Question

Classify following as a physical or a chemical change. [5]

(a) Hydrochloric acid react with sodium hydroxide to produce a salt.

(b) A pellet of sodium is sliced in to two.

(c) Water is heated and change to steam.

(d) Potassium chlorate decomposes to potassium chloride and oxygen gas.

(e) Iron rusts.

(f) Ice melts.

(g) Acid on limestone produces carbon dioxide gas.

(h) Milk sours.

(i) Wood rots.

(j) Curdling of milk.

Answer 1

Answer:

chemical

physical

physical

Chemical

chemical

physical

Chemical

chemical

physical

chemical..

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