Single Choice

Which one of the following alkenes will react faster with $$H_2$$ under catalytic hydrogenation conditions?

A
B
C
Correct Answer
D

Solution

Stability of alkene is inversely proportional to the heat of hydrogenation of alkene.
Catalytic hydrogenation takes place in $$3^{rd}$$ compound.The energy required to break the double bond is lesser in $$3^{rd}$$ compound than any other compound.
Greater the number of alkyl groups attached to the doubly bonded carbon atoms, more stable is the alkene. (less reactive)

SIMILAR QUESTIONS

Hydrocarbons

Ethylene is converted to ethane in the presence of $$Ni$$ at $$300^{0}C$$ . In this reaction the hybridization of carbon changes from :

Hydrocarbons

A hydrocarbon $$'X'$$ adds on one mole of hydrogen to give another hydrocarbon and decolourised bromine water. $$'X'$$ reacts with $${ KMnO }_{ 4 }$$ in the presence of acid to give two moles of the same carboxylic acid. The structure of $$'X'$$ is:

Hydrocarbons

Hydrogenation of $$C_{6}H_{5}CHOHCOOH$$ over $$Rh -Al_{2}O_{3}$$ gives :

Hydrocarbons

Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is(are):

Hydrocarbons

Write structures of all the alkenes which on hydrogenation give 2 - methylbutane.

Hydrocarbons

Give the formula and name of $$A, B, C$$ and $$D$$ in the following equations: $$C_2H_2 \xrightarrow {H_2}\ A \xrightarrow{H_2}\ B\ \underset{-HBr}{\xrightarrow {Br_2}}\ C\ \underset{-HBr}{\xrightarrow {Br_2}}\ D$$

Hydrocarbons

Addition reaction and substitution reaction are type of organic reactions. Which type of reaction is shown by ethene?

Hydrocarbons

Which one of the following alkenes will react faster with $$H_2$$ under catalytic hydrogenation conditions?

Hydrocarbons

In which case the reaction is most exothermic with $$H_2$$ Ni.

Hydrocarbons

The gas used in the hydrogenation of oils in presence of nickel as a catalyst is:

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