The table shows some properties of four metals, A, B, C and D.
| Metal | Melting point (°C) | Density (g/cm³) | Colour of its compounds |
|---|---|---|---|
| A | 1538 | 7.87 | green or orange-brown |
| B | 98 | 0.97 | white |
| C | 1085 | 8.96 | blue or green |
| D | 63 | 0.86 | white |
Two of the metals are transition metals.
Write the letters of the two transition metals.
Give two pieces of evidence from the table that support your answer to (a).
Metal A is iron.
Iron forms two different chlorides, iron(II) chloride, FeCl₂, and iron(III) chloride, FeCl₃.
What does this show about transition metals?
Transition metals and their compounds are often used as catalysts.
What is a catalyst?
Give one example of a transition metal that is used as a catalyst.
Name the industrial process it is used in.
Metal B is a Group 1 metal.
Give one difference between the way metal B reacts with cold water and the way iron reacts with cold water.
60 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.