Write structure of phthalic acid

Answer

b

Explanation

(b) `3A(g)ltimpliesA_(3)(g)`
`{:(t=0,1.2atm,A_(3)(g)),(t=t_(eq.),1.2-0.36,(1)/(3)(0.36)=0.12atm):}`
`:. " "P_(T)`=1.2=0.36+0.12=0.96 atm
`:.` Pressure difference in column
=1 - 0.96=0.04 atm
`:.` The difference in height of the liquid level in two columns=`0.04xx190=7.6cm`