Solutions Question 305
Question: Which will form maximum boiling point azeotrope-
Options:
A) $ HNO_3+H_2O $ solution
B) $ C_2H_5OH+H_2O $ solution
C) $ C_6H_6+C_6H_5CH_3 $ 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 $ HNO_3 $ and $ H_2O $ will form maximum boiling point azeotrope. Maximum boiling azeotropes show negative deviation from Raoult’s law.
| Composition (%) | Boiling Point |
|---|---|
| $ HNO_3 $ | 68.0 359 K |
| $ H_2O $ | 32.0 373 K |
Boiling point of the azeotrope of these two solutions is 393.5 K.
