Introduction to Chemistry

What are the three states of matter?

• Density, volume and weight

• Solid, liquid, and gas

• Water, metal and gases

• Air, cells and mass

A liquid has:

• A definite shape and volume. 

• A definite volume, but not a definite shape

• A definite shape, but not a definite volume

• A variable shape and volume

Which of the following is a list of compounds?

• Water, carbon dioxide, benzene

• Gold, silver, brass

• Brick, sand, concrete

• Hydrogen, nitrogen, oxygen

The process at which a substance changes from a solid to a liquid.

• Boiling

• Freezing

• Melting

• Evaporation

What do the chemical symbols in the Periodic Table represent?

• Compounds

• Elements

• Metals only

• Non-metals only

Which statement about the molecules in ice is correct?

• The molecules all move with the same speed

• The molecules are diatomic

• The molecules move randomly

• The molecules vibrate about fixed positions

The pH values of four aqueous solutions are shown. Which solution contains a weak acid?

• pH 2

• pH 5

• pH 7

• pH 9

The pH values of four aqueous solutions are shown. Which solution contains a weak acid?

• pH 2

• pH 5

• pH 7

• pH 9

A man suffering from an excess of acid in his stomach has no indigestion tablets. Which substance could he take to neutralise this acidity?

• aspirin (pH 6 in solution)

• bicarbonate of soda (pH 8 in solution)

• lemon juice (pH 5)

• salt water (pH 7)

How do you test for hydrogen gas?

• Makes a squeaky pop with a burning/lighted splint

• Relights a glowing splint

• Turns limewater milky

• Bleaches damp litmus paper