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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


86.

Cannizaro reaction is given by

  • HCHO

  • >C(OH)COOH

  • >CHCH2CHO

  • CH3CH2OH


87.

Identify the reactant.

  • H2O

  • HCHO

  • CO

  • CH3CHO


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88.

Maleic acid and fumaric acid are

  • position isomers

  • geometric isomers

  • enantiomers

  • functional isomers


B.

geometric isomers

The structures of maleic and fumaric acids are given below:

           

The structures of fumaric and maleic acid suggest that they are geometrical isomers because they have same molecular formula but different spatial arrangement of atoms around a double bond.
When the similar groups are present on same side of double bond, the isomer is called cis and when different groups are present on same side of double bond, then the isomer is called trans. Hence, maleic acid is cis form and fumaric acid is trans form.


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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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