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प्रश्न
Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.
उत्तर
- Chalk – Hard, rough, non-lustrous
- Wood – Hard, rough, non-lustrous
- Aluminium – Hard, smooth, lustrous
- Candle – Hard, smooth, non-lustrous
- Cotton – Soft, smooth, non-lustrous
- Iron nail – Hard, smooth, lustrous
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