The correct structure of ethylenediaminetetraacetic acid (EDTA) is
(A)(see structure)
(B)(see structure)
(C)(see structure)✓ Correct
(D)(see structure)
Answer: (C)
Solution
EDTA (ethylenediaminetetraacetic acid) has the structure with a central ethylenediamine backbone (–N–CH₂–CH₂–N–) where each nitrogen atom is bonded to two acetate arms (–CH₂–COOH). This gives EDTA its characteristic hexadentate chelating ability. Option C shows the correct structure with the ethylenediamine core and four carboxylic acid groups attached via methylene bridges to the two nitrogen atoms.
JEE Advanced · 2010 · 11 Apr 2010 · Paper 1 · Single correct option
