which of the following would be chemical change ( a) a metal on heating to a high temperature turns into liquid form (b) a metal gets a greenish coating on exposure to air (c) a metal is drawn into wires (d) a metal is beaten into thin sheets
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Answered by
2
Answer:
(b) a metal gets a greenish coating on exposure to air
Explanation:
as there is change in colour, state,and also in chemical chage is occurring hence it Is chemical change occurring
Answered by
1
Answer:
option b) a metal gets a greenish coating on exposure to air.
Explanation:
Because example like colour changes of iron like rusting of iron(turns to brownish in colour) and in this metal has a greenish coating that means it has a rusting too. And it's Irreversible change we cannot change back to it's normal form. So it is a chemical change anything like burning of paper breaking of glass or rusting of iron it's all chemical change.
Note: Chemical changes are always Irreversible.
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