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प्रश्न
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.
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उत्तर
Sugar - Soluble in water
Salt - Soluble in water
Mustard oil - Insoluble in water
Sand - Insoluble in water
Sawdust - Insoluble in water
Honey - Soluble in water
Chalk powder - Insoluble in water
Petals of flower - Insoluble in water
Soil - Insoluble in water
Copper sulphate crystals - Soluble in water
Glucose - Soluble in water
Wheat flour - Insoluble in water
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संबंधित प्रश्न
Materials which can be bent or stretched easily are called ______.
Look at the pictures and identify the materials by which they are made of:
(paper, clay, glass, wood, plastic, metal rubber, wax
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| ____________ | ____________ | ____________ | ___________ | _____________ |
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| ____________ | ____________ | ____________ | ____________ | ____________ |
Sand paper is a good example for smooth materials.
Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt
Chalk dissolves in water.
Vinegar dissolves in water.
Materials which have ups and downs on their surface are called ______.
Rubber band is an example of ______.
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?
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?
