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WorksheetsYear 9 Chemistry Revision
Total questions: 40
Worksheet time: 22mins
Name
Class
Date
1.
A chemical reaction that produces energy is a /an
a)
endothermic reaction
b)
exothermic reaction
c)
energy
d)
chemical reaction
2.
Which of the following reactions is a combustion reaction ?
a)
MgCO3 + O2 → MgO + CO2
b)
C3H8 + 5O2 → 3CO2 + 4H2O
c)
6CO2 + 6H2O → C6H12O6 + 6O2
d)
6CO2 + 6H2O → C6H12O6 + 6O2
3.
What is the law of Conservation of Mass?
a)
A measure of how much mass is created or destroyed.
b)
Mass can neither be created nor destroyed during a chemical reaction.
4.
A Harry Potter Question. How does the "transfiguration" of a cat into a Professor violate the Law of Conservation of Mass?
a)
Mass can neither be created nor destroyed.
b)
About 50Kg are lost or gained on the transfiguration
c)
Either the cat would have to be 110 pounds, or the person 10 pounds
d)
all of these
5.
The compounds or elements present at the end of a reaction
a)
reactants
b)
catalyst
c)
products
d)
energy
6.
The compounds and elements that are present at the beginning of a reaction:
a)
reactants
b)
catalyst
c)
products
d)
energy
7.
A chemical change happens when...
a)
a substance is changed at the atomic level
b)
bonds are broken and formed
c)
a new substance is made
d)
all of the above!
8.
What kind of change is a change of state?
a)
Physical
b)
Chemical
9.
What is released in a combustion reaction?
a)
Oxygen and water
b)
Oxygen and carbon dioxide
c)
Carbon dioxide and water
d)
Water and hydrogen
10.
How can we test for the products of combustion?
a)
Re-light a splint and limewater
b)
Cobalt chloride paper and squeaky pop test
c)
Squeaky pop test and limewater
d)
Limewater and cobalt chloride paper
11.
Which gas is responsible for acid rain?
a)
Carbon monoxide
b)
Sulfur dioxide
c)
Carbon dioxide
d)
Sulfur trioxide
12.
Which of the following are responsible for global dimming?
a)
Particles
b)
Particulates
c)
Sulfur dioxide
d)
Carbon monoxide
13.
The element symbol for Potassium is ...
a)
P
b)
Po
c)
Pt
d)
K
14.
Sodium's chemical symbol is...
a)
S
b)
So
c)
Na
d)
K
15.
If ethene is your monomer, what would your polymer be called?
a)
Polypropene
b)
Polytetrachloride
c)
Polyethene
d)
Polyethane
16.
One example of a chemical change is
a)
filtering a mixture
b)
burning wood
c)
boiling water
d)
crushing a can
17.
Bronze is an alloy of:
a)
Copper and tin
b)
Copper and zinc
c)
Copper and magnesium
d)
Copper and sodium
18.
Steel is an alloy of
a)
Copper and brass
b)
Iron and brass
c)
Carbon and brass
d)
Iron and carbon
19.
Rust can be prevented by zinc plating. This is called:
a)
Galvanizing
b)
Anodising
c)
Thermalizing
d)
Proton capture
20.
Crude oil contains many compounds. The compounds are mainly
a)
Coal
b)
Ammonia
c)
Alcohols
d)
Hydrocarbons
21.
Magnesium + Hydrochloric acid -->
a)
Magnesium hydride
b)
Sodium chloride
c)
Magnesium chloride
d)
Magnesium sulfate
22.
How can the gas hydrogen be tested for?
a)
Relights a splint
b)
Limewater goes cloudy
c)
Squeaky pop test
d)
Puts out a lit flame
23.
What is the general word equation for a metal and acid reaction?
a)
metal + acid --> salt
b)
metal + acid --> salt + hydrogen
c)
metal + acid --> oxygen + hydrogen
d)
metal + acid --> oxygen + water
24.
The general word equation for metal and oxygen reactions is....
a)
metal + oxygen --> water + hydrogen
b)
metal + oxygen --> hydrogen
c)
metal + oxygen --> water
d)
metal + oxygen --> metal oxide
25.
What is produced when calcium is burned in air?
a)
hydrogen
b)
carbon dioxide
c)
calcium oxide
d)
calcium hydroxide
26.
Three alkali metals are...
a)
calcium, magesium, barium
b)
lithium, sodium, potassium
c)
gold, silver, platinum
d)
aluminium, cobalt, nickel
27.
Metal and water word equation...
a)
metal + water --> metal oxide + oxygen
b)
metal + water --> metal hydroxide + hydrogen
c)
metal + water --> metal hydride + hydroge
d)
metal + water --> carbon dioxide + water
28.
When a more reactive metal takes the place of a less reactive metal in a compound...
a)
oxidation
b)
reduction
c)
displacement
d)
acidity
29.
magnesium would displace oxygen from zinc oxide
a)
True
b)
False
30.
Copper would displace oxygen from lead oxide
a)
true
b)
false
31.
Two categories of polymers are...
a)
Natural and synthentic
b)
Man made and synthetic
c)
Hard and soft
d)
Strong and weak
32.
Melting crayons is a example of a
a)
Physical property
b)
Physical change
c)
Chemical property
d)
Chemical change
33.
Souring milk is an example of a
a)
Physical property
b)
Physical change
c)
Chemical property
d)
Chemical change
34.
Which of the following is NOT a mixture?
a)
NaCl + H2O
b)
C6H12O6 + H2O
c)
C6H12O6
d)
SiO2 +H2O
35.
Which type of mixture is this?
a)
Element only
b)
compounds only
c)
elements and compounds
d)
Concoction
36.
Which type of mixture is this?
a)
Element only
b)
Compound only
c)
Element and compound
d)
Miscellany
37.
Which of the following is a compound?
a)
sodium
b)
sea water
c)
carbon dioxide
d)
brass
38.
Which of the following is the correct name for MgCl2?
a)
magnesium chlorine
b)
magnesium dichlorine
c)
magnesium chloride
d)
magnesium dichloride
39.
What is an example of an element that doesn't like to react with anything?
a)
Neon
b)
Oxygen
c)
Hydrogen
d)
Carbon
40.
The name of the chemical symbol Ar is ...
a)
Argon
b)
Argean
c)
Agreon
d)
Armanon
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