1.

For colourless solution obtained in column-3 , the incorrect option is :

Answer»

3,b,R
4,b,P
3,a,Q
4,b,R

Solution :`Cu^(2+)+"excess"CN^(-)to underset("colourless SOL")([Cu(CN)_4]^(3-))`
`Cu^(+) , 3d^(10) implies sp^3` , diamagnetic & tetrahedral
`ZN^(2+)+"excess"NH_3(aq)tounderset("Colourless solution")([Zn(NH_3)_4]^(2+))`
`Zn^(2+), 3d^10 implies sp^3` tetrahedral diamagnetic


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