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NEET levelSingle correct optionDifficulty 1 of 3pn056

When potassium chlorate is heated to obtain dioxygen in the laboratory, a little $MnO X_{2}$ is added. Its role is to

Aabsorb chlorine formed as a by-product
Boxidise $KClO X_{3}$ to $KClO X_{4}$
Cact as a catalyst and lower the temperature needed for decomposition
Dreact with $KCl$ to form $MnCl X_{2}$

Answer: C

2 KClO X_{3} MnO X_{2}, Δ 2 KCl + 3 O X_{2}

. Manganese dioxide is not consumed; it only catalyses the decomposition so that it occurs at a lower temperature.

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