Question

What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.

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(i) Positive catalyst: When a catalyst increases the rate of chemical reaction, it is called a positive catalyst.
when potassium chlorate heated to decomposes to evolve oxygen gas. when : is added the decomposition takes place at .

(ii) Negative catalyst: When a catalyst decreases the rate of chemical reaction it is called a negative catalyst.Example. Phosphoric acid acts as a negative catalyst to decrease the rate of the decomposition of hydrogen peroxide. Alcohol too acts as a negative catalyst In certain chemical reactions.

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