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प्रश्न
The composition of air is always exactly the same.
पर्याय
True
False
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उत्तर
The composition of air is always exactly the same- False.
Correct statement
The composition of air changes slightly place to place.
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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 |
Fill in the blank:
_____________ discovered the oxygen gas.
Define the following:
Respiration
Write ‘true’ or ‘false for the following;
Air is a compound.
______ soil has pH 7.
State the meaning of the term Air
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
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 prove that oxygen is non-combustible, but supports combustion.
Make sentences using the given set of words.
Air, wind, motion, called
