Question

Isotonic solutions have :

• A. same boiling point
• B. same vapour pressure
• C. same melting point
• D. same osmotic pressure

Answer 1

The correct option is D same osmotic pressure

Consider two solutions $A$ and $B$,

If osmotic pressure of $A$ $=$ osmotic pressure of $B$, then $A$ and $B$ are isotonic.

If osmotic pressure of $A>$ osmotic pressure of $B$, then $A$ is hypertonic with respect to $B$ and $B$ is hypotonic with respect to $A$.