By which method is aluminum metal obtained by the reduction of alumina?

Which one of the following figures correctly describes the process of electrolytic refining?

State whether the following statement is true or false:
Copper reacts vigorously with dilute $HCl$.

What are the constituent elements of Magnalium?

Which alloy is used for making statues and medals?

Name the metal which:
$(a)$ becomes blackish after a certain time.
$(b)$ develops a green coating on exposure to air.
$(c)$ does not corrode at all.
$(d)$ is used in making steel.
$(e)$ is non-lustrous.