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Smelting

18. Why does ...

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18. Why does the melting and boiling point of water is affect by addition of impurities.

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The boiling point of liquid increases by addition of impurities to it.

The boiling point of a liquid decreases by the addition of impurities to it.

Q. The boiling point of liquid increases by addition of impurities to it. True or False?

Q. When water is heated at its boiling point or melting point, its temperature does not change.
a) What is meant by boiling point and melting point?
b) What are the boiling and freezing points of water?
c) Why is there no change in temperature?

Q. Which of the following statement(s) is/are correct?
(a) Non-volatile impurities decrease the boiling point of the substance.
(b) Addition of impurities to a solid decrease the melting point of solid.
(c) Lower the boiling point of a liquid, higher is its rate of evaporation.

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