A) more than one in case of association
B) less than one in case of dissociation
C) equal to \[\frac{normal\,molecular\,mass}{observed\,molecular\,mass}\]
D) equal to \[\frac{observed\,molecular\,mass}{normal\,molecular\,mass}\]
Correct Answer: C
Solution :
vant Hoff factor (i) \[=\frac{normal\,mol.\,wt.}{observed\,mol.\,wt.}\] \[i>1\], dissociation \[i<1\], association \[i=1\]neither dissociation nor association Note: \[\left[ i=\frac{normal\,colligative\,property}{observedcolligative\,property\,} \right]\] \[i=1+(m-1)\alpha \] \[\alpha =\] degree of dissociation m = number of particles given by a molecule after dissociation.
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