During laboratory preparation of oxygen by hydrogen peroxide and potassium chlorate, the gas is collected by _____ displacement of water.

downward, upward

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upward

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downward

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upward, downward

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Solution

The correct option is D downward
During laboratory preparation of oxygen by hydrogen peroxide and potassium chlorate, the gas is collected by downward displacement of water.

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The observation done in preparation of oxygen by potassium chlorate was:

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