If $\alpha$ is the degree of dissociation of $\mathrm{Na}_2 \mathrm{SO}_4$, the vant Hoff's factor (i) used…

If $\alpha$ is the degree of dissociation of $\mathrm{Na}_2 \mathrm{SO}_4$, the vant Hoff's factor (i) used for calculating the molecular mass is
  1. $1+\alpha$
  2. $1-\alpha$
  3. $1+2 \alpha$
  4. $1-2 \alpha$

Solution


Total moles $=1+2 \alpha$

Asked in: JEE Main 2005

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