The compound that cannot act both as oxidising and reducing agent is :
Show Hint
- \(\mathrm{H_3PO_4}\)
- \(\mathrm{H_2SO_3}\)
- \(\mathrm{H_2O_2}\)
- \(\mathrm{HNO_2}\)
The Correct Option is A
Solution and Explanation
\(\mathrm{H_3PO_4}\): P = +5, its maximum (group 15), so it cannot be oxidised further and P(+5) is not reduced under normal conditions.
\(\mathrm{H_2SO_3}\): S = +4, intermediate between -2 and +6, so it can be both oxidised and reduced.
\(\mathrm{H_2O_2}\): O = -1, intermediate between -2 and 0, so it can be both.
\(\mathrm{HNO_2}\): N = +3, intermediate between -3 and +5, so it can be both.
Hence \(\mathrm{H_3PO_4}\) cannot act as both.
Answer: (1) \(\mathrm{H_3PO_4}\)
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