Question 1
Which of the following represents a physical property?
◦ Aluminum has a tendency to "rust."
◦ Mercury is a silvery liquid at room temperature.
◦ Argon has an unreactive nature.
◦ Sodium metal is extremely reactive with chlorine gas.
◦ Butane is highly flammable.
Question 2
Which of the following represents a chemical property of hydrogen gas?
◦ It is less dense than air.
◦ It is tasteless.
◦ It is gaseous at room temperature.
◦ It reacts explosively with oxygen.
◦ It is colourless.