END
OF YEAR ASSESSMENT
S2 CHEMISTRY
TIME 1 ½ HOURS
Name……………………………………………………………….stream………………
SECTION A
Instructions
Attempt all questions
Section A consists of 8 questions and Section B 1 compulsory number
1 2 3 4 5 6 7 8
MARKS
Section B
No 9
Section A
1. a) State two physical properties of water that can be used to test for purity
of water (2 marks)
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b) In some countries rain freezes on the roads during winter night. This makes
the road slippery and dangerous. As a remedy salt is spread on these roads. State
the role of addition of salt on the roads. (4 marks)
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1
, c) Anhydrous copper (II) sulphate was added to the following liquids. State
what was observed in each case by filling in the table (4 marks)
Liquid Observation
Tape water
Sugar solution
Paraffin
Methylated spirit
2. A drop of other was dropped on the back of peter’s hand.
a) State what peter felt as the drop was evaporating (3 marks)
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b) State the conclusion can be drawn about the effect of evaporation (2 marks)
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c) Explain how this effect is an important aspect in the life of living organism
(5 marks)
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2
OF YEAR ASSESSMENT
S2 CHEMISTRY
TIME 1 ½ HOURS
Name……………………………………………………………….stream………………
SECTION A
Instructions
Attempt all questions
Section A consists of 8 questions and Section B 1 compulsory number
1 2 3 4 5 6 7 8
MARKS
Section B
No 9
Section A
1. a) State two physical properties of water that can be used to test for purity
of water (2 marks)
………………………………………………………………………………………
………………………………………………………………………………………
b) In some countries rain freezes on the roads during winter night. This makes
the road slippery and dangerous. As a remedy salt is spread on these roads. State
the role of addition of salt on the roads. (4 marks)
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
1
, c) Anhydrous copper (II) sulphate was added to the following liquids. State
what was observed in each case by filling in the table (4 marks)
Liquid Observation
Tape water
Sugar solution
Paraffin
Methylated spirit
2. A drop of other was dropped on the back of peter’s hand.
a) State what peter felt as the drop was evaporating (3 marks)
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
b) State the conclusion can be drawn about the effect of evaporation (2 marks)
………………………………………………………………………………………
………………………………………………………………………………………
c) Explain how this effect is an important aspect in the life of living organism
(5 marks)
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
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2
