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WorksheetsHollingworth Academy Y7 Acids and Alkalis 7F - pH scale
Total questions: 15
Worksheet time: 20mins
Name
Class
Date
1.
What is the hazard shown in this hazard sign?
a)
Explosive
b)
Corrosive
c)
Irritant
d)
High level Irritant
2.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
3.
What colour is universal indicator in a neutral solution?
a)
Green
b)
Orange
c)
Purple
d)
Red
4.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
5.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
6.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
7.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
8.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
9.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
10.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
11.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
12.
Bleach is a strong alkali, what is the pH level of bleach?
a)
13
b)
10.5
c)
1
d)
2
13.
What colour does litmus paper turn when added to an alkali?
a)
Blue
b)
Red
c)
Green
d)
Colourless
14.
What colour does litmus paper turn when added to an acid?
a)
Blue
b)
Red
c)
Green
d)
Colourless
15.
What other laboratory substance can you use to test if colourless substance is an acid or an alkali?
a)
Catalyst
b)
Salt
c)
Universal Indicator
d)
Water
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