Pick out the wrong statement?

A. Silica occurs in nature in all cellular, amorphous or crystalline form

B. Sand & coke is the main raw material for the manufacture of silicon carbide

C. Carbon refractories cannot be used in the furnaces operating under reducing conditions

D. Mullite can be obtained by the heating of alusite, kyanite or sillimanite

Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.

Discuss the answer or suggest a sourced correction
Thank you for contributing.
Your comment was submitted and will appear after editorial review.

Your email is used only for moderation and is never displayed. Spam, copied material and fabricated endorsements are rejected.