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S2 Acids & Alkali's

Total questions: 54

Worksheet time: 30mins

Name
Class
Date
1.

What is the pH of distilled water?

a)

pH 12

b)

pH 3

c)

pH 8

d)

pH 7

2.

What colour does litmus paper turn when added to an alkali?

a)

Blue

b)

Red

c)

Green

d)

Colourless

3.

What colour does litmus paper turn when added to an acid?

a)

Blue

b)

Red

c)

Green

d)

Colourless

4.

What other laboratory substance can you use to test if a colourless substance is an acid or an alkali?

a)

Catalyst

b)

Salt

c)

Universal Indicator

d)

Water

5.

Which substance is an acid?

a)

Water

b)

Bleach

c)

Orange juice

d)

Washing powder

6.

Which pH levels indicated a strong acid?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

7.

Which pH level indicates a weak alkali?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

8.

Which pH level indicates a weak acid?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

9.

Which pH level indicates a strong alkali?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

10.

What pH range would you get for an acid?

a)

0-6

b)

7

c)

7-14

d)

2-10

11.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
12.
a)

PH scale

b)

pH ruler

c)

pH scale

d)

pH statistical tables

13.
What is the pH value of vinegar?
a)
1
b)
7
c)
4
d)
11
14.

What is the hazard shown in this hazard sign?

a)

Explosive

b)

Corrosive

c)

Irritant

d)

High level Irritant

15.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
16.
What colour is universal indicator in a neutral solution?
a)
Green
b)
Orange
c)
Purple
d)
Red
17.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
18.

Strong acids and strong alkalis are.......

a)

Able to turn blue litmus paper red

b)

Corrosive

c)

Sour

d)

Sweet

19.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
20.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
21.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
22.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
23.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
24.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
25.

Bleach is a strong alkali, what is the pH level of bleach?

a)

13

b)

10.5

c)

1

d)

2

26.

Acid in our stomach:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

27.

Acid in soft drink:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

28.

Acid in car battery:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

29.

Which substance is alkali?

a)

Toothpaste

b)

Vinegar

c)

Lemon juice

d)

Soft drink

30.

Which substance is acid?

a)

Toothpaste

b)

Vinegar

c)

Soap

d)

Ammonia

31.

The color of litmus in acid:

a)

Red

b)

Blue

c)

Purple

d)

Green

32.

The color of litmus in alkali:

a)

Red

b)

Blue

c)

Purple

d)

Green

33.

Rain water is slightly acidic. What is its pH?

a)

1.0

b)

5.6

c)

7.0

d)

8.2

34.

Indigestion can be treated by drinking ....

a)

water

b)

antacid

c)

vinegar

d)

sodium hydroxide

35.

Something that can be used to identify acid/alkali:

a)

Indicator

b)

Oxidator

c)

Reductor

d)

Terminator

36.

pH of alkali:

a)

0

b)

7

c)

below 7

d)

above 7

37.
Litmus paper is an indicator of acids and bases, it turns red for bases.
a)
True
b)
false
38.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
39.
According to the image, the substance tested is a...
a)
Acid
b)
Neutral
c)
Strong Acid
d)
Base
40.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
41.
Examine the results (color change) of the pH paper shown in the picture.  What type of substance was tested?
a)
an acid
b)
a base
c)
a neutral substance
d)
none of the above
42.
One benefit of Red Cabbage Juice Indicator is that it...
a)
Tells you the exact pH 
b)
Is very accurate
c)
It is very expensive
d)
It can be made from materials you have at home
43.
One drawback of litmus paper is that it
a)
Only tells you if a substance is an acid or a base
b)
is very expensive
c)
is messy
d)
has to be connected to a computer
44.
One benefit of a pH Meter is that it
a)
is very expensive
b)
only tells you if a substance is an acid or a base
c)
is very accurate
d)
can be made from substances you have at home
45.
What is the pH of the substance being tested?
a)
2
b)
4
c)
6
d)
8
46.
How would you classify the substance being tested?
a)
Acid
b)
Base
c)
Both
d)
Neither
47.

A soluble base is called an.......

a)

Precipitate

b)

Alkali

c)

Acid

d)

Neutral

48.

When an acid and alkali mix that is called....?

a)

Exothermic

b)

Endothermic

c)

Neutralisation

d)

Precipitation

49.

What does not cause acid rain?

a)

Carbon dioxide

b)

Nitrogen dioxide

c)

Sulphur dioxide

d)

Sodium chloride

50.

How do we separate a soluble salt from a solution of salty water?

a)

Evaporation

b)

Filtration

c)

Chromatography

d)

Distillation

51.

Bee stings get treated with?

a)

An acid

b)

An alkali

52.

Wasp stings get treated with?

a)

Vinegar

b)

Bicarbonate of soda

53.

acids and metal carbonates mix together to produce what gas?

a)

Hydrogen

b)

Carbon dioxide

c)

Air

d)

Nitrogen

54.

Write in order, the steps you would take to make a cabbage pH indicator solution.

4 lines

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