Chemistry Practice Worksheet
Cambridge IGCSE 0620 & O-Level 5070 · balanced from past papers
Section A · Multiple Choice40 marks
[1]
Which change of state happens when a gas becomes a liquid?
AcondensationCmeltingBevaporationDsublimation
✓ Answer · A
[1]
An atom has 11 protons, 12 neutrons and 11 electrons. What is its nucleon number?
A11C23B12D34
✓ Answer · C
[6]
Describe how to test for the gas produced when magnesium reacts with dilute hydrochloric acid.
Mark scheme attached