Question

What is the number of hydrogen atoms present in the hydrocarbon formed by the hydrogenation of ethylene?

Answer 1

hydrogenation of ethylene is:

C2H4 + H2 → C2H6

Answer 2

Answer: The number of hydrogen atoms present in the hydrocarbon formed by the hydrogenation of ethylene is 6.

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms. The general formula for these hydrocarbons is $C_nH_{2n+2}$

Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is $C_nH_{2n}$ and $C_nH_{2n-2}$

Ethylene is a unsaturated hydrocarbon with 2 carbon atoms and is an alkene. Thus chemical formula for ethylene is $C_2H_4$

Hydrogenation is a chemical reaction in which hydrogen is added to unsaturated hydrocarbons,.

$CH_2=CH_2+H_2\rightarrow CH_3-CH_3$

Thus ethane is formed which has 6 hydrogen atoms.