Question 20
We have three aqueous solutions of NaCl labelled as 'A', 'B' and 'C' with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of van't Hoff factor for these solutions will be in the order ........... .
(a) $i_{A} < i_{B} < i_{C}$ (b) $i_{A} > i_{B} > i_{C}$ (c) $i_{A} = i_{B} = i_{C}$ (d) $i_{A} < i_{B} > i_{C}$

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Solution

As vant off factor depends only on number of dissociated ions. Hence i will be independent of the concentration of ions.Thus option c is the correct answer.

(c) $i_{A} = i_{B} = i_{C}$

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