Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI = 166 g mol–1)

  1. A

    1.48

  2. B

    1.51

  3. C

    1.08

  4. D

    1.35

Solution

20% W/W KI solution

i.e. 100 g solution contains 20 g KI

Mass of solvent = 100 – 20 = 80 g

Molality =

1.51 molar

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