Question
Classify the following as a chemical or physical change.
(i) Cutting of trees; (ii) Melting of butter in a pan; (iii) An almirah gets rusted; (iv) Water boils to form steam; (v) Electric current is passed through water and it is broken down into hydrogen and oxygen gas; (vi) Dissolving salt in water.
Solution
(i) Cutting of trees–Physical Change
(ii) Melting of butter in a pan–Physical change
(iii) An almirah gets rusted–Chemical change
(iv) Water boils to form steam–Physical change
(v) Electric current is passed through water and it is broken down into hydrogen and oxygen–Chemical change
(vi) Dissolving salt in water–Physical change
