Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Which one of the following gives, on ozonolysis, both aldehydes and ketones?

  • Me2C = CHMe

  • Me2C = CMe2

  • MeCH2 - C(Me) = CMe2

  • MeCH(Me) - CH = CHMe


32.

Benzoylation of phenol in alkaline medium is known as

  • Friedel-Craft's reaction

  • Wurtz-Fittig reaction

  • Schotten-Baumann reaction

  • Sabatier Senderens reduction


33.

Which one of the following compounds is most reactive towards nucleophilic addition?

  • CH3CHO

  • PhCOCH3

  • PhCOPh

  • CH3COCH3


34.

Distillation of acetone with concentrated sulphuric acid gives

  • diacetone alcohol

  • mesityl oxide

  • mesitylene 

  • propene-2-ol


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35.

RCH2CH2OH can be converted to RCH2CH2COOH by the following sequence of steps

  • PBr3, KCN , H3O+

  • PBr3, KCN, H2/P+

  • KCN, H3O+

  • HCN, PBr3, H3O+


36.

Formation of cyanohydrin from a ketone is an example of

  • electrophilic addition

  • nucleophilic substitution

  • nucleophilic addition

  • electrophilic substitution


37.

How many primary amines are possible with the formula C4H11N?

  • 1

  • 2

  • 3

  • 4


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38.

Which of the following will produce only one product on reduction with LiAlH4?

  • CH3OCOCH2CH3

  • CH3CH2OCOCH2CH3

  • CH3CH2OCOCH3

  • CH3CH2OCOCH2CH2CH3


A.

CH3OCOCH2CH3

Only ethyl acetate undergoes reduction with LiAlH4 to give only ethyl alcohol, other esters given in option on reduction gives a mixture of alcohols.

CH3COOCH2CH3 + 2H2 etherLiAlH4 2CH3CH2OH


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39.

Which one of the following pairs gives effervescence with aqueous NaHCO3?

I. CH3COCl

II. CH3COCH3

III. CH3COOCH3

IV. CH3COOCOCH3

  • I and III

  • I and IV

  • II and III

  • I and III


40.

A tripeptide is written as glycine-alanine -glycine. The correct structure of the tripeptide is


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