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Phosphorus has the oxidation state of +3...

Phosphorus has the oxidation state of +3 in

A

Orthophosphoric acid `(H_(3)PO_(4))`

B

Phosphorus acid `(H_(3)PO_(3))`

C

Metaphosphoric acid `(HPO_(3))`

D

Pyrophosphoric acid `(H_(4)P_(2)O_(7))`

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-REDOX REACTIONS-ASSIGNMENT SECTION - A
  1. The oxidation number of sulphur in H(2)S(2)O(8) is:

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  2. In which of the following compounds iron has lowest oxidation number?

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  3. Phosphorus has the oxidation state of +3 in

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  4. The brown ring complex compound is formulated as [Fe(H(2)O)(5)NO]SO(4)...

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  5. Oxidation number of Cr in CrO(5) is

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  6. In which of the following compounds , the oxidation number of iodine i...

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  7. Which reaction involves neither oxidation nor reduction?

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  8. In a chemical reaction, K(2)Cr(2)O(7)+xH(2)SO(4)+ySO(2) to K(2)SO(4)+ ...

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  9. What is the oxidation state of sodium in sodium amalgam (Na//Hg)?

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  10. Which of the following will not be oxidised by O(3) ?

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  11. In alkaline medium , KMnO(4) reacts as follows 2KMnO(4)+2KOH rarr 2K...

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  12. The equivalent weight of FeS(2) in the following reaction is FeS(2)+O(...

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  13. When SO(2) is passed inoto an acidified potassium dichromate soltion, ...

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  14. How many mole of FeSO(4) reacted with one mole of KMnO(4) in acidic me...

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  15. A compound of Xe and F is found to have 53.3% Xe (atomic weight = 133)...

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  16. Which of the following is not correct for electrochemical cell?

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

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  18. Redox reaction have no concern with

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  19. n factor of nitrobenzene in this process

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  20. In this process of photosynthesis, which takes place in green plants w...

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