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प्रश्न
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 |
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उत्तर
| COLUMN I | COLUMN II | ||
| (a) | Surgical instruments | (iii) | Steel |
| (b) | Newspaper | (iv) | Plant product |
| (c) | Electrical switches | (i) | Plastic |
| (d) | Wool | (ii) | Animal product |
Explanation:
(a) Surgical instruments - Steel (rust free)
(b) Newspaper - Plant product (paper)
(c) Electrical switches - Plastic (insulator)
(d) Wool - Animal product (sheep)
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संबंधित प्रश्न
Short Answer Type Question:
What is the basis for sorting materials?
Find the odd one.
Umbrella, sponge, rain coat, jerkin
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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| ____________ | ____________ | ____________ | ____________ | ____________ |
Write whether the given materials are hard or soft.
| Wood | Eraser | Cotton |
| ______ | ______ | ______ |
Test the flexibility.
Give one plastic scale and a wooden scale to the students. Ask them to bend. Tabulate their observation (bends, does not bend).
| Plastic Scale | Wooden Scale |
| ______ | ______ |
Name five objects which can be made from wood.
A piece of wood floats on water.
Choose the odd one:
Soft material ______.
Fill in the blanks to complete the following paragraph.
The name of the product formed in the reaction of sulphur and ______ is sulphur dioxide gas. When sulphur dioxide is dissolved in ______, sulphurous acid is formed. The sulphurous acid turns ______ litmus paper to ______. Generally oxides of ______ are acidic in nature.
After completing the paragraph, write two questions which you can raise on the basis of this information.
