Chemistry Transition Elements DUHS 2023
PMDC Verified Question 23 of 68
The ligand, diethylene triamine is an example of?
A
Bidentate
B
Tridentate
C
Pentadentate
D
Hexadentate
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Tridentate
Concept:

Ligands are classified by their denticity, which is the total number of lone electron pairs they can simultaneously donate to a central metal ion.

Solution:

  • The structure of diethylene triamine (often abbreviated as dien) is:
    \( H_2\ddot{N}-CH_2-CH_2-\ddot{N}H-CH_2-CH_2-\ddot{N}H_2 \)


  • Looking at the molecule, there are three distinct nitrogen atoms, each possessing a lone pair of electrons capable of forming a coordinate covalent bond.


  • Because it can bind at three specific sites, it is a tridentate ligand.


Why other options are incorrect:

  • Bidentate: Has 2 donor sites (e.g., ethylenediamine).


  • Hexadentate: Has 6 donor sites (e.g., EDTA).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All Transition Elements MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App