Question

Some reactions of propane are given. 

i. Hydrogen atoms are substituted one by one, in presence of sunlight. 

ii. When heated in the absence of air, it decomposes to hydrocarbons with lesser molecular mass. 

iii. Combines with oxygen to give CO₂ and H₂O. 

a. Identify the type of reaction in each case. 

b. Write the chemical equation of the reaction (ii)

Answer 1

a. i. Substitutional reaction 

ii. Thermal cracking iii. Combustion 

b. CH₃ – CH₂ – CH₃ → CH₂ = CH₂ + CH₄