CIE iGCSE Co-Ordinated Science C11.4 Alkanes Exam Style Questions Paper 2
Question
Reactants for three chemical processes are listed.
1 ethene + steam
2 ethene + hydrogen
3 ethene forming poly(ethene)
Which processes form saturated hydrocarbons?
(A) 1, 2 and 3
(B) 1 and 2 only
(C) 1 and 3 only
(D) 2 and 3 only
▶️Answer/Explanation
Ans : D
Question
The Haber process is used to make ammonia.
Which statement about the Haber process is not correct?
A A vanadium(V) oxide catalyst is used.
B The nitrogen used is obtained from the air.
C The pressure used is 200 atmospheres.
D The temperature used is 450 ºC.
▶️Answer/Explanation
Ans : A
Question
The same mass of five different alkanes are left to evaporate under identical conditions.
The mass lost by each alkane in one day is measured.
Which graph shows the mass lost against the number of carbon atoms in each alkane chain?
▶️Answer/Explanation
Ans :A
Question
The cracking of decane molecules is represented by the equation shown.
What is Y?
- A: C₄H₈
- B: C₄H₁₀
- C: C₇H₁₄
- D: C₇H₁₆
▶️Answer/Explanation
Answer: B
Explanation: The cracking of decane (C₁₀H₂₂) produces smaller alkanes and alkenes. In this case, Y is C₄H₁₀, which is butane.