MCQ’S Based on : Aldehydes, Ketones and
Haloalkanes
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Q01.
The general molecular formula of aldehydes and ketones is
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1)
CnH2n-1.O
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2)
CnH2nO
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3)
CnH2n+2O
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4)
CnH2n+4O
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Q02.
Aldehyde functional group can occur
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1)
Any where in the carbon chain
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2)
In the middle of the carbon chain
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3)
Only at the second carbon atom
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4)
only at either end carbon atom of the chain
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Q03.
Propan-2-ol on treatment with copper at 3000c forms
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1)
Acetone
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2)
Acetaldehyde
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3)
Ethane
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4)
Both 1 and 2
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Q04.
Which of the following is correct?
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1)
Aldehydes undergo Cannizzaro’s reaction
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2)
Aldehydes are less susceptible to oxidation than ketones
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3)
Aldehydes are more susceptible to oxidation than ketones
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4)
Formaldehyde forms CuO with Fehling’s solution
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Q05.
IUPAC name of CH3CHOHCH2CHO is
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1)
2-hydroxybutanal
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2)
2-hydroxypropanal
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3)
3-hydroxybutanal
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4)
b-hydroxybutanal
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Q06.
The reagent which can be used to distinguish acetophenone from benzophenone
is
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1)
2, 4-dinitrophenyl hydrazine
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2)
Benedict’s solution
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3)
Tollen’s reagent
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4)
I2 and Na2CO3
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Q07.
Toluene on reacting with chromyl chloride gives:
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1)
Chlorotoluene
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2)
Benzyl chloride
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3)
Benzaldehyde
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4)
Benzoic acid
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Q08.
Mesitylene is prepared from
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1)
CH3CHO and conc. HNO3
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2)
CH3COCH3 and conc. H2SO4
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3)
CH3COCH3 and conc. HCl
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4)
CH3CHO and conc. H2SO4
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Q09.
(CH3)2C = CHCOCH3 can be oxidised to (CH3)2C = CHCOOH by
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1)
Chromic acid
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2)
NaOI
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3)
Cu at 3000c
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4)
KMNO4
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Q10.
Oppenaur oxidation is the reverse process of
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1)
Wolff –Kishner reduction
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2)
Rosenmund’s reduction
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3)
Clemmensen reduction
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4)
Meerwein-Pondorf-Verely reduction
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Q11.
In the reaction CH3CHO + CH2(COOH)2 ----------pyridine/heat
------->A. The compound A is
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1)
CH3COOH
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2)
C2H5COOH
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3)
CH3CH = CHCOOH
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4)
COOHCH = CHCOOH
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Q12.
Benzaldehyde reacts with alcoholic KCN to give:
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1)
C6H5CH(OH)CN
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2)
C6H5CH(OH)COC6H5
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3)
C6H5CH(OH)COOH
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4)
C6H5CH(OH)CH(OH)C6H5
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Q13.
Aldehydes and ketones do not react with
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1)
sodium bisulphite
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2)
phenyl hydrazine
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3)
semi carbazide
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4)
di hydrazine sodium phosphate
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Q14.
Which of the following will undergo aldol condensation?
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1)
CH2=CHCHO
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2)
CH=CCHO
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3)
C6H5CHO
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4)
CH3CH2CHO
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Q15.
Which type of isomerism is shown by the pentanone
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1)
Chain isomerism
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2)
Position isomerism
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3)
Functional isomerism
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4)
All 1, 2 and 3
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Q16.
Paraldehyde is formed as a result of polymerisation of
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1)
CH3CHO
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2)
HCHO
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3)
CH3OH
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4)
CH3CH2CHO
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Q17.
Aromatic aldehydes in the presence of CN- ion give acyloins. The reaction is known as
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1)
Perkin reaction
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2)
Benzoin condensation
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3)
Claisen condensation
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4)
Cannizzaro’s reaction
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Q18.
Which of the following method is used to convert ketone into hydrocarbon
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1)
aldol condensation
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2)
Reimer Tieman reaction
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3)
Cannizzaro’s reaction
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4)
Clemmensen’s reduction
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Q19.
Which will not give formaldehyde on heating or upon distillation?
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1)
Formalin
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2)
Trioxane
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3)
Paraldehyde 4) Paraformaldehyde
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Q20.
When ethanal is heated with Fehling’s solution it gives a precipitate of
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1)
Cu
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2)
CuO
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3)
Cu2O
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4)
CuO+Cu2O+Cu
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Q21.
When CH3CHBrCH2CH3 is reacted with alcoholic KOH the major product is
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1)
CH3CH=CHCH3
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2)
CH2=CHCH2CH3
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3)
CH3CH(OH)CH2CH3
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4)
CH3CH2CH2CH3
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Q22.
Benzene reacts with n-propyl chloride in the presence of anhydrous AlCl3 to
give
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1)
3-propyl-1-chlorobenzene
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2)
n-propyl benzene
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3)
No action
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4)
Isopropyl benzene
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Q23.
Identify Z in the following series:
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CH2=CH2
-----HBr---> X ------Hydrolysis ----> Y -----I2 / excess NaOH
----> Z
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1)
C2H5I
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2)
C2H5OH
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3)
CHI3
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4)
CH3CHO
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Q24.
Bromoethane reacts with silver nitrite to form
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1)
Nitroethane
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2)
Ethane
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3)
Ethylnitrite
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4)
Nitroethane and ethylnitrite
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Q25.
Which of the following compounds on oxidation gives benzoic acid?
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1)
o-Chlorophenol
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2)
p-Chlorotoluene
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3)
Chlorobenzene
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4)
Benzyl chloride
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Q26.
Reaction between alkyl halide and sodium metal is called
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1)
Wurtz reaction
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2)
Kolbe’s reaction
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3)
Clemmensen’s reaction
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4)
Wurtz - Fittig’s reaction
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Q27.
Which compound gives iodoform by reaction between I2 and NaOH?
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1)
CH3OH
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2)
C2H5OH
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3)
C3H7OH
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4)
C2H5OC2H5
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Q28.
The reactivity order of halides in dehydrohalogenation reaction is:
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1)
R-F > R-Cl > R-Br > R-I
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2)
R-I > R-Br > R-Cl > R-F
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3)
R-I >R-Cl > R-Br > R-F
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4)
R-F > R-I > R-Br > R-Cl
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Q29.
Which of the following undergoes nucleophilic substitution exclusively by SN1
mechanism?
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1)
ethyl chloride
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2)
isopropyl chloride
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3)
chlorobenzene
|
4)
benzyl chloride
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Q30.
SN2 mechanism proceeds through intervention of:
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1)
carbocation
|
2)
transition state
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3)
free radical
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4)
carbanion
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ANSWERS
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Q 01 2
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Q 11 3
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Q 21 1
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Q 02 4
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Q 12 2
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Q 22 4
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Q03 1
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Q 13 4
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Q 23 3
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Q 04 3
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Q 14 4
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Q 24 4
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Q 05 3
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Q 15 4
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Q 25 4
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Q 06 4
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Q 16 1
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Q 26 1
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Q 07 3
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Q 17 2
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Q 27 2
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Q 08 2
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Q 18 4
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Q 28 2
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Q 09 2
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Q 19 3
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Q 29 4
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Q 10 4
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Q 20 3
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Q 30 2
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