Select the correct statements from the following.
A. A coordination entity constitutes a central metal atom or ion bonded to variable number of ions or molecules for tetrahedral complex.
B. In compounds 
, the central atom/ion is a Lewis acid.
C. Oxalate ion can bind with metal ion through two donor atoms.
D. Coordination number of the central atom/ion can be determined by the number of pi bonds formed by ligand with central atom/ion.
E. The ionisable groups which are written outside the bracket are called counter ions.
Choose the correct answer from the options given below.
Text Solution
Verified by ExpertsB
Among the given statements, only 
and E are correct while the other statements 
and 
are incorrect. Their correct form is :
• A coordination entity constitutes a central metal atom or ion bonded to fixed number of ions or molecules for tetrahedral complex.
• Coordination number of the central atom/ion can be determined only by the number of sigma bonds formed by the ligand with the central atom/ion.
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