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1. To get hard boiled eggs, common salt is added to water during boiling. Give reason.

2. Which colligative property is more suitable for the determination of molecular mass of polymers? Give the expression to determine molecular mass by this method.

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1. The egg which is placed in sodium chloride solution will shrink due to osmosis of water out of the egg and thus get hardened.

2. Osmotic pressure method.

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