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Q65
(NDA-II/2023)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Official Key
Consider the following reaction : A 2HgO 2Hg + O2 The respective state of HgO, Hg and O2 in the above reaction is
Explanation
The given chemical equation represents the thermal decomposition of Mercuric oxide (HgO). The physical states of the substances involved are as follows:
- HgO (Mercuric Oxide): It is a solid compound, usually found as a red or orange powder.
- Hg (Mercury): Mercury is a unique metal that remains in a liquid state at standard room temperature and pressure.
- O2 (Oxygen): Oxygen is a diatomic gas under standard conditions.
The complete balanced chemical equation with state symbols is: 2HgO(s) → 2Hg(l) + O2(g). Therefore, the respective states are solid, liquid, and gas, making Option D the correct answer.
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