Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

In electrophilic aromatic substitution reaction, the nitro group is meta directing because it

  • decreases electron density at ortho and para positions

  • decreases electron density at meta position

  • increases electron density at meta position

  • ncreases electron density at ortho and para positions


32.

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with

  • PCl3

  • PCl5

  • SOCl2 in presence of pyridine

  • dry HCl in the presence of anhydrous ZnCl2


33.

The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is

  • methanal

  • propanal

  • propanone

  • ethanal


34.

The compound which forms acetaldehyde when heated with dilute NaOH, is

  • 1,1-dichloroethane

  • 1,1,1-trichloroethane

  • 1-chloroethane

  • 1,2-dichloroethane


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35.

The condensation polymer among the following is

  • rubber

  • protein

  • PVC

  • polyethene


36.

In which of the following, NH3 is not used?

  • Tollen's reagent

  • Nessler's reagent

  • Group reagent for the analysis of IV group basic radicals

  • Group reagent for the analysis of III group basic radicals


37.

Amine that cannot be prepared by Gabriel phthalimide synthesis is

  • aniline

  • benzylamine

  • methylamine

  • iso-butylamine


38.

Lactose is made of

  • α-D-glucose only

  • α-D-glucose and β-D-glucose

  • α-D-galactose and β-D-glucose

  • β-D-galactose and β-D-glucose


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39.

Cetyltrimethyl ammonium bromide is a popular

  • anionic detergent

  • cationic detergent

  • non-ionic detergent

  • sweetener


B.

cationic detergent

Cetyltrimethyl ammonium bromide which is a germicide, is a popular cationic detergent.


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40.

The dispersed phase and dispersion medium in soap lather are respectively

  • gas and liquid

  • liquid and gas

  • solid and gas

  • solid and liquid


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