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प्रश्न
A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be taken into small particles by hammering. Which characteristic of the particles of matter is illustrated by these observations?
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उत्तर
Matter is made up of small particles which attract each other. This force of attraction differs from substance to substance. Chalk breaks easily on hammering while iron does not. This shows that particles of iron attract each other with a greater force than the particles of chalk.
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