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प्रश्न
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
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उत्तर
The gas evolved as a product of combustion as well as respiration is carbondioxide.
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संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Fill in the blank
Polluted air is harmful to ____.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
Water does not have a ______ but has definite ______ and ______.
State the meaning of the term atmosphere.
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
Air has no ______ & ______.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
