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STANDARD Chemistry Colligative Properties MCQ Question

Type: MCQ-conceptual-Medium-Class 12

If α is the degree of dissociation of Na₂SO₄, the van't Hoff's factor (i) used for calculating the molecular mass is

A

1 + α

B

1 − α

C

1 + 2α

D

1 − 2α

Correct Answer

Option C

Detailed Explanation

Na₂SO₄ dissociates into 2Na⁺ and SO₄²⁻. The van't Hoff factor (i) is calculated as 1 + 2α, considering the dissociation into three ions.

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