Original questions for every topic, Core and Extended, with worked explanations.
Multiple choice
Paper 1 and Paper 2 style, worked or timed
Theory
Paper 3 and Paper 4 style
Practical
Paper 6 style
Written answers
Read against the mark points, with your next step
Try 4 questions
Question 1
Time for the cross to disappear at four temperatures.
Temperature / °C
Time / s
20
120
30
60
40
30
50
?
Dilute hydrochloric acid is added to sodium thiosulfate solution in a flask standing on a cross. A precipitate of sulfur forms and the time for the cross to disappear is measured at different temperatures. The table shows the results. Predict the time at 50 °C.
Question 2
Which salt is insoluble in water?
Question 3
Whether each metal displaces the metal in the solution (✓) or not (✗).
Metal
Solution of a salt of P
Solution of a salt of Q
Solution of a salt of R
P
not tested
✓
✓
Q
✗
not tested
✓
R
✗
✗
not tested
A student puts pieces of three metals, P, Q and R, into solutions of each other's salts. The table shows whether the metal displaces the other metal from the solution. What is the order of reactivity, most reactive first?
Question 4
A hydrocarbon is shaken with aqueous bromine. Which result shows that the hydrocarbon is unsaturated?