C Match the statements in Column A, with those in Column B.
1. An equation in which the numbers of atoms of each element on the side of (a) Hydrogen sulphide
reactants and the products are not equal.
2. The substances which undergo a chemical change during a chemical reaction. (b) Products
3. The substances which are produced during a chemical reaction.
4. A foul smelling gas formed when copper sulphide is treated with hydrochloric (d) Exothermic reaction
5. A chemical reaction proceeds with release of heat energy.
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1. e 2. c 3. b 4. a 5. d
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