WorksheetsChemical Reactions
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Chemical properties of a substance include all of the following except..
a)
its boiling point
b)
its toxicity
c)
its flammability
d)
its reactivity
2.
The toxicity of a substance refers to ..
a)
its ability to burn ie catch on fire
b)
its ability to react quickly with other substances
c)
how its affects your health
d)
its ability to explode
3.
A metal like copper is said to be ductile. This means it can be ...
a)
corroded easily
b)
bent into wires
c)
heat up and conduct heat
d)
bent into sheets
4.
Which of the following is a chemical change rather than a physical change
a)
boiling water at 100 C
b)
chopping up a piece of wood.
c)
cooking a cake
d)
ice carbon dioxide sublimating to gas
5.
Some hydrochloric acid is added to marble chips in a test tube. The students observed bubbles and fizzing. The gas is ....
a)
Oxygen gas
b)
Carbon dioxide
c)
Hydrogen gas
d)
nitrogen gas
6.
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
7.
In the above reaction, to test for the gas I could ...
a)
Bubble it through limewater and it will go milky
b)
do the pop test and it will burn
c)
Light a taper and it will burn brighter
d)
note the colour change to yellow
8.
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
9.
The process going from a gas to a liquid is called ...
a)
evaporation
b)
melting
c)
condensation
d)
sublimation
10.
The only way you can be certain that a chemical reaction has occured is by?
a)
Light has been emitted
b)
a colour change has occurred
c)
bubbles appear
d)
identifying one or more new chemical products
11.
When some lead nitrate solution was added to Potassium Iodide in a test tube, the reaction produced a...
a)
Yellow solid precipitate
b)
fizzing colourless gas
c)
increase in temperature in the test tube
d)
while cloudy precipitate
12.
A Precipitate forms
a)
when a gas is bubble through a liquid
b)
a lighter taper causes a gas to burn
c)
in a liquid or gas after a reaction and causes cloudiness (caused by a solid forming)
13.
I heat some copper carbonate in a test tube.
It goes black. This is due to the Copper carbonate reacting to form ...
It goes black. This is due to the Copper carbonate reacting to form ...
a)
Copper Oxide
b)
carbon dioxide
c)
lead oxide
d)
Copper
14.
Finish of the following word equation
Copper carbonate + hydrochloric acid = Carbon Dioxide + copper chloride + ______.
Copper carbonate + hydrochloric acid = Carbon Dioxide + copper chloride + ______.
a)
water
b)
Hydrogen gas
c)
copper
d)
oxygen
15.
The number of atoms of oxygen in
Cu(NO3)2 is ...
Cu(NO3)2 is ...
a)
2
b)
5
c)
6
d)
zero
16.
The correct chemical formula for calcium carbonate is ....
a)
CaCO3
b)
Ca2CO3
c)
Na2CO3
d)
CO2
17.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
18.
An gel ice pack getting cold after you put it in the freezer for an hour.
a)
Chemical Change
b)
Physical Change
19.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
20.
Which of the following IS a chemical change
a)
using chalk
b)
water freezing
c)
slicing cheese
d)
digestion
100 %
