JEE PYQ: Solutions And Colligative Properties Question 46
Question 46 - 2019 (12 Jan Shift 2)
Freezing point of a 4% aqueous solution of X is equal to freezing point of 12% aqueous solution of Y. If molecular weight of X is A, then molecular weight of Y is:
(1). (3A)
(2). (2A)
(3). (A)
(4). (4A)
Show Answer
Answer: (1)
Solution
$(\Delta T_f)_X = (\Delta T_f)_Y$. $\frac{4}{A \times 96} = \frac{12}{m_y \times 88}$. $m_y \approx 3A$.
BETA
