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 Multiple Choice QuestionsMultiple Choice Questions

141.

Which compound does not form 2-methyl but-2-ene on heating with alc. KOH?

  • 1-bromo-2 methyl propane

  • 2-bromo-3-methyl butane

  • 2-bromo-2-methyl butane

  • None of the above


142.

In the reaction,

Acetylene NH4ClCuCl H2C=CH-CCHLindlar's catalyst(Pd/CaCO3)A

The final product A is:

 

  • butene

  • butyne-2

  • butyne-1

  • buta-1, 3-dene


143.

The olefin which on ozonolysis gives CH3CH2CHO and CH3CHO is

  • 2-butene

  • 1-pentene

  • 1-butene

  • 2-pentene


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144.

Which one of the following alkenes will react faster with H2 under catalytic hydrogenation conditions?


A.

As  is least stable thus, reacts faster with H2 under catalytic hydrogenation due to two R-groups in the same plane So, more surface area provides to hydrogenation reaction and alkenes will react faster with H2.


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145.

Liquid hydrocarbon is converted into mixture of gaseous hydrocarbons by

  • cracking

  • oxidation

  • hydrolysis

  • distillation under reduced pressure


146.

Which of the following is the most reactive towards ring nitration?

  • Benzene

  • Toluene

  • Mesitylene

  • m-xylene


147.

Compounds (A) gives two mol acetone and glyoxal on ozonolysis?

  • 2, 5-dimethyl hexyne

  • 2, 5-dmethyl hex-3-ene

  • 2, 5-dimethyl hex-2-yne

  • 2, 5-dimethyl hexa-2, 4-diene


148.

The degree of unsaturation of C6H6 and butyne-2 respectively are

  • 6 and 3

  • 6 and 2

  • 2 and 6

  • 4 and 2


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149.

A salt producing hydrocarbon among these compounds is

  • ethane

  • methane

  • ethene

  • ethyne


150.

Octane numberis zero for

  • n-octane

  • iso-octane

  • n-heptane

  • iso-heptane


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