Question

Assertion $(A)$ Osmotic pressure $0.1\,N$ urea solution is less than that of $0.1\,M$ $NaCl$ solution
Reason $(R)$ Osmotic pressure is not a colligative property.

• A. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
• B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
• C. If Assertion is true but Reason is false.
• D. If both Assertion and Reason are false.

Answer 1

Answer: (C)

$NaCl $ is an electrolyte which on dissociation give two ions. Whereas urea is not an electrolyte. Hence, osmotic pressure of $0.1\,M \,NaCl$ is almost double than that of $0.1\,M$ urea solution.