Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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51.

Which of the following fibres is not made up of polyamides ?

  • Wool

  • Natural silk

  • Artificial silk

  • Nylon


C.

Artificial silk

Artificial silk is a polysaccharide contains glycosidic linkages .


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52.

The high oxidising power offluorine is due to :

  • high electron affinity

  • high heat of dissociation and low heat of hydration

  • high heat of hydration and low heat of dissociation

  • high heat of hydration and high heat of dissociation


53.

The reaction C2H5ONa + C2H5 C2H5OC2H5 + Nal is known as :

  • Kolbe's synthesis

  • Wurtz's synthesis

  • Williamson's synthesis

  • Grignard's synthesis


54.

The catalyst used in the preparation of an alkyl chloride by the action of dry HCl on an alcohol is :

  • anhydrous AlCl3

  • Fecl3

  • anhydrous ZnCl2

  • Cu


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55.

In the reaction ,

R - X Alcoholic KCN B Dilute HCI  B

The product B is :

  • alkyl chloride

  • aldehyde

  • carboxylic acid

  • ketone


56.

Which of the following compounds would not evolve CO2 when treated with NaHCO3 solution ?

  • salicylic acid

  • Phenol

  • anisole

  • phenyl benzoate


57.

By heating phenol with chloroform in alkali , it is converted into :

  • salicylic acid

  • salicylaldehyde

  • anisole

  • phenyl benzoate


58.

When a mixture of calcium benzoate and calcium acetate is dry distilled , the resulting compound is :

  • acetophenone

  • benzaldehyde

  • benzophenone

  • acetaldehyde


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59.

Glucose contains in addition to aldehyde group :

  • one secondary - OH and four primary - OH groups

  • one primary - OH and four secondary - OH groups

  • two primary - OH and three secondary - OH groups

  • three primary - OH and two secondary - OH groups


60.

A distinctive and characteristic functional group of fats is :

  • a peptide group

  • an ester group

  • an alcoholic group

  • a ketonic group


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