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The pair in which phosphours atoms have ...

The pair in which phosphours atoms have a formed oxidation state of `+3` is

A

phrophosphorous and hypophosphoric acids

B

orthophosphorous and hypophosphoric acids

C

pyrophosphorous and pyrophosphoric acids

D

orthophosphorous and pyrophosphorous acids

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The correct Answer is:
B
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IIT-JEE PREVIOUS YEAR (CHEMISTRY)-P BLOCK ELEMENTS-Objective Questions I
  1. The order of the oxidation state of the phosphours atom in H(3)PO(2),H...

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  2. The species in which the N-atom is in a state of sp hybridisation is

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  3. The pair in which phosphours atoms have a formed oxidation state of +3...

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  4. The product formed in the reaction of SOCl2 (thionyl chloride) with wh...

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  5. Which of the following properties is not shown by NO ?

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  6. Concentrated HNO3, upon long standing, turns yellow-brown due to the f...

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  7. Which of the following is the wrong statement ?

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  8. The reaction of white phosphorus with aqueous NaOH gives phosphine alo...

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  9. Which ordering of compounds is according to the decreasing order of th...

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  10. Extra pure N2 can be obtained by heating

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  11. The reaction of P with X leads selectively to P4 O6. X is

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  12. The percentage of p-character in the orbitals forming p-p bonds in P4 ...

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

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  14. Which gas is evolved when PbO(2) is treated with conc HNO(3) ?

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  15. Blue liquid which is formed at - 30^@ C by mixing of two gases is.

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  16. Thermodynamically most stable allotrope of phosphorus is :

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  17. Which of the following oxoacids of sulpher has -O-O- linkage ?

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  18. For H(3)PO(3) and H(3)PO(4) the correct choice is

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  19. Polyphosphates are used for softening agents because they

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  20. The number of S-S bonds, in sulpher trioxide trimer (S(3)O(9)) is :

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