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 Multiple Choice QuestionsMultiple Choice Questions

81.

Secondary nitroalkanes can be converted into ketones by using Y. Identify Y from the following

  • aqueous HCl

  • aqueous NaOH

  • KMnO4

  • CO


82.

Alkyl cyanides undergo Stephen reduction to produce

  • aldehyde

  • secondary amine

  • primary amine

  • amide


83.

Reaction of PCl3 and PhMgBr would give

  • bromobenzene

  • chlorobenzene

  • triphenylphosphine

  • dichlorobenzene


84.

Ethylene glycol gives oxalic acid on oxidation with

  • acidified K2Cr2O7

  • acidified KMnO4

  • alkaline KMnO4

  • periodic acid


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85.

A Wittig reaction with an aldehyde gives

  • ketone compound

  • a long chain fatty acid

  • olefin compound

  • epoxide


C.

olefin compound

This is also a mean of preparing alkene where the position of the double bond is definite. In Wittig reaction, aldehyde (-CHO) and ketone (>C=O) react with methylene triphenyl phosphine [(C6H5)3P= CH2] to give alkene.

CH3CHO + (C6H5)3P = CH2  CH3-CH=CH2propene+ (C6H5)3P =OTriphenyl phosphine oxide


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86.

Cannizaro reaction is given by

  • HCHO

  • >C(OH)COOH

  • >CHCH2CHO

  • CH3CH2OH


87.

Identify the reactant.

  • H2O

  • HCHO

  • CO

  • CH3CHO


88.

Maleic acid and fumaric acid are

  • position isomers

  • geometric isomers

  • enantiomers

  • functional isomers


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89.

Aldol condensation is given by

  • trimethylacetaldehyde

  • acetaldehyde

  • benzaldehyde

  • formaldehyde


90.

Give the IUPAC name for

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

  • ethyl-4-oxoheptanoate

  • methyl-4-oxoheptanoate

  • ethyl-4-oxohexanoate

  • methyl-4-oxohexanoate


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