Reaction of PCl3 and PhMgBr would give from Chemistry Aldehydes,

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 Multiple Choice QuestionsMultiple Choice Questions

561.

Alkyl cyanides undergo Stephen reduction to produce

  • aldehyde

  • secondary amine

  • primary amine

  • amide


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562.

Reaction of PCl3 and PhMgBr would give

  • bromobenzene

  • chlorobenzene

  • triphenylphosphine

  • dichlorobenzene


C.

triphenylphosphine

When phosphorus trichloride reacts with phenyl magnesium bromide (Grignard's reagent), all the three chlorine atoms of PCl3, are replaced by phenyl group of phenyl magnesium bromide and triphenyl phosphine is obtained.

  


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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


568.

Aldol condensation is given by

  • trimethylacetaldehyde

  • acetaldehyde

  • benzaldehyde

  • formaldehyde


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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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