When making coffee, we add coffee powder to milk. So why does coffee powder disappear imparting colour to the milk?

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Coffee has smaller particles as compared to milk particles, so they fit into the spaces between the milk particles.

The quantity of coffee is less than the quantity of milk.

The coffee particles change their state from solid to gas.

The coffee particles get eliminated.

answer is A.

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Detailed Solution

All matter is made up of small particles and there is space in between these particles.

Now, grounded coffee is usually added to the milk to make a coffee drink. As the particles of coffee dissolve in milk and then occupy the spaces between the particles of milk, thus the coffee particles disappear but as it is darker in colour, it imparts light colour to the milk on dissolving.

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