Which statement is a key characteristic of a chemical system at dynamic equilibrium?
The concentrations of reactants and products are equal.
The forward and reverse reactions have completely stopped.
The concentrations of reactants and products remain constant over time.
The rate of the forward reaction is much slower than the rate of the reverse reaction.
Practise OCR GCSE Chemistry Equilibria with exam-style questions for Foundation and Higher tier. 35 questions, matched to the OCR GCSE Chemistry (J248) specification and written in Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.