1.

Three moles of PCl_(5) , three moles of PCl_(3) and two moles of Cl_(2) are taken in a closed vessel . If at equilibrium the vessel has 1.5 moles ofPCl_(5) , thenumber of moles of PCl_(3) present in it is

Answer»

6
4.5
5
3

Solution :`{:(PCl_(s(G))hArrPCl_(3(g))_Cl_(2(g))),("332(Initially)"),((3-x)""(3+x)""(2+2)" (At equilibrium)"):}`
Given that `(3-x)=1.5thereforex=1.5`
THEREFORE no. of moles of`PCl_(3(g))`present is
`=3+1.5=4.5`


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