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प्रश्न
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
उत्तर
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. |
(a) Oxygen |
| 2. A gas used for filling weather observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Write the chemical name of Lime water
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
With whom should I pair up?
| Group A | Group B | ||
| 1 | Air | a | Excretion |
| 2 | Water | b | Scattering of light |
| 3 | Soil | c | Plasticity |
State the meaning of the term Air
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
Mention two advantages of wind energy.
What is global warming?
In a number of musical instruments, air plays an important role. Can you name some such instruments?
