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प्रश्न
When can you say a material is waterproof material?
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उत्तर
Materials that do not allow water to pass through them are called waterproof materials.
Example: raincoat, aluminium foil of tablet strip.
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संबंधित प्रश्न
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| COLUMN I | COLUMN II | ||
| (a) | Surgical instruments | (i) | Plastic |
| (b) | Newspaper | (ii) | Animal product |
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| (d) | Wool | (iv) | Plant product |
