A) (I) is a chemical change
B) (II) is a physical change
C) Both are chemical changes
D) (I) is a physical change and (K) is a chemical change
Correct Answer: D
Solution :
When iron and sulphur are mixed no new substance is formed hence it is a physical change. But on heating this mixture iron sulphide is formed. Hence it is a chemical change.You need to login to perform this action.
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