Oxygen questions | form two Chemistry

Why is it important to have abundant oxygen gas on the Earth? Give five reasons.

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UNSOLVED

By giving one reason, explain the following facts:

1. During laboratory preparation of oxygen gas, little manganese dioxide is added to hydrogen peroxide.
2. Fish can obtain oxygen for respiration although they spend their lives in water.
3. Oxygen gas can be used for welding activities although it does not burn.

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Which property enables the use of hydrogen gas in

1. filling weather balloons?
2. production of oxy-hydrogen flame?

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Give two domestic uses of oxygen gas.

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Outline six common apparatus used in Laboratory preparation of Oxygen gas using hydrogen peroxide.

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