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AIIMS 2010
Exam
AIIMS
Year
2010
Subject
Chemistry
Chapter
Electrochemistry

AIIMS 2010 · Chemistry · Electrochemistry

For the electrochemical cell, M|M^ + \| X^ - | X , E^ (M^ + M)=0.44...

For the electrochemical cell, M∣M+∥X−∣XM\left|M^{+} \| X^{-}\right| X, E∘(M+∣M)=0.44 VE^{\circ}\left(M^{+} \mid M\right)=0.44 \mathrm{~V} and E∘(X∣X−)=0.33 VE^{\circ}\left(X \mid X^{-}\right)=0.33 \mathrm{~V}. From this data one can deduce that

Options

  1. AM+X→M++X−M+X \rightarrow M^{+}+X^{-}is the spontaneous reaction
  2. BM++X−→M+XM^{+}+X^{-} \rightarrow M+X is the spontaneous reaction
  3. CEcell =0.77E_{\text{cell }}=0.77V\mathrm{ V}
  4. DEcell =−0.77E_{\text{cell }}=-0.77V\mathrm{ V}

Correct answer

B. M++X−→M+XM^{+}+X^{-} \rightarrow M+X is the spontaneous reaction

Step-by-step solution

M++X−→M+XM^{+}+X^{-} \rightarrow M+X is spontaneous because for the cell represented by M∣M+∥X∣XM\left|M^{+} \| X\right| X, the value of E∘E^{\circ} is positive i.e. (0.44−0.33)V=0.11 V(0.44-0.33) \mathrm{V}=0.11 \mathrm{~V}.
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