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Q.

Van't Hoff factor for 0.1 M MgSO4 solution is 1.42 and for 0.001M MgSO4 solution is 1.92. What is van't Hoff factor for 0.01 M MgSO4 solution is

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a

1.85

b

1.26

c

2.5

d

0.26

answer is A.

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Detailed Solution

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When concentration is low, electrolyte gets more space to dissociate more and hence, number of ions in the solutions gets increased. Therefore, van't Hoff factor for dissociation increases.

In the given problem, the van't Hoff factor of 0.01 M MgSOis more than 0.1 M MgSO4 solution but less than 0.001M MgSO4 solution.

Hence, option (A) is the suitable option.

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