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\mathrm{X} and \mathrm{Y} are two volatile liquid with molar weight \mathrm{20 \mathrm{~g} \, \mathrm{mol}^{-1}} and \mathrm{500 \mathrm{g\, mol}^{-1}}Respectively.
Two cotton Plugs, one soaked in \mathrm{X}  and the other soaked in \mathrm{Y}. Are simultaneously Placed at the ends at a Tuke at length \mathrm{L=20 \mathrm{~cm}} as shown in figure.
The Tuke is filled with an gas at atomosphere pressure and temperature \mathrm{300\, k}. vapour at \mathrm{X} and \mathrm{Y} react from a product witch is first observed at a distance \mathrm{A \mathrm{~cm}} from the Plug soaked in \mathrm{X}.
Take \mathrm{X} and \mathrm{Y} to have equal molecular distance and assume ideal beterlaior of inentgas and the two vapors.


The value A in an
[shown in the figure] as estimates from Gratian's Law, is

 

Option: 1

16 cm


Option: 2

16.2 cm


Option: 3

19 cm


Option: 4

19.2 cm


Answers (1)

best_answer

\mathrm{\frac{r x}{r y}=\frac{A}{20-A}=\sqrt{\frac{500}{20}}=\sqrt{\frac{50}{2}}=25}

\mathrm{A=500-25 A}

\mathrm{26 A=500 }

\mathrm{26 A=500}\mathrm{26 A=500}\mathrm{A=\frac{500}{26}=19.9 \mathrm{~cm}}

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Divya Prakash Singh

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