A student heats some ammonium chloride at the bottom of a test tube. The ammonium chloride breaks down into ammonia and hydrogen chloride. The gases rise to the cool glass near the top of the tube.
Which observation does the student make near the top of the tube?
No change is seen because both gases are colourless
A white solid appears on the glass
A blue solid appears on the glass
Colourless liquid droplets collect on the glass
109 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.