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JEE Main Chemistry Class 11 Solutions Part 1 Questions

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Question : 59

Total: 100

5g of Na2SO4 was dissolved in xg of H2O. The change in freezing point was found to be 3.82∘C. If Na2SO4 is 81.5% ionised, the value of x‌‌

[Online April 8, 2017]

(Kf for water =1.86∘Ckgmol−1) is approximately:
(molar mass of S=32gmol−1 and that of Na=23gmol−1 )

15g
25g
45g
65g

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