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Q.

Which of the following statements about tailing of Hg is/ are correct?

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a

It is due to Hg2O

b

It is due to HgO

c

It is removed by H2O2

d

It is removed by O3

answer is A.

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Detailed Solution

In tailing of Hg, it loses its meniscus and sticks to glass, due to solubility of Hg2O in Hg, when Hg gets oxidised to Hg22+ by O3. It is removed by H2O2.2Hg+O3⟶Hg2O+O2Hg2O+H2O2⟶2Hg+H2O+O2
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