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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
Very Short Answer Type Question:
Select a lustrous material out of the following substances.
Find the odd one.
Umbrella, sponge, rain coat, jerkin
We cannot compress, cut or bend the rough materials easily.
A piece of wood floats on water.
Which among the following is an example of dull material?
Name some examples for shiny materials?
What is material?
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 |
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.
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 |
