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.
Last updated
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
531 free Transition Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A cobalt-amine has the formula Co(NH3)6Cl3. With AgNO3 solution, one third of the chloride is precipitated. The complex shows cis-trans isomerism. It can have the structure:
A complex compound of cobalt has a molecular formula containing five NH3 molecules, one nitro group and two chlorine atoms for one Co atom. One mole of this compound produces three moles of ions in an aqueous solution. On reacting with excess AgNO3 solution, two moles of AgCl get precipitated. The ionic formula of the compound is?
A compound having coordination number 6 has geometry:
A coordination complex compound of cobalt has a molecular formula containing five ammonia molecules, one nitro group, and two chlorine atoms for one cobalt atom. One mole of this compound produces three-mole ions in an aqueous solution. By the reaction of this solution with excess silver nitrate solution, two molecules of AgCl get precipitated. The ionic formula of this compound would be:
Acidified K₂Cr₂O₇ is also called: