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Question

# An azeotropic mixture of water (B.P. 373 K) and nitric acid (B.P. 359 K) is formed. Which of the following is true for the boiling point of mixture Tmix ?

A
Tmix<359 K
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B
Tmix>373 K
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C
359 K<Tmix<373 K
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D
Cannot be predicted
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Solution

## The correct option is B Tmix>373 KThe azeotropic mixture of water and nitric acid is a maximum boiling azeotrope.The boiling point of the mixture should be more than their boiling point in pure state. Given: B.P of water is 373 K B.P of nitric acid is 359 K (b) option has a temperature value which is higher than both the temperatures. So (b) is correct.

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