NEET Chemistry MCQ - Aldehydes, Ketones Mcq Neet Chemistry - Quiz-11 - MCQGeeks.com

Q.1

on Q301) A is

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a)
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b)
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c)
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d)

Q.2

han One Correct Answer Q302) Which of the following show(s) Cannizzaro's reaction?

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a)
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b)
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c)
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d)

Q.3

on Q303) Here P is .... [ IIT 1995]

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a)
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b)
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c)
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d) None of the above

Q.4

Acetone is prepared by

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a) oxidation of n- propyl alcohol
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b) oxidation of acetic acid
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c) pyrolysis of acetic acid
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d) pyrolysis of calcium acetate

Q.5

An organic compound 'A' has the molecular formula C3H6O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C9H14O. A and B respectively are ..

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a) Propanal and mesitylene
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b) Propanone and mesityl oxide
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c) Propanone and 2,6-dimethyl-2, 5-heptadien-4-one
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d) Proanone and mesitylene oxide

Q.6

In Tischenko's reaction an aldehyde is heated with catalyst

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a) Mg/Hg
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b) Al(OC2H5)3
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c) Al2O
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d) NaOH

Q.7

Glucose forms a silver mirror with Tollen's reagent. This shows the presence of

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a) Alcoholic group
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b) Ketonic group
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c) Aldehydic group
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d) Acidic group

Q.8

on More Than One Correct Answer Q309) In the given reaction A will

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a) A can show free radical and electrophilic substitution
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b) contains two carbonyl group
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c) is oxidised to carboxylic acid
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d) is an aromatic organic compound

Q.9

Aromatic aldehydes in the presence of cyanide on as ctalyst, are converted to acyloins. This reaction is called

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a) Claisen condensation
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b) Cannizzaro reaction
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c) Benzoin condensation
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d) Perkin reaction

Q.10

A mixture of benzenaldehyde and formaldehyde on heating with aqueous NaOH solution gives ... ... [ IIT 2001]

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a) Benzyl alcohol and sodium formate
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b) Sodium benzoate and methyl alcohol
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c) Sodium benzoate and sodium formate
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d) Benzyl alcohol and methyl alcohol

Q.11

Which of the following aldehydes can ive Cannizzaro reaction with base?

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a) CH3 - CH2 - CH2 - CHO
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b) (CH3)3C - CHO
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c) H3C - CH = CH - CHO
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d)

Q.12

Formaldehyde can be manufactured from

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a) Watergas
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b) natural gas
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c) both a and b
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d) none of these

Q.13

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

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a) Reimer Tiemann reaction
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b) Cannizzaro's reaction
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c) Wolff-Kishner reduction
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d) Aldol condensation

Q.14

Which reaction yield Bakelite

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a) Phenol and HCHO
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b) Ethylene glycol and Dimethylterephthalate
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c) Urea with HCHO
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d) Tetramethyl glycol with Hexamethylene diisocyanate

Q.15

han One Correct Answer Q316) Which of the follwoing do/does not react with Fehling's solution?

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a) Acetaldehyde
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b) Acetophenone
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c) Benzaldehyde
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d) Glucose

Q.16

Benzophenone can be converted into benzene using .... .. [ Tamil Nadu CET 2001]

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a) Fused alkali
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b) Anhydrous AlCl3
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c) Sodium amalgam in water
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d) Acidified dichromate

Q.17

Two molecules of an aldehyde react with a concentrated solution of caustic soda and produces one molecule of an alcohol and acid each, which one is the aldehyde?

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a) Propionaldehyde
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b) Butyraldehyde
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c) Acetaldehyde
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d) Formaldehyde

Q.18

A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is

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a) acetone
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b) acetaldehyde
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c) formaldehyde
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d) diethyl ketone

Q.19

Formaldehyde when treated with KOH (caustic potash) gives methanol and potassium formate, the reaction is known as ... ..[ Punjab CET 1997]

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a) Claisen's reaction
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b) Knoevenagel's reaction
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c) Cannizzaro's reaction
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d) Perkin's reaction

Q.20

Which is not true about acetophenone?

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a) Reacts to form 2,4-dinitrophenyl hydrazone
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b) reacts with Tollen's reagent to form silver mirror
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c) Racts with I2/NaOH to form iodoform
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d) On oxidation with alkaline KMnO4 followed by hydrolysis give benzoic acid

Q.21

Compound 'X' ( molecular formula C3H8O) is treated with acidified potassium dichromate to form a product 'Y' ( molecular formula C3H6O) 'Y' forms a shining silver mirror on warming with ammoniacal silver nitrate. 'Y' when treated with an aqueous solution of H2NCONHNH2 and sodium acetate gives a product 'Z'. The structure of 'Z' is ... [ IIT 2002]

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a) CH3CH2CH = NNHCONH2
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b) CH3CH2CH = NCONHNH2
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c)
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d)

Q.22

han One Correct Answer Q323) Which will form two oximes with NH2OH?

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a) CH3CHO
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b) CH3COCH2CH3
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c) HCHO
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d) CH3COCH2CH2CH3

Q.23

han One Correct Answer Q324) In which reaction(s) chiral carbon is/are generated?

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a)
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b)
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c)
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d)

Q.24

In nucleophilic addition reactions the reactivity of carbonyl compoundss follows order

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a) H2C=O >R2C=O > Ar2C = O > RCHO > ArCHO
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b) H2C=O > RCHO > ArCHO > Ar2C = O
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c) Ar2C = O > R2C=O > ArCHO > H2C=O
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d) ArCHO > Ar2C = O > RCHO > R2C=O > H2C=O

Q.25

on Q326) In Cannizzaro reaction given below the slowest step is .... [ AIEEE 2009]

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a) The attack of :OH- at the carboxyl group
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b) The transfer of hydride to the carbonyl group
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c) The abstraction of proton from the carboxylic group
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d) The deportonation of PhCH2OH

Q.26

Assertion:Hydroxyketones are not directly used in Grignard reaction. Reaction: Grignard reagents react with hydroxyl group.

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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
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c) Assertion is true but, Reason is false
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d) Assertion is false but, Reason is true

Q.27

The final product formed when acetaldehyde is reduced with sodium and alcohol is

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a) Ethane
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b) Ethyl alcohol
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c) Ethylene
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d) All

Q.28

Reductive ozonolysis of benzene produces

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a) Glyoxal
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b) Acetone
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c) Maleic anhydride
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d) Phthalic acid

Q.29

on Q330)

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a)
0%
b)
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c)
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d) None is correct

Q.30

Which one of the following compounds in treatment with LiAlH4 will give a product that will give a positive iodoform test?

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a) CH3COCH3
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b) CH3CH2CHO
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c) CH3CH2COOCH3
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d) CH3CH2OCH2CH3

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