Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following statement(s) are correct for complex\[{{[Co{{(en)}_{2}}C{{l}_{2}}]}^{+}}\]? (1) The coordination number of Co is 6 (2) trans- form of the complex exhibits optical isomerism (3) The oxidation number of Co is +3 (4) en is a monodentate ligandA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: D
Solution :
For complex\[{{[Co{{(en)}_{2}}C{{l}_{2}}]}^{+}},\] C.N. of \[Co=+6\] Oxidation number of \[Co=+3\] Cis-form of the complex exists in d and I form ie, exhibits optical isomerism. (en is a bidentate ligand.)
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