3
Question
Which one of the following compounds is not formed in the 'catalytic cracking' of octane?
Which one of the following compounds is not formed in the 'catalytic cracking' of octane?
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Solution
The correct option is C Hydrogen gas
During pyrolysis or catalytic cracking of alkanes, on strong heating at high temperature, in absence of air, higher alkanes split into lower alkanes, alkenes and hydrogen.
R−HHeat−−−−−−−−−−→absence of oxygen(lower alkane)R−H+(alkene)R=R+H2
However during catalytic cracking of octane, hydrogen gas is not obtained. Pentane, butane and propene are obtained.
Option D is correct.
During pyrolysis or catalytic cracking of alkanes, on strong heating at high temperature, in absence of air, higher alkanes split into lower alkanes, alkenes and hydrogen.
R−HHeat−−−−−−−−−−→absence of oxygen(lower alkane)R−H+(alkene)R=R+H2
However during catalytic cracking of octane, hydrogen gas is not obtained. Pentane, butane and propene are obtained.
Option D is correct.
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