Question

…………is the breaking down of long chain hydrocarbons into smaller molecules.

• A. Decomposition
• B. Catenation
• C. Cracking
• D. Combustion

Hint:

Cracking improves fuel quality by producing smaller hydrocarbons like petrol and LPG.

Answer 1

The Correct Option is C

Step 1: Understanding the process.
Cracking, in petroleum refining, breaks down large hydrocarbon molecules into smaller, more valuable ones.
Step 2: Types of cracking.
- Thermal cracking: uses heat.
- Catalytic cracking: uses zeolite catalysts.
Step 3: Eliminate other options.
- Decomposition: general breakdown, not specific to hydrocarbons.
- Catenation: the ability of atoms (like carbon) to form chains.
- Combustion: reaction with oxygen producing \(CO_2\) and \(H_2O\).
Therefore, the answer is Cracking.
Final Answer: \[ \boxed{\text{Cracking}} \]