MCQ
Maximum oxidation state central atom is present in
- ✓$CrO_2Cl_2$ and $MnO_4^-$
- B$MnO_2$
- C$[Fe(CN)_6)]^{3-}$ and $[Co(CN)_6]^{3-}$
- D$MnO$
$Ni ( CO )_4 \Rightarrow 28+4 \times 2=36$
$(i)$ $V ( CO )_6 \Rightarrow 23+2 \times 6=35$
$(ii)$ $Cr ( CO )_5 \Rightarrow 24+2 \times 5=34$
$(iii)$ $Cu ( CO )_3 \Rightarrow 29+2 \times 3=35$
$(iv)$ $Mn ( CO )_5 \Rightarrow 25+2 \times 5=35$
$(v)$ $Fe ( CO )_5 \Rightarrow 26+2 \times 5=36$
$(vi)$ $\left[ Co ( CO )_3\right]^{3-} \Rightarrow 27+3+2 \times 3=36$
$(vii)$ $\left[ Cr ( CO )_4\right]^{4-} \Rightarrow 24+4+2 \times 4=36$
$(viii)$ $\left[\operatorname{Ir}( CO )_3\right] \Rightarrow 77+2 \times 3=83$
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$(A)$ Reduction of $HCHO$
$(B)$ Oxidation of $HCHO$
$(C)$ Reduction of $PhCHO$
$(D)$ Oxidation of $Ph-CHO$
$A\xrightarrow{NaN{{O}_{2}}/HCl}B\xrightarrow{KCN}C\xrightarrow{{{H}_{3}}{{O}^{+}}}$ benzoic acid
The compound $ A$ is
| List-$I$ | List-$II$ | ||
| $A$ | $[Fe(H_2O)_6]^{2+}$ | $P$ | $0$ |
| $B$ | $[Fe(H_2O)_6]^{3+}$ | $Q$ | $1$ |
| $C$ | $[Fe(CN)_6]^{4-}$ | $R$ | $2$ |
| $D$ | $[Fe(CN)_6]^{3-}$ | $S$ | $4$ |
| $E$ | $[Ni(H_2O)_4]^{2+}$ | $T$ | $5$ |
$A$ $||$ $B$ $||$ $C$ $||$ $D$ $||$ $E$