question_answer 22)

Name the two metals which will displace hydrogen from dilute acids and two metals which will not.                                                                         

Answer:

Metals such as Mg, Al, Zn, Fe, etc. which lie above hydrogen in the activity series are more reactive than hydrogen and hence can displace hydrogen from dilute acids: For example

	Sulphuric acid	Zinc (II) sulphate	Hydrogen
	Hydrochloric acid	Iron (II) chloride	Hydrogen

  Metals such as  etc. which lie below hydrogen in the activity series are less reactive than hydrogen and hence cannot displace hydrogen from dilute acids.