Which of the following is true for calcination of a metal ore?
CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals
Problem
Which of the following is true for calcination of a metal ore?
(1) It makes the ore more porous
(2) The ore is heated to a temperature when fusion just begins
(3) Hydrated salts lose their water of crystallisation
(4) Impurities of S, As and Sb are removed in the form of their volatile oxides