Q43 / 150 · MHT CET 2019 (02 May Shift 1) · Chemistry

If the Vant Hoff factor for $0.1 M B a {(N O_{3})}_{2}$ solution is $2.74,$ the degree of dissociation is

Correct answer
A
$0.87$
B
$0.74$
C
$0.91$
D
$87$

Solution

B a {(N O_{3})}_{2} ⇌ B a^{2 +} + 2 N O_{3}^{-}; n = 3

α = \frac{i - 1}{n - 1} = \frac{2.74 - 1}{3 - 1} = 0.87

Hence, the correct answer is option: 'A'.

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