A technician has four metals, P, G, D and C. The technician adds pieces of some of the metals to solutions of the sulfates of the other metals. A solid coating forms on the metal when a displacement reaction occurs.
| Metal added | Solution | Solid coating forms? |
|---|---|---|
| D | sulfate of C | yes |
| G | sulfate of D | yes |
| G | sulfate of P | no |
Which pair of further tests would both produce a solid coating?
Metal P in a solution of the sulfate of D, and metal G in a solution of the sulfate of C
Metal P in a solution of the sulfate of D, and metal C in a solution of the sulfate of G
Metal D in a solution of the sulfate of P, and metal C in a solution of the sulfate of G
Metal D in a solution of the sulfate of P, and metal G in a solution of the sulfate of C
113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.