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Acids and alkalis

Total questions: 40

Worksheet time: 45mins

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.

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

a)

Able to turn blue litmus paper red

b)

Corrosive

c)

Sour

d)

Sweet

6.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
7.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
8.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
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.

Acid + Alkali --> Salt + Water

a)

neutralization reaction

b)

synthesis

c)

decomposition

d)

single displacement

14.
A neutralization reaction will always produce...
a)
water & salt
b)
water
c)
salt
d)
water & carbon
15.

Acids are source of

a)

hydrogen ions

b)

hydroxide ions

16.

Alkalis are source of

a)

hydrogen ions

b)

hydroxide ions

17.

The pH of pure water

a)

5.6

b)

7.0

c)

8.1

d)

0.0

18.

Acid in our stomach:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

19.

Acid in soft drink:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

20.

Acid in car battery:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

21.

Acid in vinegar:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

22.

Which substance is alkali?

a)

Toothpaste

b)

Vinegar

c)

Lemon juice

d)

Soft drink

23.

Acids taste .....

a)

sour

b)

bitter

c)

sweet

d)

umami

24.

Rain water is slightly acidic. What is its pH?

a)

1.0

b)

5.6

c)

7.0

d)

8.2

25.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

26.

Something that can be used to identify acid/alkali:

a)

Indicator

b)

Oxidator

c)

Reductor

d)

Terminator

27.

The color of universal indicator in hydrochloric acid:

a)

Red

b)

Blue

c)

Purple

d)

Green

28.

The color of universal indicator in sodium hydroxide:

a)

Red

b)

Yellow

c)

Purple

d)

Green

29.

pH of alkali:

a)

0

b)

7

c)

below 7

d)

above 7

30.

The image shows a PH scale. Which option indicates strong alkali?

a)

a

b)

b

c)

c

d)

d

31.

The image shows a PH scale. Which option indicates strong acid?

a)

a

b)

b

c)

c

d)

d

32.

Alkalis feel...

a)

Rough

b)

Soapy

c)

Granulated

d)

Smooth

33.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

34.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

35.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

36.

An alkali can neutralize an acid

a)

False

b)

True

37.

Acid rain has the same pH value as vinegar

a)

True

b)

False

38.

What can turmeric and red cabbage be used for?

a)

To look pretty

b)

As an indicator

c)

As a test for an acid

d)

As a test for acid rain

39.

Examples of an alkali

a)

Soap

b)

Vinegar

c)

Toothpaste

d)

Lemon

40.

What does corrosive mean

a)

It burns your eyes and skin

b)

It itches you

c)

It stings you

d)

It makes you smell nice

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