A. Sulphur & its compounds
B. Water
C. Organic impurities
D. Wax
Correct Answer: Sulphur & its compounds ✔
Last Updated: March 02, 2019
A. Sulphur & its compounds
B. Water
C. Organic impurities
D. Wax
Correct Answer: Sulphur & its compounds ✔
Last Updated: March 02, 2019