(a)[3]
State three further physical properties of chromium.
(b(i))[2]
State the chemical name given to rust.
(b(ii))[2]
An iron object has a plastic coating. Explain how this stops the iron rusting.
(c)[2]
Complete the word equation for this reaction: chromium + sulfuric acid → [BLANK] + [BLANK].
(d)[2]
The list contains five metals: aluminium, calcium, copper, iron, zinc. Arrange these metals by reactivity, with the most reactive metal at the top.
(e)[1]
Zinc may be made by heating zinc oxide with carbon: $\text{ZnO} + \text{C} \rightarrow \text{Zn} + \text{CO}$. Describe how this equation shows that zinc oxide is reduced.