With the help of an activity, explain the conditions

 With the help of an activity, explain the conditions under which iron articles get rusted. 

• Answer:
  • Take three test tubes and place clean iron nails in each ofthem.
  • Label these test tubes A, B and C.
  • Pour some water in test tube A and cork it.
  • Pour boiled distilled water in test tube B, add about 1 mL ofoil and cork it. The oil will float on water and prevent the airfrom dissolving in the water.
  • Put some anhydrous calcium chloride in test tube C and corkit. Anhydrous calcium chloride will absorb the moisture, ifany, from the air.Iron nails rust in test tube A, but they do not rust in test tubes B and C.Rusting of iron takes place when exposed to both air and water.

   

  

  Iron nails rust in test tube A, but they do not rust in test tubes B and C. 

  Rusting of iron takes place when exposed to both air and water.

   

• Exam Year: 2025