किस प्रतम में प्रपलन नितित है (A) \( \mathrm{ZnCO}_{3} \rightarrow \mathrm{ZnO}+\mathrm{CO}_{2} ...

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किस प्रतम में प्रपलन नितित है
(A) \( \mathrm{ZnCO}_{3} \rightarrow \mathrm{ZnO}+\mathrm{CO}_{2} \)
(B) \( \mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{C} \longrightarrow 2 \mathrm{Fe}+3 \mathrm{CO} \)
(C) \( 2 \mathrm{PbS}+3 \mathrm{O}_{2} \longrightarrow 2 \mathrm{PbO}+2 \mathrm{SO}_{2} \)
(D) \( \mathrm{A}_{2} \mathrm{O}_{3} \cdot \mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{A}_{2} \mathrm{O}_{3}+2 \mathrm{H}_{2} \mathrm{O} \)
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