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Worksheets9 Chem Revision
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
In an exothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released
2.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released
3.
Is photosynthesis an exothermic or endothermic reaction?
a)
Endothermic
b)
Exothermic
c)
Neither
4.
When 2 reactants combine and the product has LESS energy that the reactants, what happens to the heat?
a)
heat is absorbed
b)
heat is released
c)
nothing happens
d)
heat is transformed
5.
red and blue litmus paper were dipped in an unknown substance. There was no change in their color. What conclusion could you make about the unknown substance?
a)
It is an acid.
b)
It is a base.
c)
It is neutral.
d)
No reaction happened.
6.
What gas is always produced when a metal reacts with water?
a)
Oxygen
b)
Carbon dioxide
c)
Hydrogen
d)
Carbon monoxide
7.
Which salt will be produced if magnesium react with hydrochloric acid?
a)
Magnesium oxide
b)
Magnesium sulfate
c)
Magnesium sulfide
d)
Magnesium chloride
8.
What are the reactants for the reaction of metal with acid?
Metal + acid ---> metal salt + hydrogen
Metal + acid ---> metal salt + hydrogen
a)
Hydrogen
b)
Metal salt
c)
Metal
d)
Metal and acid
9.
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
10.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
11.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
12.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
13.
In another reaction, the student places a piece of metal into a test tube and adds an acid again. Its fizzes ..
The gas produced is called...
The gas produced is called...
a)
nitrogen
b)
Oxygen gas
c)
sulphur dioxide
d)
Hydrogen gas
14.
Some hydrochloric acid is added to marble chips in a test tube. The marble chips is....
a)
Lead nitrate
b)
Calcium carbonate
c)
sodium carbonate
d)
calcium oxide
15.
Which of the following IS a chemical change
a)
using chalk
b)
water freezing
c)
slicing cheese
d)
digestion
16.
An gel ice pack getting cold after you put it in the freezer for an hour.
a)
Chemical Change
b)
Physical Change
17.
An acid reacts with metal to produce
a)
Carbon dioxide
b)
Hydrogen gas
c)
Hydrogen gas and water
d)
Salt and hydrogen gas
18.
An acid reacts with metal to produce
a)
Carbon dioxide
b)
Hydrogen gas
c)
Hydrogen gas and water
d)
Salt and hydrogen gas
19.
A neutralisation reaction is a reaction between
a)
Acid and a Base
b)
Acid and water
c)
Base and water
d)
None of the above
20.
Pure water is _______ on the pH scale.
a)
Acid
b)
Base
c)
Neutral
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