Which of the steels, L, M or N, would be most suitable for reinforcing concrete? Give two reasons for your choice.
Which diagram, P, Q, R or S, shows an alloy?
State three properties of transition elements that are not shown by Group I elements.
Complete the chemical equation shown for this reaction. $\text{Fe} + \ldots\text{HCl} \rightarrow \text{FeCl}_2 + \ldots$
Arrange these metals by reactivity, with the least reactive metal first.
What effect does the concentration of acid have on the reaction rate?
Which acid reacts with the iron at the fastest rate?
Predict the time required for the iron mass to fall by 1.0 g when propanoic acid has concentration $0.03\,\text{mol dm}^{-3}$.
Suggest which of these pH values matches the pH of concentrated aqueous phosphoric acid. pH 2, pH 7, pH 9, pH 13