Question

The vapour density of `Pcl_(5)` is `104.16` but when heated to `230^(@)C`, its vapour density is reduced to `62`. The degree of dissociation of `PCl_(5)` at `230^(@)C` is …………
A. `6.8%`
B. `68%`
C. `46%`
D. `64%`

Answer 1

Correct Answer - B
`PC1_(5)(g)hArrPC1_(3)(g) + C1_(2)(g)`
`1+alpha =(D)/(d)`
`1+alpha =(104.25)/(62)` `1+alpha=1.68`
`:. alpha = 0.68` or `68%`