(a(i))[2]
Which alloy would be the most suitable for making a bridge? Give two reasons for your answer.
(a(ii))[1]
Which alloy is best for making the tips of high-speed drills? Give one reason for your answer.
(a(iii))[1]
Which alloy is best for making aircraft bodies? Give one reason for your answer.
(b)[6]
Use the graph to answer the questions below.
(c)[1]
From the pH values listed, decide which one is the pH of concentrated aqueous sodium hydroxide. Circle the correct answer. pH 1, pH 3, pH 7, pH 12