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Dilute HNO3 cannot be concentrated beyon...

Dilute `HNO_3` cannot be concentrated beyond 68% by boiling because

A

On boiling `HNO_3` is decomposed

B

On boiling `HNO_3` produces a large amount of heat which is uncontrollable

C

It forms a constant boiling mixture with `H_2 O` boiling at 394 K

D

It can be concentrated beyond 68% by steam distillation

Text Solution

Verified by Experts

The correct Answer is:
C
Distillation only increases the concentration to 68% since a constant boiling mixture is formed. Further concentration to 98% can be achieved by dehydration with con. `H_2 SO_4`
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