1
JEE Main 2020 (Online) 5th September Morning Slot
Numerical
+4
-0
The total number of coordination sites
in ethylenediaminetetraacetate (EDTA4–) is _____.
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2
JEE Main 2020 (Online) 2nd September Morning Slot
Numerical
+4
-0
The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are x, y and z. The sum of x, y and z is ________.

Na4[Fe(CN)5(NOS)]
       (A)

Na4[FeO4]
       (B)

[Fe2(CO)9]
       (C)
Your input ____
3
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
Complexes (ML5) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal grometries, respectively. The sum of the 90°, 120° and 180° L-M-L angles in the two complexes is ________.
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