(a)[1]
What action should the student take to start the reaction?
(b(i))[1]
Explain why the gas volume remains unchanged after 10 minutes.
(b(ii))[1]
How much time was needed to collect the first $20\,\text{cm}^3$ of gas?
(b(iii))[2]
Draw the line shape on the grid on page 16 for the reaction carried out at $30\,^{\circ}\text{C}$.
(c)[2]
Describe and explain how the rate of reaction changes when zinc powder is used.
(d(i))[1]
What is meant by the term compound?
(d(ii))[1]
Give one example of a source of sulfur.
(d(iii))[1]
Give one use for sulfur dioxide.