WBJEE · Chemistry · Solutions
A solution containing \(4 \mathrm{~g}\) of polymer in 4.0 litre solution at \(27^{\circ} \mathrm{C}\) shows an osmotic pressure of \(3.0 \times 10^{-4} \mathrm{~atm}\). The molar mass of the polymer in \(\mathrm{g} / \mathrm{mol}\) is
- A 820000
- B 82000
- C 8200
- D 820
Answer & Solution
Correct Answer
(B) 82000
Step-by-step Solution
Detailed explanation
Hint : \(\pi=i C(M) R T\) \(3.0 \times 10^{-4}=1 \times C(M) \times 0.0821 \times 300\) \(\therefore \mathrm{C}(\mathrm{M})=1.22 \times 10^{-5} \text {, Molarity }=\frac{\text { no. of moles }}{\text { vol. of solution }(\mathrm{L})}\)…
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