In one industrial process, chromium(III) oxide, Cr2O3\text{Cr}_2\text{O}_3Cr2O3, is used as a catalyst.
Based on the position of chromium in the periodic table, which row in the table shows the most likely melting point of chromium and the colour of chromium oxide?
| Melting point of chromium in ∘C^\circ\text{C}∘C | Colour of chromium oxide | |
|---|---|---|
| A | 98 | white |
| B | 1907 | white |
| C | 98 | green |
| D | 1907 | green |
Melting point: 98 ∘C98\ ^\circ\text{C}98 ∘C; Colour: white
Melting point: 1907 ∘C1907\ ^\circ\text{C}1907 ∘C; Colour: white
Melting point: 98 ∘C98\ ^\circ\text{C}98 ∘C; Colour: green
Melting point: 1907 ∘C1907\ ^\circ\text{C}1907 ∘C; Colour: green
Practise Edexcel GCSE Chemistry Transition metals, alloys and corrosion with exam-style questions for Foundation and Higher tier. 97 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 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.
