MolSynapsequestion bank

MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Oxygen, ozone and oxides

JEE Main levelSingle correct optionDifficulty 2 of 3pn064

Mercury loses its meniscus and sticks to glass (tailing) on exposure to ozone because

Amercury dissolves in ozone to form a liquid amalgam
B $HgO$ is formed and dissolves in mercury
Ca thin film of $Hg X_{2} O$ is formed
Dmercury is reduced by ozone to $Hg X^{2 +}$

Answer: C

2 Hg + O X_{3} Hg X_{2} O + O X_{2}

. The oxide film changes the surface tension of mercury, so it clings to glass and the meniscus is lost.

Practice p-Block Elements: Groups 15 and 16 More on Oxygen, ozone and oxides

Previous questionNext question

More questions on Oxygen, ozone and oxides