Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

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

291.

Catalytic dehydrogenation of a primary alcohol gives a

  • secondary alcohol

  • aldehyde

  • ketone

  • ester


292.

The product formed when hydroxylamine condenses with a carbonyl compound is called

  • hydrazide

  • oxime

  • hydrazine

  • hydrazone


293.

The compound on dehydrogenation gives a ketone. The original compound is

  • primary alcohol 

  • secondary alcohol

  • tertiary alcohol

  • carboxylic acid


294.

Which of the following organic compounds answers to both iodoform test and Fehling's test?

  • Ethanol

  • Methanal

  • Ethanal

  • Propanone


Advertisement
Advertisement

295.

CH3COOH LiAlH4 X 300°CCu Y NaOHDilute Z

In the above reaction Z is

  • Butanol

  • Aldol

  • Ketol

  • Acetal


B.

Aldol

In the reaction Z is aldol.

CH3COOHAcetic acid LiAlH4 CH3CH2OH(X) 300°CCu CH3CHO(Y) (aldol condensation)dil. NaOH  CH3CHCH2CHO(Z) aldol


Advertisement
296.

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

  • 1, 1-dichloroethane

  • 1, 1, 1-trichloroethane

  • 1-chloroethane

  • 1, 2-dichloroethane


297.

The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits

  • geometrical isomerism

  • optical isomerism

  • neither optical nor geometrical isomerism

  • both optical and geometrical isomerism


298.

Benzaldehyde and acetone can be best distinguished using

  • Fehling's solution

  • Sodium hydroxide solution

  • 2, 4-DNP

  • Tollen's reagent


Advertisement
299.

One mole of an organic compound A with the formula C3H8O reacts completely With two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound A is

  • propan-2-ol

  • propan-1-ol

  • ethoxyethane

  • methoxyethane


300.

The correct sequence ofsteps involved in the mechanism of Cannizaro's reaction is

  • nucleophilic attack, transfer of H- and transfer of H+

  • transfer of H-, transfer of H+ and nucleophilic attack

  • transfer if H+, nucleophilic attack and transfer of H-

  • electrophilic attack by OH-, transfer of H+ and transfer of H-


Advertisement