A. Active carbon
B. Silica gel
C. Bog iron (iron oxide)
D. Pulverised limestone
Correct Answer: Silica gel ✔
Last Updated: March 11, 2019
A. Active carbon
B. Silica gel
C. Bog iron (iron oxide)
D. Pulverised limestone
Correct Answer: Silica gel ✔
Last Updated: March 11, 2019