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प्रश्न
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Name the catalyst used in the preparation and state it’s function.
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उत्तर
Catalyst used in preparation of oxygen is manganese dioxide. It increased the speed of decomposition of H202.
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संबंधित प्रश्न
Define the term acid rain.
A mixture of oxygen and carbon dioxide used for artificial respiration.
State two differences between:
Rusting and burning.
What happens when potassium nitrate is heated ?
What is rusting?
Oxygen of the air is utilised for ‘combustiop’ and for ‘respiration’. Compare the two with a suitable examples.
Describe simple experiments to show the presence of -
water vapour in air using a glass tumbler and ice.
Identify the acidic oxides responsible for acid rain. State how their presence results in formation of acid rain. Give a reason why acid rain damages heritage buildings.
Distinguish between:
Combustion & Rusting with suitable word equations only?
Name the following:
The gas required for both combustion and rusting.
