Q.

The van't Hoff factor,(i) for a dilute aqueous solution of Na2SO4 is

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a

1+α

b

1+2α

c

12α

d

1α

answer is C.

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Detailed Solution

Na2SO4=2Na+SO421001α2αα

where α is degree of dissociation

 i=1α+2α+α=1+2α

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