MCQ
Which of the following is spin-free complex?
- ✓$[Fe(H_2O)_6] Cl_2$
- B$K_4[Fe(CN)_6$
- C$[Ni(CO)_4]$
- D$[Ni(CN)_4]^{2-}$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A(g) + B(g) \to C(g)$ $\Delta U=\,-\,3\,Kcal$
$\Delta S=\,-\,10\,cal/K$
value of $\Delta G$ will be ......$cal$
