Chemistry · 2020
JEE Main · 6 September 2020, Shift 2 · Q42
For a reaction, 4 M ( s )+ nO_2( g ) → 2 M_2 O_n ( s ), the free energy change is plotted as a function of temperature. The temperature below which…
For a reaction,
$$4 \mathrm{M}(\mathrm{~s})+\mathrm{nO}_2(\mathrm{~g}) \rightarrow 2 \mathrm{M}_2 \mathrm{O}_{\mathrm{n}}(\mathrm{~s}),
$$
the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which :
Official answer
(3)
the free energy change shows a change from negative to positive value
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JEE Main 2020 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.