Count or pick complexes that contain monodentate or bidentate ligands from their names

This type of question, asked 3 times: 4 May 2023 S2, 10 May 2023 S2, 17 Apr 2026 S1. All 3 questions below, oldest first.

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Question 1
4 May 2023 S2
90 $Identify the total number of complexes having bidentate ligands in them from following list of complexes. (a) Tetracyanonickelate(II) ion (b) Trioxalatocobaltate(III) ion (c) Sodium hexafluoroaluminate(III) (d) bis(ethylenediamine)dithiocyanatoplatinum(IV)$
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Question 2
10 May 2023 S2
63 $Identify a complex having monodentate ligand from following:$
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Question 3
17 Apr 2026 S1
36 $Identify the total number of complexes from following list having monodentate ligands in them (a) Tetracyanonickelate (II) ion (b) Potassium hexafluoroaluminate (III) (c) Tetraamminecopper(II) ion (d) Potassium trioxalatoaluminate (III)$
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Question 1