MCQ
Identify compound $(\mathrm{Z})$ in the following reaction sequence.
  • A

  • B


  • D

Answer

Correct option: C.

c

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List $I$ List $II$
$P.$ $\quad E ^{\circ}\left( Fe ^{3+}, Fe \right)$ $1.$ $\quad-0.18 V$
$Q.$ $\quad E ^{\circ}\left(4 H _2 O \rightleftharpoons 4 H ^{+}+4 OH ^{-}\right)$ $2.$ $\quad-0.4 V$
$R.$ $\quad E ^{\circ}\left( Cu ^{2+}+ Cu \rightarrow 2 Cu ^{+}\right)$ $3.$ $\quad-0.04 V$
$S.$ $\quad E ^{\circ}\left( Cr ^{3+}, Cr ^{+2}\right)$ $4.$ $\quad-0.83 V$

Codes: $ \quad P \quad Q \quad R \quad S $ 

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[At. No.: $Cr= 24,\,Mn= 25, \,Fe= 26, \,Co= 27$]