WorksheetsReactivity, energy and reactions
Total questions: 11
Worksheet time: 6mins
A substance that provides oxygen to oxidise another substance.
oxidation
oxidising agent
exothermic agent
endothermic agent
A change or reaction that absorbs energy from the surroundings, making the temperature of the surroundings fall.
endothermic reaction
exothermic reaction
energy transfer
Heating
A change or reaction that transfers energy into the surroundings, making the temperature in the surroundings rise.
endothermic reaction
exothermic reaction
oxidation
heat
Which of the following is a chemical change?
condensation
evaporation
combustion
melting
Which of the following examples is a physical change?
Frying an egg
Heating a candle until it becomes liquid
combustion
Iron rusting
Why does pressure in a gas increase when you reduce the size of the container?
There are less particles
The particles are moving faster
The particles have more energy
There are more collisions between the particles and the surface
The reactivity series is a list of _________ in order of reactivity, with the most reactive at the _______.
non-metals; bottom
metals; top
non-metals; top
metals; bottom
Complete the equation: metal + water → ________________
metal + water → metal oxide
metal + water → salt + hydrogen
metal + water → metal hydroxide + oxygen
metal + water → metal hydroxide + hydrogen
What is the name of the substance which releases oxygen and is often used in explosives?
hydrogen
reducing agent
potassium nitrate
oxygen
Which of these metal is most reactive?
Lithium
Aluminium
Lead
Copper
X
Y
Z
X
Z
Y
Z
X
Y
Y
Z
X
