Give reasons : Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Which metals do not corrode easily ?
Why do ionic compounds have high melting points ?
What chemical process is used for obtaining a metal from its oxide ?
Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute $H_2SO_4$.