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Grade 7 Acid/Bases Review

Total questions: 70

Worksheet time: 46mins

Name
Class
Date
1.

A sugar solution has a pH of 7. This means the sugar solution is:

a)

acidic

b)

basic

c)

neutral

2.
When sodium reacts with hydrochloric acid, what is the name of the salt formed?
a)

Sodium Hydride

b)

Sodium Chloride

c)

Sodium Chlorine

3.
When potassium reacts with sulphuric acid, what is the name of the salt produced?
a)

Potassium Sulphur

b)

Potassium Sulphuric

c)

Potassium Sulphate

4.

Which salt will be produced if magnesium react with hydrochloric acid?

a)

Magnesium oxide

b)

Magnesium sulfate

c)

Magnesium chloride

5.

What are the products formed when a metal oxide reacts with an acid?

a)

salt and water

b)

salt

c)

hydrogen gas

d)

salt and hydrogen gas

6.

magnesium oxide + hydrochloric acid =

a)

magnesium chloride and water

b)

magnesium oxide and water

7.

lead oxide + sulphuric acid

a)

lead chloride and water

b)

lead sulphate and hydrogen gas

c)

lead sulphate and water

8.
BASE + ACID ----> SALT +?
a)

water

b)

oxygen

9.

___ + _____ -> sodium nitrate + water

a)

Sodium oxide + nitric acid

b)

Sodium oxide + sulphuric acid

c)

Sodium oxide + hydrochloric acid

10.

Metal oxide + acid -->

a)

salt + water

b)

salt + oxygen

c)

salt + water + carbon dioxide

11.
Base + ____________ -> salt + water
a)

acid

b)

Water

12.

Hydrochloric acid + magnesium oxide --> 

a)

Magnesium chloride + water 

b)

Magnesium + water

13.

Which Salt is form with the following acid- Hydrochloric Acid

a)

Chloride

b)

Sulfate

c)

Nitrate

14.

Which Salt is form with the following acid- Sulfuric Acid

a)

Chloride

b)

Sulfate

c)

Nitrate

15.

Which Salt is form with the following acid- Nitric Acid

a)

Chloride

b)

Sulfate

c)

Nitrate

16.

Chemical symbol for carbon

a)

Ca

b)

Cn

c)

C

d)

Cb

17.

Chemical Symbol for lead

a)

Pb

b)

L

c)

Ld

d)

Le

18.

Chemical symbol for magnesium

a)

Mg

b)

M

c)

Ma

d)

M

19.

Chemical symbol for sodium

a)

So

b)

No

c)

S

d)

Na

20.

Chemical symbol for oxygen

a)

O

b)

Ox

c)

On

d)

Oy

21.

Name this compound MgCl2

a)

magnesium chlorine

b)

chlorine magnesium

c)

magnesium chloride

d)

magneium chlorate

22.

Chemical formula for calcium nitrate

a)

Ca(NO3)2

b)

CaNO

c)

CaNO2

d)

C(NO3)2

23.

Name the following compound: NaNO3

a)

Sodium Nitrogen Oxide

b)

Sodium nitrate

c)

Sodium nitrite

d)

Sodium nitride

24.

What pH range would you get for an acid?

a)

0-6

b)

7

c)

7-14

d)

2-10

25.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
26.

Evidence of a chemical reactions is anything that shows -

a)

a new substance has formed

b)

a solid dissolved in a liquid

c)

interaction between 2 gases

d)

a change in the state of matter

27.

Which is NOT an indication of a chemical change?

a)

temperature change

b)

formation of a precipitate

c)

shape change

d)

production of light

28.

A liquid has a pH of 1. What type of liquid is it?

a)

Acid

b)

Neutral

c)

Alkaline

29.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
30.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
31.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
32.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
33.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
34.
Which is most acidic?
a)
Baking Soda
b)
Lemon Juice
c)
Black Coffee
d)
Milk
35.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
36.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
37.
Feels slippery.
a)
Acids
b)
Bases
c)
All
38.

What might happen if you mixed a strong acid with an equally strong base?

a)

You would see an explosive chemical reaction

b)

The acid would destroy the base

c)

The base would destroy the acid

d)

You'd wind up with a pH-neutral substance

39.

Name the separation technique

a)

Centrifuge

b)

Crystallisation

c)

Distillation

d)

Evaporation

40.

Name the separation technique

a)

Distillation

b)

Crystallisation

c)

Evaporation

d)

Condensation

41.

Name the separation technique

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Separation

42.

In a salt water solution ...

a)

Salt is the solute and water is the solvent

b)

Salt is the solvent and water is the solute

43.

Identify which of the following can be separated by filtration.

a)

Two liquids

b)

Two solids

c)

A solid and a liquid

d)

A gas and a liquid

44.

What method would you use to separate a mixture of salt and water so that you can get keep the salt AND the water?

a)

sorting by hand

b)

distillation

c)

chromatography

45.
In the distillation apparatus shown, what are the parts labelled A and B?
a)
A = funnel, B = thermometer
b)
A = thermometer, B = funnel
c)
A = condenser, B = flask
d)
A = condenser, B = thermometer
46.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = distillate, B = filtrate
b)
A = filtrate, B = residue
c)
A = residue, B = filtrate
d)
A = residue, B = distillate
47.
Which one of the following is a disadvantage of evaporation?
a)
It always requires heat
b)
It cannot be used for insoluble solids
c)
All of the solute is recovered
d)
The solvent (liquid part) is not recovered
48.

What is the name of this separation technique?

a)

distillation

b)

filtration

c)

evaporation

d)

chromatography

49.

A lighted splint was held over a flask in which a gas was given off. The splint went out with a pop. Which gas was given off?

a)

hydrogen

b)

chlorine

c)

oxygen

d)

ammonia

50.

When neutralization reaction happens, they form -

a)

Salt and Sodium Chloride

b)

Salt, Water and Heat

c)

Heat and Sugar

51.

Indicators are -

a)

Substances which are nor Acidic or Basic

b)

Substances that are used to test the Acidic or Basic nature of a substance

c)

Substances which have both chemical and physical properties

d)

None of the Above

52.
Bleach and oven cleaner are:
a)
strong acids
b)
weak acids
c)
strong bases
d)
weak bases
53.
The substance that dissolves the solute in a solution is the ____.
a)
solvent
b)
sour
c)
solute
d)
hydrogen ions
54.

Complete the following word equation:

Metalcarbonate + acid -->

a)

Salt + Hydrogen

b)

Salt + Water + Carbon Dioxide

c)

Salt + Water

55.

How do you remove the water to leave solid copper sulfate crystals?

a)

Filter

b)

Evaporate

c)

Distill

56.

What is the symbol for Copper?

a)

C

b)

co

c)

Cu

d)

CU

57.

What does the word insoluble mean?

a)

Does dissolve

b)

Doesn't dissolve

c)

Is part of a solid

58.

How do you separate an excess insoluble reactant from a solution?

a)

Filtration

b)

Precipitation

c)

Crystalisation

d)

Evaporation

59.

Complete the following word equation:

Metal + Acid -->

a)

Salt + water

b)

Salt + hydrogen

c)

Salt + Water + Carbon dioxide

60.

Crystallisation is used to separate ____ from a liquid.

a)

undissolved liquid

b)

dissolved liquid

c)

undissolved solid

d)

dissolved solid

61.

When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution?

a)

Filtration

b)

Neutralisation

c)

Condensation

d)

Evaporation/crystallisation

62.

This change is a

a)

chemical reaction

b)

physical change

c)

musical change

d)

all answers are correct

63.

When energy like heat and light are given off in a chemical reaction it is called

a)

exothermic

b)

endothermic

c)

eccentric

d)

ectomorphic

64.

Signs of a chemical change could be:

a)

a change in energy (temperature, light, sound)

b)

a precipitate forms (a solid forms from 2 liquids)

c)

formation of gas (bubbles)

d)

shocking change in color

e)

all of these answers are signs of chemical change

65.

Magnesium + hydrochloric acid-->

a)

Magnesium chloride + water

b)

Magnesium chloride + hydrogen

c)

Magnesium hydrochloride + hydrogen

d)

Magnesium chloride + water + carbon dioxide

66.

Iron + hydrochloric acid -->

a)

Iron chloride + hydrogen

b)

Iron chloride + carbondioxide

c)

Iron hydroxide + acid

d)

Iron chloric + hydrogen

67.

How do we test for hydrogen?

a)

Squeaky pop test

b)

Hydrogen extinguishes a lit splint

c)

Bubbling through lime water

d)

Hydrogen makes a glowing splint relight

68.

The two tests for carbon dioxide are ...

a)

It will extinguish a lit splint

b)

It will cause a squeaky pop

c)

It will explode

d)

When bubbled through lime water it turns the water cloudy

69.

Which salt will e produced if copper carbonate react with hydrochloric acid....

a)

Copper carbonate

b)

Copper chloride

c)

Water

d)

Carbon dioxide

70.

What gas is always produced when a metal reacts with acid?

a)

Oxygen

b)

Hydrogen

c)

Carbon dioxide

d)

Nitrogen

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