Q6 of 65 Page 3

Why does solid ice float on water?

Solid ice floats on water because it has a lesser density than water. This means solid ice is lighter than water. The heavier water removes the lighter ice, hence ice floats to the top.


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Find the density of a handful of sand having a mass of 208 g and it displaces a volume of 80 mL of water.

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By which physical process the fragrance of burning an incense stick spreads all around?

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(i) Higher the melting point of a substance, …… will be the force of attraction between its particles.

(ii) Particles from the bulk of the liquid gain energy to change into ……… state.


(iii) Naphthalene undergoes the process of ……….