Question

Assertion: Butene can be converted into butane
Reason: The addition reaction of hydrogen gas to an alkene will form an alkane
$\left( A \right)$ Both assertion and reason are correct and reason is the correct explanation for assertion.
$\left( B \right)$ Both assertion and reason are correct but reason is not the correct explanation for assertion.
$\left( C \right)$ assertion is correct but reason is incorrect.
$\left( D \right)$ both assertion and reason is incorrect.

Answer 1

Addition reaction is a chemical reaction in which two or more reactants combine to form a larger compound. There are two types of addition reaction that are electrophilic addition reaction and nucleophilic addition reaction.

Complete answer:
The structure of butene is $C{H_2} = C{H_2}$, which is also called butylene. It is a colourless gas.
$C{H_2} = C{H_2} + {H_2} \to C{H_3} - C{H_3}$
Above reaction shows how the hydrogen reacts with the butane and formation of butane occurs. So both the assertion and reason are correct and the reason is correct for assertion.

Hence, option A is correct.

Additional information:
Butene is an odourless gas. The process of conversation is also called hydrogenation which takes place in the presence of catalysts like nickel, palladium or platinum. Most hydrogenation reactions choose gaseous hydrogen for reaction bt now alternative has developed. The hydrogen attacks the double bond of alkene and converts it into a simpler form like alkane. The catalyst which operates at low temperature and pressure so catalysts are chosen accordingly.
Hydrogenation reaction is an example of heterogeneous catalysis. The catalyst can be divided into a homogeneous and heterogeneous catalyst. Homogeneous catalyst can be soluble in the solvent which contains the substrate. Heterogeneous catalysts are more commonly found in industrial areas.
In the case of vegetable oils this reaction occurs because it contains polyunsaturated derived salts. Vegetable oils are converted into solid after the hydrogenation process. The fats in the room temperature are saturated; they are also linear and form a long chain. Unsaturated fats are not linear due to the presence of double bonds.

Note:
The hydrogenation reaction which is taking place here is an exothermic reaction. It has released about $25Kcal/mol$. In petrochemical process the hydrogenation technique is used to make the alkenes and aromatic compound less toxic