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प्रश्न
Match the substances in Column A with their applications given in Column B.
|
Column A |
Column B |
| (a) oxygen | (i) for making crackers |
| (b) copper | (ii) for disinfecting water |
| (c) sulphur | (iii) all living beings inhale during breathing |
| (d) iron | (iv) for making electric wires |
| (e) chlorine | (v) for making rails |
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उत्तर
|
Column A |
Column B |
| (a) oxygen | (iii) all living beings inhale during breathing |
| (b) copper | (iv) for making electric wires |
| (c) sulphur | (i) for making crackers |
| (d) iron | (v) for making rails |
| (e) chlorine | (ii) for disinfecting water |
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संबंधित प्रश्न
Very Short Answer Type Question:
Why do we need to group materials? Give one reason.
Very Short Answer Type Question:
Name two objects which are made from opaque materials.
Find the odd one.
Umbrella, sponge, rain coat, jerkin
Materials which can be compressed or cut easily are called _______.
Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt
Vinegar dissolves in water.
What is material?
Paheli prepared a blue coloured solution of copper sulphate in beaker A and placed an iron nail in it. Boojho prepared a yellowish green solution of ferrous sulphate in beaker B and placed a copper wire in it. What changes will they observe in the two beakers after an hour?
Complete the crossword given in the figure with the help of the clues.
Across
1. Which is generally hard, ductile, malleable and sonorous.
2. A metal is called so it can be drawn into wires.
3. Metal bells are used because of this property.
Down
4. A metal generally used for making jewellery.
5. A metal which is liquid at room temperature.
6. A metal which reacts with acid as well as base to form hydrogen gas.
7. Substances used to enhance the growth of plants.
8. Property by virtue of which metals can be beaten into thin sheets.
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?
