Q56 of 312 Page 223

Which of the following cannot exhibit isomerism?

At least four carbon atoms are required for hydrocarbons to show isomerism. Thus propane (C3H8) has three carbon atoms in its molecule so it does not exhibit isomerism.

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54 A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be: 55 The hydrocarbon which has alternate single and double bonds arranged in the form of a ring is: 57 The pencil leads are made of mainly: 58 The number of isomers formed by the hydrocarbon with molecular formula C5H12 is: