Answer:
Option A
Explanation:
Given,
Molarity =0.1 M
vant Hoff factor (i)=2.74
Since, i >1, it means solute is undergoing dissociation.
Ba(NO3)2⇌Ba2++2NO−3
Number of particles dissociated (n)=3
Now, α ( degree of dissociation )= (i−1)(n−1)
= (2.74−1)(3−1)=0.87