MCQ
The oxidation state of $Cr$ in $Cr_2O_6$ is
- A$-6$
- B$+12$
- ✓$+6$
- D$+4$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A.$ $Sm ^{2+}$ $B.$ $Ce ^{2+}$ $C.$ $Ce ^{4+}$ $D.$ $Tb ^{4+}$
Choose the most appropriate answer from the options given below :
$(R = 0.083\, L\, bar\, K^{-1} \,mol^{-1})$