ORGANIC COMPOUNDS CONTAINING OXYGEN MCQs- 2

1) When glycerol is added to water, which of the following behaviours would be observed ?
a) Water will evaporate more easily
b) The temperature of water will decrease
c) The freezing point of water is lowered
d) The viscosity of water will decrease.

2) Glycerol on warming with a small amount of hydriodic acid gets converted into
a)
b)
c)
d)

3) Glycerol when treated with excess of PI3 yields
a)
b)
c)
d)

4) Which of the following reagents will not produce acrolein when heated with glycerol ?
a)
b)
c)
d) Con. HCl

5)
a)
b)
c)
d)

6) Glycerol when treated with a mixture of conc. gives
a) Glyceryl mononitrate
b) Glyceryl trinitrate
c) Glyceryl dinitrate
d) Glyceryl sulphate.

7) An organic compound X on treatment with acidified K2Cr2O7 gives a compound Y which reacts with I2 and sodium carbonate to form tri-iodomethane. The compound X is
a)
b)
c)
d)

8) Which of the following compounds is resistant to nucleophilic attack by hydroxyl ions ?
a) Methyl acetate
b) Acetonitrile
c) Acetamide
d) Diethyl ether

9) Which of the following does not give a yellow precipitate with I2+NaOH ?
a) Acetone
b) Acetaldehyde
c) Benzaldehyde
d) Acetophenone

10) The alkaline CuSO4 containing sodium potassium tartrate does not react with
a)
b)
c)
d)

11) Acetaldehyde reacts with Cl2 (in excess) to give
a) Chloral
b) Chloroform
c) Acetic acid
d) Trichloroacetic acid

12) An example of condensation polymerization is
a)
b)
c)
d)

13) –> gives as one of the products
a) Benzyl alcohol
b) Benzoic alcohol
c) Hydrobenzamide
d) Cinnamic acid

14) .The above reaction when carried out using Pd/BaSO4catolyst, is called
a) Remier Tiemann reaction
b)
c) Rosenmund reaction
d) Reformatsky reaction

15) The oxidation product of 2-propanol with chromic acid is
a) Ethanoic acid
b) Propanal
c) Propanone
d) None of these

16) The reagent that gives an orange coloured precipitate with acetaldehyde is
a)
b)
c) Iodine
d) 2,4-DNP

17) Which of the following is a methyl ketone ?
a) 3-Pentanone
b) Benzophenone
c) Benzenone
d) None of these

18) The reduction of benzoyl chloride with Pd and BaSO4 produces
a) Benzoyl cyanide
b) Benzaldehyde
c) Benzoic acid
d) None of these

19) Acetaldehyde cannot show
a) the iodoform test
b) Lucas test
c)
d)

20) Which of the following reaction can produce RCOAr ?
a)
b)
c)
d)

21) The catalyst used in Rosenmund reduction is
a)
b)
c)
d)

22) Aldehydes turn pink with
a) Benedict solution
b)
c) Fehlings solution
d) Molisch reagent

23) Which of the following does not give a yellow precipitate with I2 and NaOH?
a)
b)
c)
d)

24) Paraldehyde is a trimer of
a) Formaldehyde
b) Acetaldehyde
c) Benzaldehyde
d) Propionaldehyde

25) Acetal is obtained by reacting, in the presence of dry HCl, an alcohol with a/an
a) Aldehyde
b) Ketone
c) Ether
d) Carboxylic acid

26) Acetone can be further oxidised with
a)
b)
c) Acidic dichromate solution
d)

27) @ An organic compound X on treatment with acidified K2Cr2O7 gives a compound Y which reacts with and Na2CO3 to form tri-iodo-methane. The compound X is
a)
b)
c)
d)

28) The compound formed by the reaction of acetaldehyde with acid KMnO4 is
a)
b)
c)
d)

29) Acetone is prepared by
a) Oxidation of n-propyl alcohol
b) Pyrolysis of acetic acid
c) Oxidation of acetaldehyde
d) Pyrolysis of calcium acetate

30) Which of the following does not give a brick red precipitate with Fehlings solution ?
a) Acetone
b) Acetaldehyde
c) Formalin
d) D-glucose

31) Acetaldehyde and acetone can be distinguished by
a) Molisch test
b) Bromoform test
c) their solubility in water
d)

32) Acetophenone is prepared by the reaction of which of the following in the presence of AlCl3 catalyst ?
a) Phenol and acetic acid
b) Benzene and acetone
c) Benzene and acetyl chloride
d) Phenol and acetone

33) When two molecules of acetaldehyde condense in the presence of dilute alkali, it forms
a) Acetal
b) Sodium formate
c) Aldol
d) Mesitylene

34) The reaction is called
a) PerkinÂ’s reaction
b) Claisen condensation
c) Benzoin condensation
d) CannizzaroÂ’s reaction

35) A compound A on oxidation gave acetaldehyde, then again on oxidation gave an acid. After first oxidation it was reacted with ammonical AgNO3 and a white ppt. produced. Compound A is likely to be
a) A primary alcohol
b) A tertiary alcohol
c) Acetaldehyde
d) Acetone

36) . Here P is
a)
b)
c)
d) None of these

37) Which of the following reactions cannot be used for the reduction of ?
a) Clemmensen reduction
b) Wolf Kishner reduction
c) Wurtz reaction
d) HI/Red P at 200 degree celsius

38) Aldol condensation would not occur in
a) HCHO
b)
c)
d)

39) An organic compound C3H6O does not give a precipitate with 2,4-Dinitrophenyl hydrazine and does not react with metallic sodium. It could be
a)
b)
c)
d)

40) Reduction with aluminium isopropoxide in excess of isopropyl alcohol is called Meerwein – Ponndroff – Verley reduction (MPV).What will be the final product when cyclohex-2-enone is selectively reduced in the MPV reaction?
a) Cyclohexanol
b) Cyclohex-2-enol
c) Cyclohexanone
d) Benzene

41) The reductive ozonolysis of benzene gives
a) Acetone
b) Maleic anhydride
c) Phthalic acid
d) Glyoxal

42) Ketones (R1COR2),where R1=R2=alkyl group, can be obtained in one step by the
a) Hydrolysis of esters
b) Oxidation of primary alcohols
c) Oxidation of secondary alcohols
d) Reaction of acid halides and alcohols

43) In the presence of aluminium ethoxide, aldehydes are converted into esters.The reaction is called
a) Schmidt reaction
b) Aldol condensation
c)
d) Tischenko reaction

44) A compound possessing , in the presence of dilute alkali forms . This compound could be
a)
b)
c)
d)

45) Lacrimator or tear gas is
a)
b)
c)
d)

46) The cyanohydrin of which of the following forms lactic acid on hydrolysis ?
a)
b) HCHO
c)
d)

47) Among the following components the most susceptible to nucleophilic attack at the carbonyl group is
a) MeCOCl
b) MeCONH2
c) MeCOOMe
d) MeCO-O-COMe

48) Which of the following compounds does not react with NaHSO3 ?
a)
b)
c)
d)

49) Reduction of aldehydes with HI gives
a) Primary alcohols
b) Secondary alcohols
c) Alkanes
d) Tertiary alcohols

50) Benzaldehyde reacts with methyl amine to give
a)
b)
c)
d)

51) Which of the following aldehyde can give Cannizzaros reaction with a base?
a)
b)
c)
d)

52) In nucleophilic attack at the carbonyl carbon, the reactivity of carbonyl compounds follows the order
a)
b)
c)
d)

53) Aromatic aldehydes in the presence of cyanide ion as catalyst, are converted to acyloins. This reaction is called
a)
b)
c) Benzoin condensation
d) Claisen condensation

54) The reaction in which cyanide is used is
a)
b) Reimer Tiemann reaction
c) Benzoin condensation
d) Rosenmund reaction

55) Under Wolf Kishner reduction conditions, the conversion which may be brought about is
a) Benzaldehyde into benzyl alcohol
b) Cyclohexanol into cyclohexane
c) Cyclohexanone into Cyclohexanol
d) Benzophenone into diphenyl methane

56) Which reaction yields bakelite ?
a) Urea with HCl
b) Tetramethyl glycol with hexamethylene-disocyanate
c) Phenol with HCHO
d) Ethylene glycol and dimethyl tetraphthalate

57) Fehling solution is a mixture of two solutions. While one solution contains CuSO4 , the other solution contains ,
a)
b)
c)
d)

58) Formalin is an aqueous solution of
a) Furfural
b) Fluorescein
c) Formaldehyde
d) Formic acid

59) The hybridisation of carbon in –CHO group is
a) sp
b)
c)
d) None

60) The carbonyl group undergoes
a) Electrophilic addition reactions
b) Nucleophilic addition reactions
c) Both
d) None

61) . Here Y is
a) Formic acid
b) Cinnamic acid
c) Acetic acid
d) Lactic acid

62) . Here Z is
a) Ethane
b) Ethyl bromide
c) Ethylidene bromide
d) Ethylene bromide

63) Which of the following is most reactive for nucleophilic attack at the carbonyl group?
a)
b)
c) HCHO
d)

64) Which of the following is least reactive for nucleophilic attack at the carbonyl group?
a) HCHO
b)
c)
d)

65) Methylene chloride on hydrolysis yields
a) HCHO
b)
c)
d) None

66) The reduction of an aldehyde or ketone in the presence of aluminium isopropoxide [[(CH3)2CHO]3Al] to give the corresponding alcohols is called the
a) Rosenmund reaction
b) Wurtz fitting reaction
c) Meerwein Ponndorf-Verley reaction
d) None

67) The polarisation of electrons in acrolein may be written as
a)
b) None of the above
c)
d)

68) The vapour density of a compound is 29. It reacts with iodine and NaOH to form a yellow compound. The compound is
a)
b)
c)
d)

69) The partial oxidation of methane gives, in the first stage,
a) HCHO
b) HCOOH
c)
d)

70) Ethanol vapour is passed over heated copper at 300oC and the product is treated with aqueous NaOH. The final product is
a) Acetone
b) beta-hydroxy butyraldehyde
c) Both
d) None

71) Formaldehyde polymerises from 6 to 100 molecules to form
a) Formalin
b) Metaldehyde
c) Paraformaldehyde
d) None

72) Which of the following ketone will not give the iodoform test ?
a) Methyl isopropyl ketone
b) Ethyl isopropyl ketone
c) Dimethyl ketone
d) 2-hexanone

73) Mesitylene, obtained by treating acetone with conc. H2SO4 is
a)
b)
c) 1,3,5 trimethyl benzene
d) None

74) Which of the following compounds will give a ketone on oxidation ?
a)
b)
c)
d)

75) Ethylidene chloride (CH3CHCl2) on hydrolysis with NaOH gives
a)
b)
c)
d)

76) Which of the following gives a positive haloform test and a positive Fehling solution test ?
a) Acetone
b) Acetaldehyde
c) Ethanol
d) Formaldehyde

77) The molecular formula of chlorinated acetone produced in the distillation with bleaching powder is
a)
b)
c)
d)

78) Aldehydes and ketones both react with
a) Fehling solution
b) Grignard reagent
c)
d)

79) Which of the following reagents reacts to give addition products with C6H5CHO,CH3CHO and CH3COCH3 ?
a) HCN
b)
c)
d) All

80) Ethanal reacts with alkali to give 3-hydroxybutanal. The reaction is
a) Polymerisation
b) Claisen condensation
c) Aldol condensation
d) Reimer Tiemman reaction

81) Which of the following combinations give t-butyl alcohol when treated with Grignard reagent ?
a)
b)
c)
d)

82) The alkene which on ozonolysis yields acetone is
a)
b)
c)
d)

83) Which of the following will not reduce Fehlings solution ?
a) Formic acid
b) Ethanal
c) 2-methyl propanal
d) Acetic acid

84) When calcium formate is dry heated, it forms
a) HCHO
b) HCOOH
c)
d)

85) Which of the following does not react with NaHSO3 ?
a) HCHO
b)
c)
d)

86) An olefin X on ozonolysis gives C2H5CHO and HCHO. The olefin is
a) But-1-ene
b) But-2-ene
c) Pent-1-ene
d) Pent-2-ene

87) An organic compound contains hydrogen and oxygen and a single carbon atom and responds positively to Tollens reagent. The compound is
a) HCHO
b)
c)
d) None

88) The class of compounds that are reduced to primary alcohols and also respond to FehlingÂ’s solution are
a) Aliphatic aldehydes
b) Aliphatic ketones
c) Aromatic amines
d) Aromatic ketones

89) Acetaldehyde on oxidation with SeO2 gives
a)
b)
c)
d) None

90) When propyne is heated with dilute H2SO4 in presence of HgSO4, the major product is
a) Propanal
b) Propanoic acid
c) Acetone
d)

91)
a) Acetaldehyde
b) Propionaldehyde
c) Acetone
d) Acetic anhydride

92) Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH4 or LiAlH4 ?
a) 1-propanol
b) 2-propanol
c) 2-methyl-2-propanol
d) Ethanol

93) Which of the following does not form addition compounds with ammonia ?
a) HCHO
b)
c)
d) None

94) Methyl ketones can be identified with
a)
b)
c)
d)

95) Formaldehyde gives an addition product with methyl magnesium iodide which on aqueous hydrolysis gives
a)
b)
c)
d)

96) One mole of an organic compound requires 0.5 mole of oxygen to produce an acid. The compound may be
a) Alcohol
b) Ether
c) Ketone
d) Aldehyde

97) The molecular formula of an organic compound is C2HCl3O.It forms addition product with sodium bisulphate and yields chloroform when warmed with caustic soda solution. The compound is
a)
b)
c)
d) None

98) A typical compound undergoes CannizzaroÂ’s reaction as well as aldol condensation. The possible compound is
a)
b)
c)
d) HCHO

99) The oxidation of acetaldehyde in the presence of manganese acetate gives
a)
b)
c)
d)

100) The decreasing order of boiling points of CH3CH2CHO, CH3CH2CH2OH, CH3OCH2CH3 and CH3CH2CH3 is
a)
b)
c)
d) None


Answer

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