This question is about elements in Groups 1 and 7 of the Periodic Table.
The diagram shows two ways in which potassium can be converted into potassium iodide.
Give the names of gas A, colourless solution B, and acid C.
When sodium is burned in bromine vapour, sodium bromide is formed.
Write a chemical equation for the reaction between sodium and bromine.
Give a test to show that an aqueous solution of sodium bromide contains bromide ions, and state the observation.
