alleryEDTA is a:
AMonodentate
BTetradentate
CBidentate
DHexadentate (4 oxygens + 2 nitrogens)
Answer & Solution
Correct answer: D. Hexadentate (4 oxygens + 2 nitrogens)
EDTA (ethylenediaminetetraacetate) is hexadentate: 4 O atoms (from carboxylate) + 2 N atoms.
Forms very stable 1:1 complexes with most metals (Ca²⁺, Fe³⁺, etc.).
Used in water softening, chelation therapy.
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