WorksheetsCHEMICAL REACTIONS
Total questions: 25
Worksheet time: 13mins
A substance that is formed as the result of a chemical reaction is a __________________
Product
Reactant
Starters
Enders
Which of the following is an example of a chemical change?
water freezes to form ice
sugar dissolves in water
gasoline burns in a car engine
a piece of metal expands when it is heated
A change in the shape of an object is an example of _________________.
a chemical change
energy
an endothermic change
a physical change
Allows heat or electricity to go through
insulator
conductor
luster
ductile
Able to be beaten or hammered into shapes
luster
malleable
brittle
insulator
The shine on metal when light falls on it.
luster
brittle
malleable
tarnish
What does the word "thermal" mean?
metal
heat
electric
shiny
Why are cords for toasters, televisions, and phone chargers made of metal wires?
metals are shiny
metals are good conductors of heat
metals are good conductors of electricity
metals are magnetic
At room temperature, a non-metal, such as oxygen (O), can be invisible.
True
False
Fireworks exploding in the sky undergo a physical change.
TRUE
FALSE
Which of the following is an example of a chemical change?
water freezes to form ice
sugar dissolves in water
gasoline burns in a car engine
a piece of metal expands when it is heated
When a metal is shiny, we say it is ___________.
lustrous
malleable
ductile
conductive
When a metal can be pounded into thin sheets, we say it is ___________.
lustrous
malleable
ductile
conductive
This picture represents which of the following?
element
compound
A substance that is formed as the result of a chemical reaction is a __________________
Product
Reactant
Starters
Enders
Test for carbon dioxide (CO2)
turns damp, red litmus paper blue
turns limewater milky
turns acidified aqueous potassium manganate(VII) from purple to colourless
damp blue litmus paper turns red, then bleach to white
relights a glowing splint
Test for hydrogen (H2)
turns damp, red litmus paper blue
turns limewater milky
'pops' with a lighted splint
damp blue litmus paper turns red, then bleach to white
relights a glowing splint
