(a) Most of the metals acquire a dull surface when exposed to air . Name the chemical phenomenon responsible for this process. (b) State the conditions under which the iron articles get rusted . Design an activity to investigate the conditions necessary for rusting .

(a) Most of the metals acquire a dull surface when exposed to air . Na

1.	(a) Most of the metals acquire a dull surface when exposed to air . Name the chemical phenomenon responsible for this process. (b) State the conditions under which the iron articles get rusted . Design an activity to investigate the conditions necessary for rusting .
Answer» SOLUTION :Silver chloride (AGCL) and Silver BROMIDE (AgBr) `2AgCl overset ("Sunlight")rarr2Ag+Cl_(2)` `2AgBr overset("Sunlight")rarr2Ag+Br` Those reactions in which energy is absorbed (in from of heat, light or ELECTRICITY ) to break down the rectants is cal