Consider the following reaction : 2HgO ⎯⎯→ 2Hg + O₂ The respective sta

by

Consider the following reaction :
2HgO ⎯⎯→ 2Hg + O₂
The respective state of HgO, Hg and O₂ in the above reaction is

Liquid, solid, gas
Solid, solid, gas
Liquid, solid, liquid
Solid, liquid, gas
This question was previously asked in
UPSC NDA-2 – 2023
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Mercuric oxide (HgO) is a solid compound at room temperature. Mercury (Hg) is the only metal that exists as a liquid at room temperature. Oxygen (O₂) is a gas at room temperature. Therefore, the respective states of HgO, Hg, and O₂ are solid, liquid, and gas.
The physical states of substances at standard temperature and pressure (or implied conditions) are important in chemical reactions. Mercury is unique among metals in being liquid at room temperature.
This reaction represents the thermal decomposition of mercuric oxide. Heating HgO breaks it down into its constituent elements, mercury and oxygen. The states indicated correspond to the stable forms of these substances under normal conditions after the reaction.

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