Given: R = 8.314 JK-1 mol-1, the work done during combustion of 0

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 Multiple Choice QuestionsMultiple Choice Questions

311.

Which of the following on combustion gives maximum energy?

  • Ethane

  • Propane

  • Methane 

  • Butane


312.

C2H6 + CH3Cl Anhy. AlCl3 C6H5CH3 + HCl

The name of the above reaction is

  • Gattermann

  • Reimer-Tiemann

  • Friedel-Craft

  • Cannizzaro


313.

The tetraethyl lead mixed in petrol works as 

  • cooling agent

  • anti-knocking agent

  • bleaching agent

  • None of the above


314.

The number of alkenyl groups possible from C4H7 are

  • 7

  • 5

  • 3

  • 8


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315.

Among the following select the alkane that is expected to have lowest boiling point

  • hexane

  • 2-methylpentane

  • 3-methylpentane

  • 2,2-dimethylbutane


316.

'X' is an optically active alkane having lowest molecular mass, Predict the structure of the major product obtained on monochlorination of 'X'.


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317.

Given: R = 8.314 JK-1 mol-1, the work done during combustion of 0.090 kg of ethane (molar mass = 30) at 300 K is

  • -18.7 kJ

  • 18.7 kJ

  • 6.234 kJ

  • -6.234 kJ


B.

18.7 kJ

Since, combustion takes place at constant pressure, hence H = 3W

H = nCpdT

3W = 0.09030 × 52 × 8.314 × 300

     = 18.7 kJ


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318.

What is the possible number of monohydroxy derivatives of a hydrocarbon consisting of five carbon atoms with one methyl group as a branch?

  • 2

  • 3

  • 4

  • 5


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319.

Chlorination of ethane is carried out in the presence of

  • anhydrous AlBr3

  • mercuric chloride

  • ultraviolet light

  • zinc chloride


320.

The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal in the presence of dry ether is

  • butane

  • octane

  • hexane

  • ethane


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