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Introduction to Alkenes

An unknown co...

Question

An unknown compound has molecular formula $C_{7} H_{12}$
The unknown reacts with $H_{2}$ in presence of Pt at high temperature to give $C_{6} H_{16}$ . What information does this provide about the structure of unknown?

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Solution

The correct option is A 1
The molecular formula $C_{7} H_{12}$ indicates two degrees of unsaturation. It can be either two pi bonds or two rings or a pi bond and a ring. But on hydrogenation two molcules of hydrogen are added to give $C_{7} H_{16}$ . This indicates presence of two pi bonds. Hence, the molecule is acyclic in nature.

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