What will be the main product, when benzene vapours are pass

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 Multiple Choice QuestionsMultiple Choice Questions

311.

Geometrical isomerism is found in :

  • pentene - 1

  • pentane

  • 2 - butene

  • butene - 1


312.

The reagent used in Gatterman Koch aldehyde synthesis is :

  • Pb/BaSO4

  • alkaline KMnO4

  • acidic KMnO4

  • CO + HCl


313.

Cetane is a compound which has very good ignition property .Chemically it is :

  • CH3(CH2)14CH3

  • (CH3)3C(CH2)11CH3

  • C17H34

  • None of the above


314.

The electrophile involved in the nitration of benzene is :

  • NO2

  • NO2+

  • NO

  • NO2-


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315.

Which of the following gives propyne on hydrolysis?

  • Al4C3

  • Mg2C3

  • B4C

  • La4C3


316.

What is obtained , when propene is treated with N-bromo succinimide ?

  • CH3-CBr=CH2

  • BrCH2-CH=CH2

  • BrCH2-CH=CHBr

  • BrCH2-CHBr-CH2Br


317.

Poisonous gas 'Lewisite' is obtained by the reaction of :

  • CHCH and AsCl3

  • CH2=CH2 and AsCl3

  • CHCH and S2Cl2

  • CH2=CH2 and NOCl


318.

Assertion : [Co(NO2)3(NH3)3] does not show optical isomerism.

Reason : It has a plane of symmetry.

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

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

  • If assertion is true, but reason is false.

  • Both assertion and reason are false statements.


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319.

What will be the main product, when benzene vapours are passed over V2O5 at 450°C ?


B.

Maleic anhydride is obtained by the oxidation of benzene in the presence of V2O5 at 450°C .

2C6H6 + 9O2 450°CV2O5 ( maleic anhydride) + 4H2O +CO2


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320.

Which is the best reagent to distinguish between propene and propyne ?

  • ammonical AgNO3

  • Br2CCl4

  • alkaline KMnO4

  • aqueous Br2


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