Subject

Chemistry

Class

JEE Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement

41.

Which one of the following is not expected to undergo iodoform reaction?

  • Propan-2-ol

  • Diphenyl methanol

  • 1-phenylethanol

  • 2-butanol


B.

Diphenyl methanol

Compounds having methyl ketone (-COCH3) group or 2° alcohol group (CH3-CH(OH)-) or ethanol when treated with iodine in the presence of alkali gives yellow coloured iodoform and this reaction is known as iodoform test.

The structures of the given compounds are-

Thus, on arranging the given options, only diphenyl methanol does not give iodoform reaction.


Advertisement
42.

Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce but-2-enal

  • methanal and ethanal

  • two moles of ethanal

  • methanal and propanone

  • ethanal and propanone


43.

An organic compound with the molecular formula C8H8O forms 2,4-DNP derivative, reduces Tollen's reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2-benzenedicarboxylic acid. The organic compound is

  • 2-ethylbenzaldehyde

  • 2-methylbenzaldehyde

  • acetophenone

  • 3-methylbenzaldehyde


44.

Phenyl isocyanide is prepared from aniline by

  • Carbylamine reaction

  • Rosenmund's reaction

  • Koble's reaction

  • Reimer-Tiemann reaction


Advertisement
45.

Gabriel's phthalimide synthesis can be used to prepare

  • ethanamine

  • N-methylmethanamine

  • benzene amine

  • N, N-dimethylmethanamine


46.

The sugar moiety present in RNA molecule is

  • β-D-2-deoxyribose

  • β-D-galactose

  • β-D-fructofuranose

  • β-D-ribose


47.

Novlac, the linear polymer used in paints is

  • copolymer of 1,3-butadiene and styrene

  • obtained by the polymerization of methyl methacrylate

  • nitial product obtained in the condensation of phenol and formaldehyde in the presence of acid catalyst

  • obtained by the polymerisation of caprolactam


48.

The carbohydrate used as storage molecule in animal is

  • sucrose

  • glycogen

  • maltose

  • glucose


Advertisement
Advertisement