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CBSE

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Chemistry
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NEET Chemistry : Aldehydes, Ketones and Carboxylic Acids

Multiple Choice Questions

111.

In a set of reactions, acetic acid yielded a product S,

CH3COOH SOCl2 P  Anhy. AlCl3Benzene Q HCN R HOHS

The structure of S would be



112.

Which of the following can exhibit keto-enol tautomerism ?

  • H-CO||-H

  • (CH3)3C-CO||-H

  • CH3-CO||-H

  • CCl3-CO||-H



113.

Aldehyde which is formed during photosynthesis of plants is :

  • methanal

  • acetaldehyde

  • propanal

  • phenylmethanal



114.

The IUPAC name for the formula :

 is :

  • 2-methyl-2-butenoic acid

  • 3-methyl-3-butenoic acid

  • 3-metyl-2-butenoic acid

  • 2-methyl-3-butenoic acid



115.

CH3COOC2H5 with excess of C2H5MgBr and hydrolysis gives :

  • C2H5-C(CH3)=O

  • (C2H5)2-C(CH3)-OH

  • (CH3)2-C=O

  • (CH3)2-C(C2H5)-OH



116.

What is the product B in the following reaction sequence ?

CH3-CO||-CH3 KCN / H2SO4 A LiAlH4 B

  • (CH3)2-C(OH)-COOH

  • (CH3)2-C(OH)-CH2NH2

  • (CH3)2-CH-CN



117.

CH3CHO + CH3CHO Dil OH- CH3CH(OH)CH2CHO , the intermediate in the above reaction is :

  • carbanion

  • carbonium ion

  • carbene

  • None of these



118.

Which of the following cannot reduce Fehling solution ?

  • HCOOH

  • H3CCOOH

  • HCHO

  • H3CCHO



119.

Which of the following compounds is resistant to nucleophilic attack by hydroxyl ion ?

  • Methylacetate

  • Acetonitrile

  • Acetamide

  • Diethyl ether



120.

Assertion : (CH3)3CCOOH does not give HVZ reaction.

Reason: (CH3)3CCOOH does not have α-hydrogen atom.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.



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