
c)
d) Citric acid

35) Which of the following is a constituent of baking powder?
a) Citric acid
b) Cream of tartar
c) Acetic acid
d) Formic acid

36) Vinegar contains
a) 10-20% Acetic acid
b) 50% Acetic acid
c) 7—8% Acetic acid
d) 100% Acetic acid

37) Which one of the following reagents does not react with acetic acid to form acetyl chloride?
a)
b)
c)
d)

38) The reaction between diethylcadmium and acetyl chloride gives
a) Dimethyl ketone
b) Diethyl ketone
c) Ethyl methyl ketone
d) Acetaldehyde

39) Aldehydes can be prepared from acid chlorides by the
a) Clemmensen reduction
b) Wolff-Kishner reduction
c)
d)

40) In Rosenmunds reduction, the reducing agent used is
a)
b)
c) Zn—Cu couple and alcohol
d) Zn/Hg amalgam + conc. HCI

41) Acetophenone can be prepared by the Friedel Crafts reaction between benzene and
a) Benzoyl chloride
b) Benzyl chloride
c) Ethanoyl chloride
d) Methanoyl chloride

42) Acetic anhydride is obtained by the reaction of
a) Sodium and acetic acid
b) Water and acetic acid
c) Ethanol and acetic acid
d)

43) Acetic anhydride is prepared in the laboratory by heating sodium acetate with
a) Ethyl chloride
b) Acetyl chloride
c)
d) Zinc dust

44) Acetic anhydride is employed for the detection and estimation of the
a) — OH group
b) — COOH group
c) — OHO group
d)

45) A compound with the molecular formula C4H10O4 on acylation with acetic anhydride gives a compound with the molecular formula, C12H18O8. How many hydroxyl groups are present in the compound?
a) One
b) Two
c) Three
d) Four

46) What product(s) would be formed when acetic anhydride reacts with excess of ammonia?
a)
b)
c)
d)

47) An anhydride, RCOOCOR on reduction with LiAIH4 will give
a)
b)
c)
d)

48) Methyl ethanoate is represented by the structural formula
a)
b)
c)
d)

49) Which of the following is not an isomer of ethyl ethanoate?
a) Butanoic acid
b) Methyl propanoate
c) n-Propyl formate
d) n-Butyl methanoate

50) Silver acetate when treated with 2-bromo propane would yield
a)
b)
c)
d)

51) The synthesis of an ester involves the reaction of alcohols with
a) A ketone
b) An amide
c)
d) RCOCI

52) It is difficult to esterify R3C – COOH because of
a) Steric hindrance
b) Delocalization
c) Inductive effect of the R groups
d) Hyperconjugation of the alkyl groups

53) Which of the following alcohols will be esterified least readily by acetic acid in the presence of a trace of conc. H2SO4?
a)
b)
c)
d)

54) Diazomethane reacts with carboxylic acid to form
a) Amines
b) Methyl esters
c) Alcohols
d) Aldehydes

55) Which of the following compounds cannot have intermolecular hydrogen bonding?
a)
b)
c)
d)

56) The reaction,
is called
a) Esterification
b) Trans-esterification
c) Saponification
d) Hydrolysis

57) CH3CH2 – COOCH2CH3 when boiled with sodium hydroxide solution would yield
a)
b)
c)
d)

58) Self condensation of two moles of ethyl acetate in the presence of sodium ethoxide after acidification yields
a) Acetoacetic ester
b) Acetic acid
c) Ethyl propionate
d) Ethyl butyrate

59) Maximum keto-enol tautomerism is shown by
a)
b)
c)
d)

60) The most appropriate reagent to convert RCOOEt RCH2OH is
a)
b)
c)
d)

61) An ester R – COOR on catalytic hydrogenation in the presence of cupric oxide and copper chromite gives
a)
b)
c)
d)

62) Ethyl propanoate on reduction with LiAlH4 gives
a)
b)
c)
d)

63) The reaction,

is called
a) Acidification reaction
b) Dehydration reaction
c) Dehydrogenation reaction
d) Esterification reaction

64) Which reagent will bring about the conversion of carboxylic acids into esters?
a) Na+C2H5OH
b)
c)
d)

65) The fatty acid which shows a reducing property is
a) Acetic acid
b) Ethanoic acid
c) Fumeric acid
d) Formic acid

66) The hydrolytic reaction of fats with caustic soda is known as
a) Acetylation
b) Carboxylation
c) Esterification
d) Saponification

67) Which of the following gives the correct order of relative strengths of acids?
a)
b)
c)
d)

68) A fruity smell is produced by the reaction of C2H5OH with
a)
b)
c)
d) None of these

69) Carbonation of methylmagnesium bromide gives an organic compound. This compound is also obtained by
a) Hydrolysis of acetonitrile by a mineral acid
b) Oxidation of methyl alcohol
c) Hydrolysis of methyl isocyanide with a mineral acid
d) Hydrolysis of methyl formate with dilute mineral acid

70) The correct order with regard to ease of esterification of the following alcohols

CH3CH2OH (I), (CH3)2CHOH (II)

(CH3)3COH (III) with HCOOH is
a) I < II < III
b) III < II < I
c) II < I < III
d) I = II = III

71) The ease of esterification of the following acids
HCOOH (I), CH3COOH (II), CH3CH2COOH (III) with CH3OH is
a) III < II < I
b) I < II < III
c) II < I < III
d) I = II = III

72) Consider the following reaction sequence :

A and B respectively are
a)
b)
c)
d) All are correct

73) When the degree of dissociation of benzoic acid,salicylic acid and 2, 6- dihydroxybenzoic acid is compared, it will be found that the degree of dissociation of
a) benzoic acid is the highest
b) salicylic acid is the highest
c) 2, 6-dihydroxybenzoic acid is the highest
d) 2, 6-dihydroxybenzoic acid is roughly equivalent to benzoic acid

74) Which of the following: (i) Propionic acid; (ii) Picric acid; (iii) p-Toluene sulphonic acid contain a carbonyl group?
a) (i) only
b) (i) and (ii)
c) (i) and (iii)
d) (i), (ii), (iii)

75) Which of the following on oxidation with alkaline KMnO4 followed by acidification with HCI gives benzoic acid
a) Toluene alone
b) Ethylbenzene alone
c) Both a and b
d) p-Xylene alone

76) Phenol and benzoic acid may be distinguished by their reaction with
a) Aqueous NaOH alone
b) alone
c) alone
d) Both b and c

77) Optical activity is expected for
a) 2-Methylpropanoic acid
b) 2-Chloropropanoic acid
c) Both b and d
d) Methyl 2-chloropropanoate

78) Which of the following statement is false about HCOOH ?
a)
b)
c)
d)

79) Which of the following is not an ambident nucleophile?
a) -ONO
b) -CN
c)
d)

80) The formation of phthalic acid from naphthalene is catalyzed by
a) HgSO4

b) PbSO4

c) CdSO4

d) NiSO4


Answer

 

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