IUPAC nomenclature of mononuclear complexes — NEET & JEE Questions

Question 1 · difficulty L1 · recall

In naming a coordination complex, ligands are named

• A. before the metal
• B. after the metal only
• C. in order of charge magnitude
• D. only if they are anionic

Question 2 · difficulty L2 · understanding

Number of ambidentate ligands among the following is _________. $$\mathrm{NO}_2^{-}, \mathrm{SCN}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{NH}_3, \mathrm{CN}^{-}, \mathrm{SO}_4^{2-}, \mathrm{H}_2 \mathrm{O} \text {. }$$

Question 3 · difficulty L2 · understanding

The correct IUPAC name of $$[\mathrm{PtBr}_2(\mathrm{PMe}_3)_2]$$ is :

• A. bis(trimethylphosphine)dibromoplatinum(II)
• B. dibromodi(trimethylphosphine)platinum(II)
• C. dibromobis(trimethylphosphine)platinum(II)
• D. bis[bromo(trimethylphosphine)]platinum(II)

Question 4 · difficulty L2 · understanding

The IUPAC name of $$\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]$$ is:-

• A. Potassium tris(oxalato)cobalt(III)
• B. Potassium tris(oxalato)cobaltate(III)
• C. Potassium trioxalatocobaltate(III)
• D. Potassium trioxalatocobalt(III)

Question 5 · difficulty L2 · understanding

As per IUPAC nomenclature, the name of the complex $$[Co{({H_2}O)_4}{(N{H_3})_2}]C{l_3}$$ is

• A. Tetraaquadiaminecobalt (III) chloride.
• B. Tetraaquadiamminecobalt (III) chloride.
• C. Diaminetetraaquacobalt (III) chloride.
• D. Diamminetetraaquacobalt (III) chloride.

Question 6 · difficulty L3 · understanding

One mole of the octahedral complex compound $\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}_3$ gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess of $\mathrm{AgNO}_3$ solution to yield two moles of $\mathrm{AgCl}_{(\mathrm{s})}$. The structure of the complex is:

• A. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}_2$
• B. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}\right] \cdot \mathrm{Cl}_2 \cdot \mathrm{NH}_3$
• C. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right] \cdot 2 \mathrm{NH}_3$
• D. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \cdot \mathrm{Cl} \cdot \mathrm{NH}_3$

Question 7 · difficulty L3 · understanding

In the complex acetylbromidodicarbonylbis(triethylphosphine) iron(II), the number of Fe-C bond(s) is ___________.

Question 8 · difficulty L3 · understanding

The IUPAC name of [Ni(NH$$_3$$)$$_4$$] [NiCl$$_4$$] is :

• A. Tetrachloronickel (II) - tetraamminenickel (II)
• B. Tetraamminenickel (II) - tetrachloronickel (II)
• C. Tetraammnenickel (II) - tetrachloronickelate (II)
• D. Tetrachloronickel (II) - tetraamminenickelate (0)

Question 9 · difficulty L3 · understanding

The IUPAC names of $$\mathbf{A}$$ and $$\mathbf{B}$$ are

• A. Potassium tetracyanonickelate (II), potassium tetrachloronickelate (II).
• B. Tetracyanopotassiumnickelate (II), teterachloroptassiumnickelate (II).
• C. Tetracyanonickel (II), tetrachloronickel (II).
• D. Potassium tetracyanonickel (II), potassium tetrachloronickel (II).

Question 10 · difficulty L3 · understanding

Which one of the following is an ambidentate ligand?

• A. Ethane-1,2-diamine
• B. Ethylenediaminetetraacetate ion
• C. Thiocyanate
• D. Oxalate