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Explain why HNO(3) acts only as oxidisin...

Explain why `HNO_(3)` acts only as oxidising agent while `HNO_(2)` can act both as a reducing agent and an oxiding agent?

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Nitrogen can have oxidation numbers from -3 to +5. The oxidation number of nitrogen in `HNO_3` is +5. Thus, increase in oxidation number beyond +5 cannot occur. Hence, `HNO_3` cannot act as reducing agent. The oxidation number of nitrogen in `HNO_3` can only decrease, thus it acts as an oxidising agent. In `HNO_2` the oxidation number of nitrogen is +3. Thus, it can increase or decrease within the range 3 to +5, Hence, it can act as an oxidising as well as a reducing agent.
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NARAYNA-REDOX REACTION-Exercise -4
  1. Explain why HNO(3) acts only as oxidising agent while HNO(2) can act b...

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  2. Which of the following represents a redox reaction?

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  3. In the reaction SO(2)+2H(2)Srarr3S+2H(2)O the substance oxidised i...

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  4. In the reaction 3Cl(2)+6NaOHrarrNaClO(3)+5NaCl+3H(2)O the element ...

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  5. The oxidation number of oxygen in OF(2) is

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  6. An oxidation process involves

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  7. Which of the following is the strongest reducing agent in aqueous medi...

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  8. Which of the following is the strongest oxidising agent?

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  9. The oxidation number of phosphorus in Ba(H(2)PO(2))(2) is:-

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  10. Which of the following reactions do not involve oxidation reduction ? ...

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  11. For the redox reaction MnO(4)^(ө)+C(2)O(4)^(2-)+H^(o+)rarrMn^(2+)+CO...

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  12. The oxidation state of nitrogen is correctly given for

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  13. The oxidation state of chromium in Cr(CO)(6) is

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  14. Which of the following is not a redox reaction?

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  15. In the chemical reaction, K(2)Cr(2)O(7)+xH(2)SO(4)+ySO(2)rarrK(2)SO(...

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  16. One mole of N(2)H(4) loses ten moles of electrons of form a new compou...

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  17. When copper is treated with a certain concentration of nitric acid, ni...

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  18. In which of the following pairs is there the greatest difference in th...

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  19. In the reaction 3Br(2) + 6CO(3)^(2-) + 3H(2)O to 5Br^(-) + 2BrO(3)^(...

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  20. In the reaction 2FeCl(3)+H(2)Srarr2FeCl(2)+2HCl+S

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  21. The oxidation number of cobalt in K[Co(CO)(4)] is:

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