Which of the following does not act as ligand in the formation of complexes?
Correct answer: D. NH4+
- A. CH3NH2
- B. OH-
- C. Cl-
- D. NH4+
Explanation
Ligand is a species that donates a lone pair of electrons by forming a dative coordinate bond with a central metal atom/ion. NH4+ has no lone pair of electrons because 4 of the valence electrons of nitrogen are involved in forming covalent bonds with hydrogen and 1 electron has been lost by it, being an ion of +1 charge. Therefore it cannot form a dative bond and hence cannot act as a ligand. The correct answer is therefore option D.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
Practise Transition Elements
532 free Transition Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Transition Elements questions
The octahedral geometry of the complex [Co(NH3)6]2+ has hybridization:
The total number of transition elements is:
Valence electronic configuration Cu+2 is (29Cu)
If a person is injected by shot of a gun and all the bullets are not removed from his body, it may cause poisoning by:
The chemical name of K2[Zn(OH)4] is:
Paramagnetic elements contain: