Calcium hydroxide solution is used to detect the presence of carbon dioxide gas, while sodium hydroxide is NOT. Justify.

During the extraction of aluminium bauxite, its principal ore is reduced by the electrolytic method. Why?

Why is pure acetic acid also called glacial acetic acid?

A fuse wire is an alloy made of tin and lead. It is a safety device that prevents the damage of electronic gadgets due to excessive flow of current. Can copper replace tin when making alloys? Justify your answer.