WorksheetsRusting/chemical reactions
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
What element rusts?
a)
carbon
b)
iron
c)
manganese
d)
potassium
2.
What environmental element assists rusting?
a)
nitrogen
b)
carbon
c)
oxygen
d)
hydrogen
3.
Which type of metal doesn't rust at all?
a)
steel
b)
iron
c)
copper
4.
A rusting bicycle
a)
physical change
b)
chemical change
5.
What conditions are required for rusting?
a)
dry cold conditions
b)
hot damp conditions
c)
dry hot conditions
6.
Which metals can rust?
a)
All metals
b)
Only Iron
c)
Metals more reactive than Iron
7.
Rusting is an example of
a)
oxidation
b)
reduction
8.
When a scientist mixed two chemicals, an exothermic reaction takes place. Which of the following would be proof that the reaction was exothermic?
a)
a change of color
b)
a change of state
c)
a temperature decrease
d)
a temperature increase
9.
What types of reactions absorb and release heat?
a)
acidic and basic
b)
endothermic and exothermic
c)
endothermic and heat transfusion
d)
covalent and ionic
10.
A scientist combines chemicals and produces an exothermic reaction. What byproduct of this reaction would show that it is exothermic?
a)
heat
b)
coolness
c)
a precipitate
d)
gas bubbles
11.
Which of the following is a chemical change?
a)
water freezes to form ice
b)
sugar dissolves in water
c)
gasoline burns in a car engine
d)
a piece of metal expands when it is heated
12.
In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.
a)
reactants
b)
products
c)
neutrals
d)
energizers
13.
A change in the shape of an object is an example of _________________.
a)
a chemical change
b)
energy
c)
an endothermic change
d)
a physical change
14.
Which of the following is a chemical change?
a)
the rusting of iron
b)
dissolving salt in water
c)
melting an ice cube
d)
bending a copper wire
15.
Which of the following is an example of a chemical change?
a)
rusting of a bicycle
b)
painting a house
c)
washing a dog
d)
tearing up a newspaper
16.
If you combine two substances in a beaker at room temperature and the beaker feels cold to the touch, it means that the substances:
a)
have not reacted with each other
b)
have undergone an endothermic reaction
c)
have undergone a physical change
d)
have undergone an exothermic reaction
17.
In any chemical reaction, the mass of the products is always:
a)
slightly less than the mass of the reactants
b)
much less than the mass of the reactants
c)
the same as the mass of the reactants
d)
greater than the mass of the reactants
18.
Raising the temperature of a chemical reaction would make the reaction __________________.
a)
happen slower
b)
happen faster
c)
stop completely
d)
proceed as normal
19.
How do chemical reactions turn substances into new substances?
a)
with burning acid
b)
the molecules mix together and create new substances
c)
the atoms break apart and combine back together in new ways
d)
the ionic compounds mix in water to form solutions
20.
Metals that react quickly/strongly with water and acids are called?
a)
Reactive
b)
Unreactive
c)
Dangerous
d)
Corrosive
21.
How can you tell that a metal is reacting with water?
a)
Colour change
b)
Bright light
c)
Fizzing
d)
It gets colder
22.
How can you test to show that when a metal reacts with water, hydrogen gas is produced?
a)
Relights a glowing splint
b)
A lit splint produces a squeaky pop
c)
Puts out a burning splint
d)
Is cold to the touch
23.
What gas is produced when a metal reacts with an acid?
a)
Water vapour
b)
Acidic gas
c)
Hydrogen
d)
Nitrogen
24.
Which salt will be produced if magnesium react with hydrochloric acid?
a)
Magnesium oxide
b)
Magnesium sulfate
c)
Magnesium sulfide
d)
Magnesium chloride
25.
What are the products for the reaction of metal with acid?
Metal + acid ---> metal salt + hydrogen
Metal + acid ---> metal salt + hydrogen
a)
Metal salt and hydrogen
b)
Metal salt
c)
Metal
d)
Acid
26.
What can you conclude if a metal doesn't fizz when added to water or an acid?
a)
It has low reactivity
b)
It may react with a stronger acid
c)
It has high reactivity
d)
There is no metal present
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