MCQ
is


- A

- ✓

- C

- D







Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$P\;,\;Q\;,\;R$
$A + O_2 \to B$ ;
$B + O_2 + H_2O \to C$
$A, B$ and $C$ are
$[Cr(NH_3)_6] [Cr(NO_2)_6]$ and $[Cr(NH_3)_4(NO_2)_2] \,[Cr(NH_3)_2(NO_2)_4]$