Verified Solution • 2025–26 Session moderate

QJEEM23Chbe05: JEE Main 2023 Chemistry - Class 11 JEEM23Chbe05 Solution: Which of the following options are correct for the reaction A.…

Which of the following options are correct for the reaction

2[Au(CN)2]−(aq)+Zn(s)→2Au(s)+[Zn(CN)4]2−(aq)2\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \rightarrow 2 \mathrm{Au}(\mathrm{s})+\left[\mathrm{Zn}(\mathrm{CN})_{4}\right]^{2-}(\mathrm{aq})

A. Redox reaction

B. Displacement reaction

C. Decomposition reaction

D. Combination reaction

Choose the correct answer from the options given below:

Multiple Choice Options

  • A A and B only
  • B C and D only
  • C A only
  • D A and D only

Step-by-Step Verified Solution

2[Au+1(CN)2]−+Z0n(s)⟶2Au0+[Zn+2(CN)4]−22\left[\stackrel{+1}{\mathrm{Au}}(\mathrm{CN})_2\right]^{-}+\stackrel{0}{\mathrm{Z}} \mathrm{n}(\mathrm{s}) \longrightarrow 2 \stackrel{0}{\mathrm{Au}}+\left[\stackrel{+2}{\mathrm{Zn}}(\mathrm{CN})_4\right]^{-2}

Zn\mathrm{Zn} displaced Au+\mathrm{Au}^{+}

Reduction and Oxidation both are taking place.

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