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Strong reducing behaviour of H(3)PO(2) i...

Strong reducing behaviour of `H_(3)PO_(2)` is due to

A

high electron gain enthalpy of phosphorus

B

high oxidation state of phosphorus

C

presence of two `-OH` groups and one P-H bond

D

presence of one `-OH` group and two P-H bonds.

Text Solution

Verified by Experts

The correct Answer is:
D
Presence of two P-H bonds is responsible for the strong reducing character of `H_(3)PO_(2)`.
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(a) Why does PCl_3 fume in moisture ? (b) Are all the five bonds in PCl_5 molecule equivalent ? Justify your answer. ( c) How do you account for the reducing behaviour of H_3 PO_2 on the basic of its structure ? (d) Give the disproportional reaction of H_3PO_3 .

Assertion : H_(3)PO_(2) has strong reducing property but H_(3)PO_(4) does not. Reason : P-OH bond present in H_(3)PO_(4) .

DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Multiple Choice Questions Bank MCQ
  1. Acidity of diprotic acids in aqueous solutions increases in the order

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  2. The variation of the boiling points of the hydrogen halides is in the ...

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  3. Strong reducing behaviour of H(3)PO(2) is due to

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  4. Which of the following statements is incorrect ?

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  5. Which of the following sets of molecules contains the same number of l...

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  6. Which one of the following does not match with respect to the shape o...

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  7. Which of the following oxides of nitrogen contains N-O-N bond ?

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  8. The brown ring rest test for nitrates depends upon :

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  9. Which of the following statement is correct for the given acids?

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  10. When copper is heated with conc. HNO(3) it produces?

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  11. Among the following, the correct order of acidity is:

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  12. The hybridisatipon of atomic orbitals of nitrogen in NO(2)^(+),NO(3)^(...

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  13. Hot concentrated sulpuric acis is a moderatly strong oxidizing agent. ...

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  14. The correct geometery and hybridizationn for XeF(4) are

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  15. Among the following ,which one is the wrong statement

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  16. In which pair of ions both the species contains S - S bond?

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  17. Which of the following is not true for halogens ?

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  18. Which one is the correct observation when Br(2) is treated with NaF, N...

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  19. Which of the following is true for N(2)O(5) ?

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  20. Which of the following statements is incorrect ?

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