Question

One mole of heptane was thermally cracked, two hydrocarbons Q and P were formed.
Q was an alkene molecule with three carbon atoms.

1. Give the molecular formula of.
   • Q 
   • P 
2. Write the structural formula of Q. 
3. Name the compound formed when Q undergoes self addition reaction. 
4. State one disadvantage of using the product named above. 

Answer 1

One mole of heptane was thermally cracked, two hydrocarbons Q and P were formed.

Q was an alkene molecule with three carbon atoms.

1. Give the molecular formula of.
   • Q - C₃H₆ // CH₂ CHCH₃
   • P - C₄H₁₀ // CH₃ CH₂ CH₂ CH₃
2. Write the structural formula of Q. 
   
3. Name the compound formed when Q undergoes self addition reaction. 
   • Polypropene
4. State one disadvantage of using the product named in a(iii) above. 
   • Pollutes the environment  (as it is non-biodegradable)