Q. How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a ${Ca}^{2 +}$ ion?
A) Six
B) Three
C) One
D) Two
Explanation
(c)
EDTA (Ethylenediaminetetraacetic acid)
[image:9_image181.emf]It is hexadentate (6 electron pairs)
that’s why for octahedral complex only one EDTA is required.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.