MCQ
The correct order of decreasing value of $K_{eq.}$ is
- A$a > b > c > d$
- ✓$d > a > b > c$
- C$d > b > a > c$
- D$d > a > c > d$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(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 :

