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acid and alkaline

Total questions: 101

Worksheet time: 2hrs 54mins

Name
Class
Date
1.

WHAT ARE THE PROPERTIES OF ACID ?

a)

Acids are corrosive, sour,

b)

Lemon

c)

Mint

d)

tastes bitter

2.

What is the pH of Lemon

a)

3.5

b)

14

c)

2.0

d)

1.7

3.
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
4.
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
5.

Which are the examples of bases

a)

Drain cleaner

b)

Battery Acid

c)

Lime water

d)

Milk

6.

How to neutralise wasp sting

a)

baking soda

b)

vinegar

c)

Lime water

d)

Drain cleaner

7.

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

8.

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

a)

Methyl orange

b)

Litmus paper

c)

Phenolphthalein

d)

Universal indicator

9.

Is this neutralised wasp sting and vinegar

a)

Yes

b)

No

10.

What can neutralise a strong base

a)

Neutral

b)

Weak base

c)

Base

d)

Hydrochloric acid (pH of 3.01)

11.

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

12.

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

a)

positive

b)

negative

13.
products of a neutralisation reaction are always
a)
an acid and a base
b)
an acid and a salt
c)
salt and water
d)
salt and base
14.
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
15.

What type of reaction occurs when you react an acid with an alkali?

a)

combustion

b)

decomposition

c)

no reaction

d)

neutralisation

16.

What colour is Universal indicator when the solution is neutral?

a)

Red

b)

Green

c)

Blue

d)

Purple

17.

What sort of reaction happens when an acid and an alkali are mixed?

a)

Neutralisation

b)

Combination

c)

Acidifying

d)

Displacement

18.

Why is toothpaste alkaline?

a)

It can neutralise strong alkaline in

your mouth

b)

It can neutralise acid in

your mouth

c)

It can refresh your teeth

d)

Toothpaste is not alkaline.

19.

Where does the acid in you mouth come from?

a)

From stomach

b)

From stomach acid

c)

From the millions of

bacteria of mouth

d)

From the teeth

20.

... are used to neutralise acid in the stomach.

a)

Toothpastes

b)

Bacterias

c)

Antacids

d)

More strong acids

21.

... put a question for investigation in a way that can be tested.

a)

Scientists

b)

Builders

c)

Socialists

d)

Writers

22.

What colour is litmus in solution of pH 4?

a)

green

b)

red

c)

blue

d)

dark blue

23.

Which of the following values would represent the pH of a strong base?

a)

1

b)

8

c)

7

d)

13

24.

Which of the following values would represent the pH of a strong acid?

a)

1

b)

6

c)

7

d)

13

25.

What range of values on the pH scale represent solutions with a higher ratio of hydronium (H3O+) ions?

a)

0-14

b)

below 7

c)

7

d)

above 7

26.

What range of values on the pH scale represent solutions with a higher ratio of hydroxide (OH-) ions?

a)

below 7

b)

7

c)

above 7

d)

0-14

27.

When found in food, acids often taste ________.

a)

Sour

b)

Bitter

c)

Salty

d)

Slippery

28.

When found in food, bases often taste _______.

a)

Sour

b)

Bitter

c)

Salty

d)

Soggy

29.

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

a)

The substance has a pH value of "2".

b)

The substance is a base.

c)

The substance has a pH value of "7".

d)

The substance is acidic.

30.

Ocean water has a pH value near "8". It would be classified as...

a)

slightly acidic

b)

a strong base

c)

a neutral substance

d)

slightly basic (alkaline)

31.

Four solutions are tested and found to have the following pH values. Which of these substances would be considered the weakest acid?

a)

Lemon Juice - pH=2

b)

Apple Juice - pH=4.5

c)

Shower Cleaner - pH=5.5

d)

Hydrogen Peroxide - pH=7

32.

Many cleaning solutions are bases. Which of the following is a common property among basic solutions?

a)

slippery feel

b)

white color

c)

salty taste

d)

sour taste

33.

Pure water (H2O) has a pH of 7 and would be classified as...

a)

a base

b)

a neutral substance

c)

both an acid and a base

d)

an acid

34.

Acidic solutions exhibit a higher ratio of H3O+ ions, known as...

a)

neutrons

b)

hydroxide

c)

electrons

d)

hydronium

35.

The products of a neutralization reaction are usually...

a)

salt and water

b)

an acid and a base

c)

a neutral solution

d)

carbon dioxide and oxygen

36.

The reactants in a neutralization reaction are always...

a)

salt and water

b)

an acid and a base

c)

a neutral solution

d)

carbon dioxide and oxygen

37.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
38.
Turns litmus blue.
a)
Acids
b)
Bases
c)
Salts
d)
All
39.

Acids are __________, which means they "eat away" at other materials.

a)

transitional metal

b)

alkaline

c)

flammable

d)

corrosive

40.
A solution with a pH of 7 is________
a)
increasing
b)
neutral
c)
decreasing
d)
apple juice
41.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
42.

What is the hazard shown in this hazard sign?

a)

Explosive

b)

Corrosive

c)

Irritant

d)

High level Irritant

43.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
44.
What colour is universal indicator in a neutral solution?
a)
Green
b)
Orange
c)
Purple
d)
Red
45.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
46.

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

a)

Able to turn blue litmus paper red

b)

Corrosive

c)

Sour

d)

Sweet

47.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
48.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
49.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
50.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
51.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
52.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
53.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
54.

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

a)

13

b)

10.5

c)

1

d)

2

55.

Acid + Alkali --> Salt + Water

a)

neutralization reaction

b)

synthesis

c)

decomposition

d)

single displacement

56.
A neutralization reaction will always produce...
a)
water & salt
b)
water
c)
salt
d)
water & carbon
57.

Indicator that only changes colour at pH = 7

a)

Universal indicator

b)

Litmus paper

58.

Acids are source of

a)

hydrogen ions

b)

hydroxide ions

59.

Alkalis are source of

a)

hydrogen ions

b)

hydroxide ions

60.

Which of the following about properties of acid is not true?

a)

pH less than 7

b)

Tastes bitter

c)

Corrosive

d)

Turns blue litmus paper to red

61.

Acid reacts with metal to produce ___________ gas.

a)

oxygen

b)

carbon dioxide

c)

hydrogen

d)

nitrogen dioxide

62.

Which of the following will change the red litmus paper to blue?

a)

Sodium hydroxide

b)

Hydrochloric acid

c)

Sulphuric acid

d)

Nitric acid

63.

Which of the following indicator will show different colour in acid, neutral and alkali?

a)

Phenolphtalein

b)

Universal indicator

c)

Methyl orange

d)

Litmus paper

64.

__________ is used to make fizzy drink.

a)

Vinegar

b)

Sulphuric acid

c)

Carbonic acid

d)

Acetic acid

65.

Sodium hydroxide is used

a)

to make fertilisers.

b)

to make battery.

c)

to cure gastritis.

d)

to make detergent.

66.

The chemical reaction between an acid and alkali is called

a)

respiration.

b)

combustion.

c)

neutralisation.

d)

photosynthesis.

67.

Hydrochloric acid + Sodium hyroxide  →\rightarrow   ____________ + Water

a)

Sodium sulphate

b)

Sodium chloride

c)

Sodium nitrate

68.

________ + Potassium hydroxide  →\rightarrow  Potassium sulphate + Water

a)

Sulphuric acid

b)

Hydrochloric acid

c)

Nitric acid

69.

Nitric acid + __________  →\rightarrow  Sodium nitrate + Water

a)

Aluminium oxide

b)

Magnesium hydroxide

c)

Sodium hydroxide

70.

The technique used in neutralisation is called

a)

filtration.

b)

titration.

71.

Salt and water are produced when acid reacts with alkali. Salt produced is

a)

acidic.

b)

alkaline.

c)

neutral.

72.

______ facial cleanser can be neutralised by _______ facial toner.

a)

Acidic, acidic

b)

Acidic, alkaline

c)

Alkaline, alkaline

d)

Alkaline, acidic

73.

Which of the following can help to neutralise bee sting?

a)

Vinegar

b)

Toothpaste

74.

Waste substances from factories will be treated with _________ before being discharge into the river.

a)

acid

b)

alkali

75.
If a substance has a pH of 10 it is considered
a)
Acidic
b)
Basic
c)
Neutral
76.
Acids produce _________ ions when they break down or dissocciate. 
a)
Hydroxide (OH-)
b)
Water
c)
Chlorine (Cl-)
d)
Hydrogen (H+)
77.
Bases release ____________ ions when they break down or dissociate. 
a)
Hydrogen (H+)
b)
Hydroxide (OH-)
c)
Chlorine (Cl-)
d)
no
78.
Water is neutral because the number of hydrogen and hydroxide ions is _________.
a)
the same
b)
different
79.
The pH scale ranges from ____________.
a)
0-7
b)
1-100
c)
1-20
d)
0-14
80.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
81.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
82.
H2C2O4
a)
carbonic acid
b)
chromic acid
c)
chloric acid
d)
oxalic acid
83.
H2SO3
a)
sulfuric acid
b)
hydrosulfuric acid
c)
sulfurous acid
d)
persulfuric acid
84.
chlorous acid
a)
HClO3
b)
HClO2
c)
HClO
d)
HCl
85.
HF
a)
flouric acid
b)
hydrofluoric acid
c)
fluorate acid
d)
hydrogen fluoridic acid
86.
HI
a)
iodic acid
b)
hydroiodic acid
c)
iodous acid
d)
hypoiodous acid
87.
hydrochloric acid
a)
HClO3
b)
HClO2
c)
HClO
d)
HCl
88.
nitrous acid
a)
H2NO3
b)
HNO3
c)
HNO2
d)
H2NO2
89.
Select the name for the following acid: H3PO4
a)
Phosphoric acid
b)
Phosphorous acid
c)
Hydrophosphoric acid
90.
What is an acid?
a)
a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red
b)
Has a pH of 11
c)
Has a pH of 7
91.
What is a base?
a)
Has a pH of 3
b)
Has a pH of 7
c)
substances that are slippery to the touch; turns red litmus paper blue
92.
Which of the following statements about acids is true?
a)
They taste sweet.
b)
They taste sour.
c)
They have a pH between 8-14.
93.
Which item is an acid?
a)
Drain cleaner
b)
Ammonia
c)
An orange.
94.
What does a pH scale do?
a)
Tells if a substance is an acid or base
b)
Measures the strength and weakness of acids and bases
c)
Both statements are correct
95.
You can eat or drink an acid.
a)
True 
b)
False
96.
Rainwater is an acid.
a)
True 
b)
False
97.
You can eat or drink a base.
a)
True
b)
False
98.
Vinegar is a base.
a)
True
b)
False
99.
What is another name for a base?
a)
Acid
b)
Alkaline
c)
pH
100.
Which of the following describes a battery?
a)
Acid 
b)
Base
101.
What is the pH of water?
a)
11
b)
4
c)
7

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