0620/12 Chemistry May Jun 2017 Online Test | Cambridge IGCSE MCQ
The equation for the effect of heat on hydrated sodium carbonate is as shown.
Statements made by four students about the reaction are given.
P Anhydrous sodium carbonate is formed.
Q Steam is formed.
R There is a colour change from blue to white.
S The reaction is reversible.
Which students’ statements are correct?