Question

Statement - I: 1 M solution of NaCl has a higher osmotic pressure than 1 M solution of glucose at the same temperature.
Statement - II: The number of particles present in 1 M NaCl solution are more than those present in 1 M glucose solution and osmotic pressure depends upon number of particles present in the solution.

• A. Statement - I is True, Statement - II is True; Statement - II is a correct explanation for Statement - I
• B. Statement - I is True, Statement - II is True; Statement - II is NOT a correct explanation for Statement - I
• C. Statement - I is True, Statement - II is False
• D. Statement - I is False, Statement - II is True

Answer 1

Answer: (A)

Statement - I is True, Statement - II is True; Statement - II is a correct explanation for Statement - I

$\pi -=MRT$
if M is same
$\pi \alpha \frac{1}{M\cdot wt}$
$NaCl$ 40
glucose 180
${\pi }_{NaCl}>{\pi }_{glucose}$ statement 1 is true
$\to n\alpha \frac{1}{M\cdot wt};n_{NaCl}>n_{glucose}$
So statement - II also true also it is correct explanation for statement - I