JEE PYQ: Solutions And Colligative Properties Question 39
Question 39 - 2019 (09 Jan Shift 2)
A solution containing 62 g ethylene glycol in 250 g water is cooled to $-10°C$. If $K_f$ for water is 1.86 K kg mol$^{-1}$, the amount of water (in g) separated as ice is:
(1). (48)
(2). (32)
(3). (64)
(4). (16)
Show Answer
Answer: (3)
Solution
$10 = 1.86 \times \frac{1}{w/1000}$. $w = 186$ g (liquid water). Ice $= 250 - 186 = 64$ g.
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