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JEE Main Chemistry question

ChemistrySolutionsJEE Main

An 1% solution of KCl (I), NaCl (II), (III) and urea (IV) have their osmotic pressure at the same temperature in the ascending order (molar masses of NaCl, KCl, and urea are respectively 58.5, 74.5, 208.4 and 60 g ). Assume 100% ionisation of the electrolytes at this temperature [Kerala CEE 2009]

Answer: (D)

Solution

For 1% (10 g/L) of each: effective particle concentration (mol/L ions) is ; urea: ; KCl:

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Question ID VK-143083