Question

B. Fill in the blanks :

2. Metals get tarnished when exposed to air due to the formation of an
of their reactivity is called
layer on its surface.
​

Answer 1

Answer:

corrosion

Explanation:

metal reacts with non metals mainly oxygen to form a thin layer of metal oxide on its surface which is basic in nature. this is called corrosion and the tarnished metal is said to be corroded. this layer protects further corrosion.

thank you.

Answer 2

Answer:

It is due to more oxides, hydroxides when react to oxygen, the colour of tarnish is depends on metals