Question

14. Which of the following statement is correct?
(a) Roasting is heating an ore in presence of excess
of air whereas calcination is heating an ore in the
absence of air
(b) Roasting is done for sulphide ores
(c) Calcination is done for carbonate ores
(d) All the above statements are correct​

Answer 1

Answer:

all the above sentence is correct

Answer 2

Answer:

Option : D is the right answer