K2 (Cu(CN)4) which one is correct

Question:K2 (Cu(CN)4) which one is correct

1.Potassium tetra cyano cupperate

2.Co-ordination number is 2

3.Ligand is positively charged

4.Central atom is present in avionic sphere

R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!