Number of bonds in benzene : from Chemistry Hydrocarbons

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

301.

Degree of unsaturation of A= 2 double or triple bond. Identify A.

  • None of these 


302.

Assertion: Cis-2-butene gives meso-2, 3-butanediol with dilute alkaline KMnO4 solution.

Reason : Dilute alkaline KMnO4 solution gives trans addition with alkenes.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


303.

Assertion : The presence of Ag+ enhances the solubility of alkenes in water.

Reason : Alkenes are weakly polar in nature.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


304.

Identify the final product.

  • None of these


Advertisement
305.

CHCH H2SO4HgSO4 H2OCH3MgBr P/Br2

  • CH3CH(Br)CH3

  • CH3CH2CH2Br

  • CH2=CH-Br

  • BrCH=CH-CH3


Advertisement

306.

Number of bonds in benzene :

  • 6σ and 3π

  • 12σ and 3π

  • 3σ and 12π

  • 6σ and 6π


B.

12σ and 3π

Thus in benzene , 12σ and 3π bonds are present .


Advertisement
307.

Propene on hydroboration and oxidation produces

  • CH3CH2CH2OH

  • CH3CHOHCH3

  • CH3CHOHCH2OH

  • CH3CH2CHO


308.

C6H6  H2SO4HNO3 X FeCl3Cl2 Y

In the above sequence Y can be

  • 3-nitrochlorobenzene

  • 1-nitrochlorobenzene

  • 4-nitrochlorobenzene

  • none of these


Advertisement
309.

Which of the following is aromatic?


310.

Which of the following species participate in sulphonation of benzene ring?

  • H2SO4

  • SO3

  • HSO3-

  • SO2-


Advertisement