Need help in studying chapters - solutions and electrochemistry

I have to study two chapters solution and electrochemistry which to study first some said electro chapter has use of solution too so study that first is it correct?

Start solutions first , also it's easy than electro

Ok one more question 12th physical more important or 11th physical chemistry regarding revision ?

11th only thermo dynamic and equilbruim but 12th one is mostly easy and shortones