Solutions Question 294
Question: The solution containing $ 4.0gm $ of a polyvinyl chloride polymer in 1 litre of dioxane was found to have an osmotic pressure $ 6.0\times {10^{-4}} $ atmosphere at $ 300K $ , the value of R used is 0.082 litre atmosphere $ mol{e^{-1}}{k^{-1}} $ . The molecular mass of the polymer was found to be [NCERT 1978]
Options:
A) $ 3.0\times 10^{2} $
B) $ 1.6\times 10^{5} $
C) $ 5.6\times 10^{4} $
D) $ 6.4\times 10^{2} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ \pi V=\frac{w}{m},RT $ \ $ 6\times {10^{-4}}\times 1=\frac{4}{m}\times 0.0821\times 300 $ ; $ m=1.64\times 10^{5} $ .
