2nd Term Test 01: 10.1 – 10.3
Test 10.1 – 10.3
Concept Checking (11 marks)
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
|
T
|
F
|
F
|
F
|
T
|
T
|
F
|
F
|
T
|
F
|
2. Tea does not taste sour, but it contains
acids
3. All substances can be classified into three
groups: acids, alkalis and alkaline substances.
4. Both acids and alkalis are irritant and
corrosive.
7 Table salt solution cannot turn red litmus
paper blue (as it is neutral).
8. A neutral substance has a pH value equal to
7.
10. Some substances have pH values lower than 0
and higher than 14.
Multiple Choice (13 marks)
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
|
B
|
C
|
D
|
B
|
C
|
D
|
D
|
C
|
A
|
D
|
|
11
|
12
|
13
|
14
|
|
C
|
B
|
B
|
D
|
Fill in the Blanks
1. (a) sour
(b) lactic
(c) citric
2. (a) eye-wash bottle
(b) slow
running water
3. (a) blue
(b) red
4. ___ pH
meter
5. (a) low
(b) low acidity
6. (a) litmus
paper
(b) red
7. (a) safety
goggles
(b) gloves
Short Question
(a)
He can identify dilute
hydrochloric acid (1), because only it turns blue litmus paper red (1),
while
the three other solutions do not change the colour of blue litmus paper (1).
(b) He can identify distilled water (1), because it
does not change the colours of both red and
blue litmus paper (1), while the two other
solutions turn red litmus paper blue (1).
(c) He can identify the two remaining solutions (1),
because dilute sodium hydroxide has
a higher pH value than dilute ammonia solution (1).
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