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NEET · Chemistry · STD 11 - 7. Redox reactions

निम्न अभिक्रियाओं में से कौन धातु विस्थापन अभिक्रिया है ? सही विकल्प चुनें।

  1. A \(2 \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{KCl}+3 \mathrm{O}_{2}\)
  2. B \(\mathrm{Cr}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \stackrel{\Delta}{\longrightarrow} \mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{Cr}\)
  3. C \(\mathrm{Fe}+2 \mathrm{HCl} \rightarrow \mathrm{FeCl}_{2}+\mathrm{H}_{2} \uparrow\)
  4. D \(2 \mathrm{~Pb}\left(\mathrm{NO}_{3}\right)_{2} \rightarrow 2 \mathrm{PbO}+4 \mathrm{NO}_{2}+\mathrm{O}_{2} \uparrow\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\mathrm{Cr}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \stackrel{\Delta}{\longrightarrow} \mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{Cr}\)

Step-by-step Solution

Detailed explanation

\(\mathrm{Cr}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \stackrel{\Delta}{\longrightarrow} \mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{Cr}\)
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