Calcium sulphate is found in nature in two forms: anhydrous calcium sulphate and…
CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals
Problem
Calcium sulphate is found in nature in two forms: anhydrous calcium sulphate and hydrated calcium sulphate. When calcium sulphate is mixed with concentrated HCl, a paste is formed. What colour is obtained when a pinch of this paste is brought near a flame?
(1) Golden yellow
(2) Brick red
(3) Crimson red
(4) Apple green