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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
पर्याय
hydrated iron oxide
hydrated copper sulphate
anhydrous iron oxide
none of the above
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उत्तर
hydrated iron oxide
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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.
What do you observe when a burning candle is covered with an inverted jar.
Give two uses of the following component present in air:
oxygen
Give two uses of the following component present in air:
water vapour
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Describe a simple experiment with the help of a diagram to show that Air has mass
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
Air has no ______ & ______.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
