Question

What is " Tailing of mercury " ?

Answer 1

When ozone is passed through Mercury, it loses its meniscus and sticks to the glass due to the formation of mercurous oxide. This is called tailing of Mercury. 

Answer 2

Tailing of mercury

Explanation:

• When ozone and mercury are made to react it forms $Hg_2O$ as product which sticks on the wall of the container. This phenomenon is termed as tailing of mercury.
• The reaction involved in the process is as follows:

$O_3+2Hg\rightarrow Hg_2O+O_2$

• It is used as a laboratory test to detect the presence of ozone ($O_3$) and the tailing can be removed by treating $Hg_2O$ with hydrogen peroxide.
• The reaction involved is as followed:

$Hg_2O+H_2O_2\rightarrow 2Hg+H_2O+O_2$

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