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प्रश्न
A mixture of oxygen and carbon dioxide used for artificial respiration.
उत्तर
Carbogen
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संबंधित प्रश्न
A metal highly resistant to rusting.
Fill in the blank by choosing the correct word from the given list.
List: oxygen, carbonic, suIphur dioxide gas, precipitation, helium
____________ gas can cause acid rain.
State and explain two ways by which air gets polluted in nature.
Tick (√ ) the most appropriate answer.
Galvanising is the process of coating iron with a layer of molten :
State two most important conditions for rusting.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Name the catalyst used in the preparation and state it’s function.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
State the word equation for the reaction involving the above preparation of oxygen.
Name the following:
The pollutant which combines with water vapour to give sulphuric acid – a product of acid rain.
Name the following:
The gas required for both combustion and rusting.
Match the following
| 1. | Burning of meteors | a. | Exosphere |
| 2. | Weather change | b. | Stratosphere |
| 3. | Lowest temperature | c. | Mesosphere |
| 4. | Ozone layer | d. | Troposphere |
