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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
Result
Your answer:
—
·
Correct:
D
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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