Q.
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a
In oxoanions of Cr and Mn (CrO4−2,Cr2O7-2 ,MnO4− ,MnO4−2) the pi bond formation involves overlap of d-orbital of transition metal and p-orbital of oxygen
b
Colour of Permanganate, Chromate and dichromate is due to charge transfer from LLigand → M(Metal)
c
The starting material to prepare K2Cr2O7 is Chromite ore(FeO.Cr2O3)
d
K2Cr2O7 is more soluble in water than Na2Cr2O7
answer is D.
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