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Year 9 Chemical Reactions Test - Revision Quiz

Total questions: 57

Worksheet time: 56mins

Name
Class
Date
1.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
2.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
3.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
4.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
5.
Balance this equation...
HgO --> Hg + O2
a)
It is balanced 
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
d)
I don't know...Oh well!
6.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
a)
balanced
b)
unbalanced
7.

In reactions, products must be equal to..

a)

Products

b)

Reactants

c)

Starters

d)

Enders

8.

According to the law of conservation of mass, how does the amount of each element on the product side compare to each element on the reactant side?

a)

The amount of atoms on each side is equal

b)

The amount of atoms on the product side is greater

c)

The amount of atoms on the reactant side is greater

d)

Depends on the reaction

9.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
10.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
11.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
12.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
13.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
14.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
15.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
16.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
17.

What are the types of equations that can be used?

a)

Word equations and chemical equations

b)

Word equations and balanced equations

c)

Reactants and products

18.

In a chemical reaction

a)

New substances are formed, old substances disappear

b)

There are reactants and products

c)

Energy is either absorbed or given off

d)

All are correct

19.

methane + oxygen --> carbon dioxide + water

a)

Combustion

b)

Single displacement

c)

Acid and base

20.

What are the reactants?

a)

Starting material of the chemical reaction

b)

New substances formed by the chemical reaction

21.

What are the products?

a)

Starting material of the chemical reaction

b)

New substances formed by the chemical reaction

22.

What is the word equation? When propanol is burnt in oxygen gas, carbon dioxide and water are formed

a)

propanol + carbon dioxide --> water + oxygen

b)

propanol + water --> carbon dioxide + oxygen

c)

propanol + oxygen --> carbon dioxide + water

d)

propanol --> carbon dioxide + water

23.

Word equations...

a)

Show reactants and products as well as the amount of each in a reaction

b)

Show reactants and products but not the amount of each in a reaction

24.

How many grams of reactants will I have if I end up with 50g of products?

a)

50g

b)

25g

c)

100g

25.

16g of methane react with 32g of oxygen to form 44g of carbon dioxide and 4g of water. What are the products?

a)

methane and oxygen

b)

water and carbon dioxide

c)

carbon dioxide and oxygen

d)

water

26.

When two or more substances react to form a new product it is a

a)

chemical equation

b)

chemical formula

c)

chemical reaction

d)

chemical production

27.

32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water.

a)

32

b)

40

c)

8

d)

48

28.
a substance formed when two or more elements are chemically bonded together
a)
Element Soup
b)
Pure Element
c)
Ion
d)
Compound
29.
tells us the number of atoms of each element in a compound
a)
Coeffecient
b)
Exponent
c)
Chemical Formula
d)
Calculator
30.
the symbolic representation of a chemical reaction
a)
Long Hand
b)
Short Hand
c)
Electron Configuration
d)
Chemical Equation
31.
a process or reaction in which the system absorbs energy from its surroundings; usually, but not always, in the form of heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
32.
a chemical reaction that releases energy by light or heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
33.

Which of the following statements is true concerning acids and bases?

a)

acids and bases don't react with each other

b)

acids mixed with bases neutralize each other

c)

acids mixed with bases make stronger bases

d)

acids mixed with bases make stronger acids

34.

Which is the correct set of acid properties:

a)

sour taste, corrosive, change litmus from red to blue

b)

sour taste, corrosive, change litmus from blue to red

c)

sweet taste, slippery, change litmus from blue to red

d)

sour taste, slippery, change litmus from blue to red

35.

Neutral solutions have a pH of:

a)

0

b)

1

c)

7

d)

14

36.

Vinegar, fruit juice, and cola are examples of:

a)

salts

b)

neutral substances

c)

bases

d)

acids

37.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

38.

Is laundry detergent an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

39.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

40.

The pH scale is a range from:

a)

1-7

b)

0-14

c)

1-5

d)

1-14

41.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
42.

A solution with a pH of 8.6 would be a(n)

a)

Acid

b)

Base

c)

Neutral

d)

Acid and Base

43.

This type of solutions tastes bitter.

a)

Acids

b)

Bases

c)

None of the following

d)

Acids & Bases

44.

These can burn you if they are strong enough.

a)

Acids

b)

Bases

c)

Water

d)

Acids & Bases

45.

This ion is responsible for the properties of acids

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

46.

This ion is responsible for the properties of bases

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

47.

Most molecules in a concentrated acid release H+ ions whereas only a few molecules in a dilute acid release H+ ions

a)

True

b)

False

48.

Dilute acids....

a)

Can be consumed

b)

Have a small amount of water and large amount of acid

c)

Have a large amount of water and small amount of acid

d)

Release OH- molecules

49.

Metal + acid -----> _____________ + ______________

a)

Base, salt

b)

Salt, hydrogen

c)

Carbon dioxide, air

d)

Water, air

50.

Carbonate + acid -----> _____________ + ______________ + _____________

a)

Salt, carbon dioxide, water

b)

Carbon dioxide, hydrogen, water

c)

Base, helium, air

d)

Salt, hydrogen, water

51.

Sodium carbonate (or washing soda) is a _________

a)

Acid

b)

Base

52.

What is the purpose of conducting a 'pop' test?

a)

To test whether a substance is an acid or a base

b)

To test whether carbon dioxide was produced

c)

To test whether hydrogen gas was produced

d)

To have some fun with matches

53.

Which of these compounds is NOT an acid?

a)

HCl

b)

H2SO4

c)

CH3COOH

d)

H2O

54.

A neutralisation reaction produces...

a)

Acids

b)

Bases

c)

neutral water

d)

pH > 7

55.

The formula for sulfuric acid is...

a)

HCl

b)

H2Cl

c)

H2SO4

d)

HSO4

56.

H+ + OH- --> H2O Is a chemical equation showing...

a)

A neutralisation reaction

b)

An acid-metal reaction

c)

An acid-carbonate reaction

57.

Which of these compounds is NOT an acid?

a)

HCl

b)

H2SO4

c)

CH3COOH

d)

NaOH

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