MCQ
Complexes $[Co(NH_3)_5SO_4]Br$ and $[Co(NH_3)_5Br]SO_4$ can be distinguished by
- Aconductance measurement
- Busing $BaCl_2$
- Cusing $AgNO_3$
- ✓all
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$[Figure]$ $\xrightarrow[{2.\,C{H_3}I\,(l.\,eq.)}]{{1.\,{K_2}C{O_3}}}$

(Given: Atomic number: $V , 23 ; Cr , 24 ; Fe , 26;Ni , 28)$
$V ^{3+} \cdot Cr ^{3+}, Fe ^{2+}, Ni ^{3+}$
Product in above reaction is