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Explain catalytic hydrogenation....

Explain catalytic hydrogenation.

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When alkenes react with hydrogen in the presence of nickel pt or pd catalyst to give alkanes. This process is known as catalytic hydrogenation.
` R - CH = underset("Alkene")(CH_(2)) + H_(2) underset(" "Delta" ")overset(" "Ni" ")(rarr) R - CH_(2) - CH_(3)`
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