PYQ NEET- Redox Reactions L-8

Question: Which of the following reactions is the metal displacement reaction?#

(2021)

A) $\mathrm: \mathrm{Fe}+2 \mathrm{HCL} \rightarrow \mathrm{FeCl}_2+\mathrm{H}_2 \uparrow$

B) $2 \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2 \rightarrow 2 \mathrm{PbO}+4 \mathrm{NO}_2+\mathrm{O}_2 \uparrow$

C) $2 \mathrm{KClO}_3 \stackrel{\Delta}{\rightarrow} 2 \mathrm{KCL}+3 \mathrm{O}_2$

D) $\mathrm{D}: \mathrm{Cr}_2 \mathrm{O}_3+2 \mathrm{Al} \stackrel{\Delta}{\rightarrow} \mathrm{Al}_2 \mathrm{O}_3+2 \mathrm{Cr}$

Answer: $\mathrm{D}: \mathrm{Cr}_2 \mathrm{O}_3+2 \mathrm{Al} \stackrel{\Delta}{\rightarrow} \mathrm{Al}_2 \mathrm{O}_3+2 \mathrm{Cr}$#