Sulphide ores are converted into oxides by heating them strongly in excess of air. This process is known as

Q.

The sulphide ores are converted into oxides by heating them strongly in the presence of excess air. This process is called

Q. The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as:
(correct answer +1, wrong answer -0.25)

Q. The process in which carbonate ores are changed into oxides by heating strongly in limited air is known as ________.

Q. Read the following statements carefully.

(I) Sulphide ores are converted into oxides by heating strongly in the absence of air or oxygen.

(II) Impurities such as soil, sand etc, present in ores are called gangue.

Now, choose the correct option.