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Why is catalyst added while preparing oxygen from decomposition of \( K C l O_{3} ? \)

1. to increase the rate of reaction
2. \( K C l O_{3} \) decomposes at lower temperature
3. catalyst undergoes no change chemically or in mass
4. all of the above

Correct answer: to increase the rate of reaction

Solution

In the decomposition of potassium chlorate, a catalyst is added to speed up the reaction. It helps the oxygen be produced more quickly, but it is not the reason the substance changes chemically or the main point of the process.

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