Questions
What mass of urea be dissolved in 171 g of water so as to decrease the vapour pressure of water by 5%?
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By Expert Faculty of Sri Chaitanya
a
15 g
b
20 g
c
25 g
d
30 g
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Correct option is D
∆PPA°=XB=0.05 (given) 0.05 =nBnB+nA=nBnB+17118 ⇒nB = 0.5 ⇒Wurea= 0.5×60= 30 gSimilar Questions
Which of the following liquid pairs shows a positive deviation from Raoults law ?
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