Catalystic hydrogenation is most easy in alkenes of the type

1.	Catalystic hydrogenation is most easy in alkenes of the type
Answer» `R_(2)C=CH_(2)` `RCH=CHR` `R_(2)C=CHR` `R_(2)C=CR_(2)` Solution :During catalytic hydrogention, the less hindered SIDE of an alkene is absorbed on the METAL SURFACE, and this is then followed by the simultaneous addition of two `H` ATOMS : Here, `M` stands for metal catalyst.

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