Name the metal which is the best conductor of heat and electricity.

62 What are metals? Name five metals. 62 Name a metal which is so soft that it can be cut with a knife. 62 What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example. 62 Write the equations for the reactions of:

(i) Magnesium with dilute hydrochloric acid

(ii) Aluminium with dilute hydrochloric acid

(iii) Zinc with dilute hydrochloric acid

(iv) Iron with dilute hydrochloric acid