MARK SCHEME
UJIAN PENGESANAN 1 KIMIA TING. 5 (2018)
SECTION A / BAHAGIAN A
1. C
6. D
11. C
2. A
7. B
12. B
3. A
8. A
13. B
4. D
9. D
14. B
5. A
10. D
15. C Total = 15 marks
SECTION B / BAHAGIAN B
Question 1
Mark Scheme
Marks
(a)
A chemical / substance that changes / alters / increases the rate of reaction Suatu bahan (kimia) yang mengubah / menambah / meningkatkan kadar tindak balas r : substance that affect rate of reaction // substance that speeds up or slow down the rate of reaction
1
(b)
Copper(II) sulphate Kuprum(II) sulfat
1
Set I : 30 cm3 // 15 cm3 min-1 // 30 cm3 // 0.25 cm3 min-1 2 min 120 s
1
Set II : 50 cm3 // 25 cm3 min-1 // 50 cm3 // 0.417 cm3 min-1 2 min 120 s
1
The rate of reaction in Set II is higher than in Set I Kadar tindak balas dalam Set II lebih tinggi berbanding dalam Set I r : The rate of reaction in Set II is faster than in Set I // Kadar tindak balas dalam Set II lebih cepat berbanding dalam Set I a : The rate of reaction in Set II is higher // Kadar tindak balas dalam Set II lebih tinggi
1
(c)(i)
(c)(ii)
(c)(iii) [any 2 points] 1. Catalyst lowers / decreases / reduces the activation energy Mangkin merendahkan tenaga pengaktifan 2. More colliding particles achieve the activation energy Lebih banyak zarah mencapai tenaga pengaktifan itu 3. Frequency of effective collision increases Frekuensi perlanggaran berkesan meningkat
1 1 1 Max. : 2 1