Question
Question: A substance which reacts with gangue to form fusible material is called....
A substance which reacts with gangue to form fusible material is called.
A
Flux
B
Catalyst
C
Ore
D
Slag
Answer
Flux
Explanation
Solution
(Impurity) 
A substance which reacts with gangue to form fusible material is called.
Flux
Catalyst
Ore
Slag
Flux
(Impurity) 