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Gaseous ethylene and oxygen react in pre...

Gaseous ethylene and oxygen react in presence of `Pd//Al_(2)O_(3)` to form product Q.How many pi bonds is/are present in one molecule of product Q?

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The correct Answer is:
`1`
`2C_(2)H_(4(g))+O_(2(g))`
`overset(Pd//Al_(2)O_(3))(to)underset(Q)underset("Acetaldeyde")(2CH_(3)CHO_(g))`
1 molecule of `CH_(3)CHO` contains 1 pi bond.
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