A. Extraction of iron in the blast furnance
B. Manufacture of tetraoxosulphate (VI) acid by Contact process
C. Production of washing soda by Solvay process
D. Production of cement

Correct Answer: Option B

B. Manufacture of tetraoxosulphate (VI) acid by Contact process

Copyright warnings! Do not copy.

Earn Your Degree In 3 Years Without Writing UTME. Click Here To Learn More.