1.

Which of the following statemetns about tailing of `Hg` is`//`are correct?A. It is due to `Hg_(2)O`.B. It is due to `HgO`C. It is removed by `H_(2)O_(2)`D. It is removed by `O_(3)`

Answer» Correct Answer - A::C
In tailing of `Hg`, it loses its meniscus and sticks to glass, due to solubility of `Hg_(2)O "in" Hg`, when `Hg` gets
oxidised to `Hg_(2)^(2+)` by `O_(3)`. It is removed by `H_(2)O_(2)`.
`2Hg+O_(3)rarrHg_(2)O+O_(2)`
`Hg_(2)O+H_(2)O_(2)rarr2Hg+H_(2)O+O_(2)`.


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