MCQ
$Zn $ is related to which group
- ✓$IIB$
- B$IIA$
- C$IA$
- D$IB$
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(Atomic numbers $Ce =58, Gd =64$ and $Eu =63 .)$
$(a)$ $\left( NH _{4}\right)_{2}\left[ Ce \left( NO _{3}\right)_{6}\right]$
$(b)$ $Gd \left( NO _{3}\right)_{3}$ and
$(c)$ $Eu \left( NO _{3}\right)_{3}$
Answer is :
$MnO_4^ - $ ${C_2}O_4^{2 - }$ ${H^ + }$