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प्रश्न
Gold and diamond are the examples of _________ materials.
उत्तर
Gold and diamond are the examples of Shiny materials.
APPEARS IN
संबंधित प्रश्न
Very Short Answer Type Question:
Suggest two bases on which we can group objects.
Differentiate hard and soft materials.
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?
Match the substances in Column A with their applications given in Column B.
|
Column A (Substance) |
Column B (Application) |
| (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 |
Pick one material from the following which is completely soluble in water.
Which of the following materials is not lustrous?
Match the objects given in Column I with the materials given in Column II.
| COLUMN I | COLUMN II | ||
| (a) | Surgical instruments |
(i) | Plastic |
| (b) | Newspaper | (ii) | Animal product |
| (c) | Electrical switches | (iii) | Steel |
| (d) | Wool | (iv) | Plant product |
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?
Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.
