The false statement regarding alkane is from Chemistry Hydrocarb

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 Multiple Choice QuestionsMultiple Choice Questions

51.

By which of the following process hydrocarbons are found from petroleum?

  • Combustion

  • Fractional distillation

  • Addition

  • All of the above


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52.

The false statement regarding alkane is

  • this does not perform polymerization reaction

  • this does not gives elimination reaction

  • it does not disappear the colour of dilute KMnO4 solution

  • it does not decolourise bromine water


B.

this does not gives elimination reaction

Alkanes show elimination reactions. Higher alkanes eliminate hydrogen and lower alkanes on heating in the absence of air at 500-700°C.

CH3-CH2-CH3Propane 600°C CH3-CH=CH2Propene + CH2=CH2Ethene + CH4Methane + H2


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53.

Which of the following aromatic compound gives sulphonation reaction very easily?

  • Chlorobenzene

  • Nitrobenzene

  • Toluene

  • Benzene


54.

Which of the following on combustion gives maximum energy?

  • Ethane

  • Propane

  • Methane 

  • Butane


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55.

C2H6 + CH3Cl Anhy. AlCl3 C6H5CH3 + HCl

The name of the above reaction is

  • Gattermann

  • Reimer-Tiemann

  • Friedel-Craft

  • Cannizzaro


56.

The tetraethyl lead mixed in petrol works as 

  • cooling agent

  • anti-knocking agent

  • bleaching agent

  • None of the above


57.

The number of alkenyl groups possible from C4H7 are

  • 7

  • 5

  • 3

  • 8


58.

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

  • hexane

  • 2-methylpentane

  • 3-methylpentane

  • 2,2-dimethylbutane


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59.

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


60.

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


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