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Question

What are the required conditions for catalytic hydrogenation of alkynes?

A
Nickel as catalyst
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B
High temperature
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C
Low temperature
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D
Vanadium pentoxide as catalyst
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Solution

The correct options are
A Nickel as catalyst
B High temperature
Hydrogenation reactions are addition reactions in which hygrogen atoms are added to an alkene.

For example, vapours of ethene mixed with hydrogen are passed over a heated catalyst (Ni or Pd or Pt) at high temperatures, which results in the formation of ethane.
CH2=CH2(g) + H2(g) Ni/Pd−−CH3CH3(g) Ethene Ethane

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