Solutions Question 305

Question: Which will form maximum boiling point azeotrope-

Options:

A) HNO3+H2O solution

B) C2H5OH+H2O solution

C) C6H6+C6H5CH3 solution

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

The solutions (liquid mixture) which boils at constant temperature and can distil as such without any change in composition are called azeotropes. Solution of HNO3 and H2O will form maximum boiling point azeotrope. Maximum boiling azeotropes show negative deviation from Raoult’s law.

Composition (%) Boiling Point
HNO3 68.0 359 K
H2O 32.0 373 K

Boiling point of the azeotrope of these two solutions is 393.5 K.



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