MCQ
Oxidation state of chlorine in perchloric acid is
- A$-1$
- B$0$
- C$-7$
- ✓$+7$
$1 + x - 2 \times 4 = 0;\,\,1 + x - 8 = 0$
$x = 8 - 1 = + 7$ oxidation state.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

If the oxidation number of metal in the salt was $3$, what would be the new oxidation number of metal ?
$\mathrm{S}_2 \mathrm{O}_3^{2-}, \mathrm{SO}_4^{2-}, \mathrm{SO}_3^{2-}, \mathrm{S}_2 \mathrm{O}_7^{2-}$