Question

Write the name and general formula of a chain of hydrocarbons in which an addition reaction with hydrogen is possible. State the essential condition for an addition reaction. Stating this condition, write a chemical equation giving the name of the reactant and the product of the reaction.(All India - 2015)

Answer 1

Answer:

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Answer 2

For addition reaction with hydrogen to take place there should be presence of either a double bond or single bond in the hydrocarbon.

There are two types of hydrocarbons in which addition reaction with hydrogen is possible -

1)alkenes (general formula- Cn H2n)

2)alkynes (Cn H(2n-2))

• Addition of hydrogen to alkene-

Addition of hydrogen to methene produces methane .

C2H4 + H2 ----------> C2H6

• Addition of hydrogen to alkene-

Addition of hydrogen to methyne produces methane .

C2H2 + 2H2 ----------> C2H6