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acid and base 1

Total questions: 68

Worksheet time: 35mins

Name
Class
Date
1.
Which of the following substances contain acid?
a)
An orange
b)
Bleach
c)
Distilled water
d)
Washing powder
2.
Which of the following substances contain an alkali?
a)
Baking powder
b)
Coca cola
c)
Distilled water
d)
Vinegar
3.
Which of the following pH numbers indicates a neutral substance?
a)
1
b)
5
c)
7
d)
14
4.
Which of the following pH numbers indicates a strong acid?
a)
1
b)
5
c)
7
d)
14
5.
Which of the following pH numbers indicate a strong alkali?
a)
1
b)
5
c)
7
d)
14
6.
What is the pH of pure water?
a)
pH 7
b)
pH 3
c)
pH 12
d)
pH 8
7.
What two substance are formed when an acid and alkali react together in equal amounts?
a)
Salt and water
b)
Alkali and water
c)
Acid and water
d)
Acid and alkali
8.
What substance could you use to test if a substance is an acid or alkali?
a)
Indicator
b)
Salt
c)
Catalyst
d)
Water
9.
When found in food, acids are ________
a)
Sour
b)
Bitter
c)
Salty
d)
Slippery
10.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
 hydrogen (H+) ions
d)
 hydroxide (OH-) ions
11.
A common alkali used in the lab is
a)
hydrochloric acid
b)
sodium chloride
c)
hydrogen sulphate
d)
sodium hydroxide
12.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
13.

Acid in vinegar:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

14.

When dissolved in water, bases produce:

a)

bases

b)

salts

c)

hydrogen (H+) ions

d)

hydroxide (OH-) ions

15.

Which of the following is not the properties of alkalis?

a)

Slipery

b)

Have a pH less than 7

c)

The pH scale of alkalis from 8 - 14

d)

Corrosive

16.

Which of the following is acid?

a)
b)
c)
17.

Which of the following is alkali?

a)
b)
c)
18.

Which of the following is neutral?

a)
b)
c)
19.

Acid + Alkali → .... + WaterAcid\ +\ Alkali\ \rightarrow\ ....\ +\ Water  

a)

Hydrogen

b)

Water

c)

Carbon dioxide

d)

Salt

20.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

21.

WHAT ARE THE PROPERTIES OF ACID ?

a)

Acids are corrosive, sour,

b)

Lemon

c)

Mint

d)

tastes bitter

22.

What is the pH of Lemon

a)

3.5

b)

14

c)

2.0

d)

1.7

23.
Soap is a weak base.  What is true about the taste of bases?
a)
they taste sour
b)
they taste sweet
c)
they taste bitter
d)
they taste salty
24.
Which of these solutions is an acid?
a)
Dish Soap: pH of 12
b)
Tomato Soup: pH of 4
c)
Baking Soda: pH of 9
d)
Drain Cleaner: pH of 14
25.

Which are the examples of bases

a)

Drain cleaner

b)

Battery Acid

c)

Lime water

d)

Milk

26.

How to neutralise wasp sting

a)

baking soda

b)

vinegar

c)

Lime water

d)

Drain cleaner

27.

From which point to which point in the pH scale is Base

a)

7.1- 14

b)

0- 6.9

c)

6.2- 9.1

d)

12- 14

28.

in which Acid base indicator is Acid is colourless base is pink

a)

Methyl orange

b)

Litmus paper

c)

Phenolphthalein

d)

Universal indicator

29.

Is this neutralised wasp sting and vinegar

a)

Yes

b)

No

30.

What can neutralise a strong base

a)

Neutral

b)

Weak base

c)

Base

d)

Hydrochloric acid (pH of 3.01)

31.

Differentiate between Base and alkaline

a)

Alkaline is corrosive and base is bitter

b)

Alkaline is blue in colour and base is red in colour

c)

Alkaline is soluble and base is insoluble

d)

alkaline is insoluble and base is soluble

32.

An acid is a solution that contains __________ ions dissolved in water.

a)

positive

b)

negative

33.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
34.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
35.
Electrolyte
a)
Acids
b)
Bases
c)
Salts
d)
All
36.
Feels slippery.
a)
Acids
b)
Bases
c)
All
37.
Salt water did not react with the Red or Blue litmus paper.  This must mean
a)
Salt water is a Base
b)
Salt water is an Acid
c)
Salt water is neutral
d)
Salt water is charged
38.
All solutions that fall between 0 and 6.9 are
a)
Acids
b)
Bases
c)
Neutral
d)
Phytoplankton
39.
Which is most acidic?
a)
milk
b)
Lemon Juice
c)
bleach
40.
What is the range of pH values in a basic solution?
a)
0-6
b)
8-14
c)
7
d)
0-14
41.
The pH of a concentrated acid
a)
0
b)
7
c)
14
d)
6
42.
An organic substance that changes color in the presence of an acid or base
a)
indicator
b)
inhibitor
c)
catalyst
d)
salt
43.
BASE + ACID ----> SALT +?
a)
water
b)
oxygen
c)
hydrogen ion
d)
hydroxide ion
44.
Which of the following is NOT a strong acid?
a)
HCl
b)
HClO5
c)
H2SO4
d)
HNO3
45.
Acids react with
a)
water to produce bases and salts
b)
salts to produce bases and water
c)
neither bases, salts nor water
d)
bases to produce salts and water
46.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

47.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
48.

WHAT ARE THE PROPERTIES OF ACID ?

a)

Acids are corrosive, sour,

b)

Lemon

c)

Mint

d)

tastes bitter

49.
Soap is a weak base.  What is true about the taste of bases?
a)
they taste sour
b)
they taste sweet
c)
they taste bitter
d)
they taste salty
50.
Which of these solutions is an acid?
a)
Dish Soap: pH of 12
b)
Tomato Soup: pH of 4
c)
Baking Soda: pH of 9
d)
Drain Cleaner: pH of 14
51.

How to neutralise wasp sting

a)

baking soda

b)

vinegar

c)

Lime water

d)

Drain cleaner

52.

From which point to which point in the pH scale is Base

a)

7.1- 14

b)

0- 6.9

c)

6.2- 9.1

d)

12- 14

53.

What is an acid ?

a)

is only base

b)

Sticky substance

c)

A liquid substance that can dissolve metal and may burn our skin

d)

none of them

54.

What is a base ?

a)

A shape

b)

Simple thing

c)

A substance which is slippery to touch

d)

none off them

55.

When acid and base is mixed what is the result ?

a)

Nothing

b)

Neutral reaction

c)

None of them

56.

Lemon ! It tastes _______. It must be an acidic in nature.

a)

Sweet

b)

Sour

c)

Bitter

d)

all of them

57.

Two type of acids?

a)

Strong acid

b)

Weak acid

c)

Strong and weak acid

d)

Mineral and organic acid

58.

Which acid is called the king of chemicals?

a)

Acetic acid

b)

Hydrochloric acid

c)

Nitric acid

d)

Sulphuric acid

59.

Which acid is present in vinegar?

a)

Nitric acid

b)

Sulphuric acid

c)

Acetic acid

d)

Hydrochloric acid

60.

Which of the following is a weak mineral acid?

a)

Carbonic acid

b)

Acetic acid

c)

Lactic acid

d)

Hydrochloric acid

61.

Which of the following is used to neutralise bee strings?

a)

Vinegar

b)

Calamine lotion

c)

Quicklime

d)

Baking soda

62.

Which of the following cannot be used as an indicator?

a)

Turmeric

b)

Onion

c)

Sugar

d)

Beetroot

63.

Which of the following is a salt ?

a)

Potash alum

b)

Potassium hydroxide

c)

Silver nitrate

d)

Both a and c

64.

Which acid is used to remove deposits from the inside of the boilers?

a)

Acetic acid

b)

Hydrochloric acid

c)

Sulphuric acid

d)

Carbonic acid

65.

Which of the following is a strong base?

a)

Cu(oh)2

b)

Zn(OH)2

c)

KOH

d)

NH4 OH

66.

Which of the following pH values represent a strong alkali?

a)

pH=2

b)

pH=7

c)

pH=10

d)

pH=13

67.

Which of the following is a characteristic property of most of the salts ?

a)

High melting point

b)

Insoluble in water

c)

Liquid at room temperature

d)

Low boiling point

68.

What is used to unblock drains?

a)

Sodium hydroxide

b)

Milk of magnesia

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