If\[\alpha \]is the degree of dissociation of\[N{{a}_{2}}S{{O}_{4}},\] the van't Hoff factor (i) used for calculating the molecular mass is
AIEEE Solved Paper-2005
A)\[1-2\alpha \]
B) \[1+2\alpha \]
C) \[1-\alpha \]
D) \[1+\alpha \]
Correct Answer:
B
Solution :
van't Hoff factor where, y is the number of ions from one mole solute, (in this case=3 ), the degree of dissociation. Alternate Solution