Aldol condensation is given by from Chemistry Aldehydes, Ketones

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 Multiple Choice QuestionsMultiple Choice Questions

561.

Alkyl cyanides undergo Stephen reduction to produce

  • aldehyde

  • secondary amine

  • primary amine

  • amide


562.

Reaction of PCl3 and PhMgBr would give

  • bromobenzene

  • chlorobenzene

  • triphenylphosphine

  • dichlorobenzene


563.

Ethylene glycol gives oxalic acid on oxidation with

  • acidified K2Cr2O7

  • acidified KMnO4

  • alkaline KMnO4

  • periodic acid


564.

A Wittig reaction with an aldehyde gives

  • ketone compound

  • a long chain fatty acid

  • olefin compound

  • epoxide


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565.

Cannizaro reaction is given by

  • HCHO

  • >C(OH)COOH

  • >CHCH2CHO

  • CH3CH2OH


566.

Identify the reactant.

  • H2O

  • HCHO

  • CO

  • CH3CHO


567.

Maleic acid and fumaric acid are

  • position isomers

  • geometric isomers

  • enantiomers

  • functional isomers


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568.

Aldol condensation is given by

  • trimethylacetaldehyde

  • acetaldehyde

  • benzaldehyde

  • formaldehyde


B.

acetaldehyde

Aldol condensation is given by acetaldehyde due to the presence of α-hydrogen atom.

CH3CHO + H·CH2CHO Dil NaOH CH3- CHOH -CH2-CHO                                                                    aldol


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569.

Give the IUPAC name for

H3C-CH2-CO-H2C-CH2-CO-OCH3

  • ethyl-4-oxoheptanoate

  • methyl-4-oxoheptanoate

  • ethyl-4-oxohexanoate

  • methyl-4-oxohexanoate


570.

The catalyst used in Rosenmund reaction is :

  • Zn/ Hg

  • Pd / BaSO4

  • Raney Ni

  • Na in ethanol


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