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Chemistry CBSE Live product
Class 10
Metals and non-metals
Annual Revision II - Metals and non-metals
4.
Corrosion and its prevention
Question:
1
m.
Read the following assertion and reason and choose the correct option:
Assertion (A)
When copper exposed to moist air, it loses its shiny brown and develops a green coating.
Reason (R)
This is caused by copper reacting with sulphur in the air.
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
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