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Physical and Chemical Changes — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYPhysical and Chemical Changes1 Mark
Question
Balance the equations.
$HgO \rightarrow Hg + O _2$
✓

Answer

$2 HgO \rightarrow 2 Hg + O _2$

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