Key Concept: Cracking breaks long-chain alkanes into shorter alkanes and alkenes using heat and a catalyst.
Section A: Process
1. Describe the conditions needed for catalytic cracking. [3]
2. Explain why cracking is necessary. [2]
Section B: Products
3. Complete the cracking equation: C10H22 -> C6H14 + ____. [2]
4. Name the type of hydrocarbon produced with a double bond. [1]
Total marks: 8
Mark Scheme
1. High temperature (about 600-700 C) and a catalyst such as silica/alumina [3]
2. To match supply with demand; short-chain fuels and alkenes are more useful [2]
3. C4H8 [2]
4. Alkene [1]