Is O.P.Tandon a better book or J.D.Lee? I have OP Tandon. So can i continue with it or buy JD Lee as well?Is there a very big difference between those 2 books?

Total number of structural isomers of 
[Co(NH₃)₆][Cr(CN)₆]

Why is boiling point of Cesium higher than that of Rubidium

 

which isomer mentioned in (a) is water soluble and why?

A gaseous mixture contains CO2 and CO the mass of the mixture is 200g and they are presenting equal fraction of moles . Find the total no. of O-atoms present in the mixture.