Dilute sulphuric acid was added to compound 'P' of magnesium. The solid reacted with acid to form a colourless solution Q and a colourless gas R which formed a white
precipitate when bubbled through lime water.
a)
Name:
i) compound P
(lmk)
ii) solution Q
..(Imk)
colourless gas R
.(lmk)
b) Write a word equation for the reaction that took place
(Imk)
c)
Comment on the observation that would be made if a similar compound of
calcium was used in place of that of magnesium
(3mks)​