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How are primary amines prepared from nit...

How are primary amines prepared from nitro compounds? Write the equation. 

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Nitro compounds are reduced to amines by passing hydrogen gas in the presence of finely divided nickel, Palladium (or) platinum.
`underset("Nitro compound")(R-NO_(2))overset(H_(2)//Ni)rarr underset(1^(@)" Amines")(R-NH_(2))`
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