Catalyst

1.	Catalyst
Answer» (i) The substance in whose presence the rate of a chemical reaction changes, without causing any chemical change to it is called a catalyst. (ii) e.g. Potassium chlorate `(KClO_(3))` decomposes rapidly in presence of manganese dioxide `(MnO_(2))` to liberate `O_(2)` gas, where manganese dioxide acts as a catalyst. (iii) `2KClO_(3)overset(Delta)underset(MnO_(2))to2KCl +3O_(2)`

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