NEET | 2017Hydrogen and its compoundHard

Question

HgCl2 and I2 both when dissolved in water containing I- ions the pair of species formed is :

Options

A.

HgI2, I-

B.

HgI42-,I3-

C.

Hg2I2,I-

D.

HgI2, I3-

Solution

HgCl2+ 2I-→–HgI2+2Cl-
                                      + 2I+[HgI4]-2
Soluble complex
I2 + I-→I3-
      water soluble

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