Question

Pickling of steel is done to

• A. remove impurities or rust.
• B. corrode the metal.
• C. give an odour to the metal.
• D. make the metal more malleable.

Answer 1

The correct option is A

remove impurities or rust.

Pickling is a surface treatment for metals which is used to remove impurities such as stains, inorganic contaminants, rust or scale from ferrous metals, copper or precious metals and aluminium alloys.