During the dehydration of alcohols to alkenes by heating with con

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Monomers of nylon 2-nylon 6 are

  • glycine and amino caproic acid

  • glycine and caproic acid

  • hexamethylene diamine and adipic acid

  • alanine and amino caproic acid.


52.

Maltose is made of the units

  •  α-D glucose and β-D glucose

  •  α-D glucose and β-D fructose

  • α-D glucose and β-D glucose

  • α-D glucose and β-D galactose.


53.

Which does not give Cannizzaro reaction?

  • HCHO

  • C6H5CO-CHO

  • Ph-CHO

  • Ph-CH2-CHO


54.

Which one of the following is an example for homogeneous catalysis?

  • Manufacture of ammonia by Haber's process.

  • Manufacture of sulphuric acid by contact process.

  • Hydrogenation of oil.

  • Hydrolysis of sucrose in presence of dilute hydrochloric acid.


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55.

Which one of the following is not employed as antihistamine?

  • Dimetane

  • Chloramphenicol

  • Seldane

  • Both (a) and (b


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56.

During the dehydration of alcohols to alkenes by heating with conc. H2SO4 the initiating step is

  • elimination of water

  • protonation of an alcohol molecule

  • formation of an ester

  • formation of carbocation.


B.

protonation of an alcohol molecule

The mechanism of dehydration of alcohol involves the following steps:

1. Formation of protonated alcohol
2. Formation of carbocation
3. Formation of ethene by elimination of a proton.


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57.

In Clemmensen reduction, compound is treated with

  • zinc amalgam + HCI

  • sodium amalgam+ HCI

  • zinc amalgam + HNO4

  • sodium amalgam + HNO3


58.

Assertion: Insulin is water soluble.

Reason: Insulin is a globular protein.

  • 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


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59.

Assertion : (CH3)3CCOOH does not give HVZ reaction.

Reason: (CH3)3CCOOH does not have α-hydrogen atom.

  • 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.


60.

Assertion: Natural rubber is a polymer of isoprene.

Reason: Isoprene is a pentene.

  • 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.


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