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Question

One day you and your friends were discussing about matter. He believes that matter is continuous like a block. Initially, you have also agreed with him but later one observation changed your perception about matter. Now you believe it is made up of discrete particles. The observation was


A

Evaporation of water

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B

Complete dissolution of salt in water

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C

Freezing of water

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D

Salt settles at the bottom of the glass.

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Solution

The correct option is B

Complete dissolution of salt in water


When salt is added to water, it gets completely dissolved in it. So, if matter was like a continuous block, then there must be no space for salt to get dissolved. Therefore we can conclude that matter is composed of many small particles.


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