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CBSE

Subject

Chemistry
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NEET Chemistry : Aldehydes, Ketones and Carboxylic Acids

Multiple Choice Questions

61.

Aldehydes or ketones are treated with-bromo ester in the presence of zinc to form α-hydroxy ester followed by dehydration to form α,β-unsaturated ester.This reaction is known as:

  • Witting reaction.

  • Tischenko reaction.

  • Reformatsky reaction.

  • Crossed-cannazzaro's reaction.



62.

In the following reduction, reducing agent used is:

  • DIBAH

  • LiAlH4

  • NaAlH4

  • H2/PdBaSo4



63.

The correct structure of the stable compound which is obtained when acetophenone react with a base C2H5OH is



64.

In a set of reactions, acetic acid yielded a product D.

CH3COOH SOCl2  A anhyd. AlCl3Benzene B HCN C HOH  D

The structure of D would be



65.

The major organic product formed from the following reaction (ii) LiAlH4 (iii) H2O(i) CH3NH2 ... is



66.

HCHO reacts with CH3MgI to give:

  • CH3CH2OH

  • CH3OH

  • CH3CH2I

  • CH3I



67.

Indicate correct synthesis of carboxylic acid from organometallic compound :

  • All of the above



68.

The reaction,

C6H5CHO + CH3COOC2H5  C6H5CH = CHCOOC2H5 , is called

  • Benzoin condensation

  • Claisen condensation

  • Cannizaro's reaction

  • Perkin reaction



69.

Which one of the following reactions is called Rosenmund reaction ?

  • Aldehydes are reduced to alcohols

  • Acids are converted to acid chlorides

  • Alcohols are reduced to hydrocarbons

  • Acid chlorides are reduced to aldehydes



70.

Which among the following is strongest acid ?

  • H(ClO)O2

  • H(ClO)O3

  • H(ClO)O

  • H(ClO)



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