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White phosphorus reacts with caustic sod...

White phosphorus reacts with caustic soda to form `PH_(3)` and `NaH_(2) PO_(2)`. This reaction is an example of

A

oxidation

B

reduction

C

disproportionation

D

displacement

Text Solution

Verified by Experts

The correct Answer is:
C
`overset(0)P+3NaOH+3H_(2)Orarr3NaH_(2)overset(+1)PO_(2)+overset(-3)PH_(3)`
`overset(0)PrarrNaH_(2)overset(+1)PO_(2)` (Oxidation)
`overset(0)Prarr overset(-3)PH_(3)` (Reduction)
Simultaneous oxidation and reduction is disproportionation.
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White P reacts with caustic soda, the products are PH_(3) and NaH_(2)PO_(2) . This reaction is an example of:

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White phosphorous on reaction with NaOH gives PH_(3) and

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Which element on treatment with caustic soda solution produces H_(2) gas?

The reaction, P_(4)+3NaOH+3H_(2)O to 3NaH_(2)PO_(2)+PH_(3) is an example of

Phosphoric acid (H_3PO_4) prepared in a two step process. (1) P_4+5O_2rarrP_4 O_10 (2) P_4 O_10+6H_2Orarr4H_3 PO_4 We allow 62g of phosphorus to react with excess oxygen which form P_4 O_10 in 85% yield. In the step (2) reaction 90% yield of H_3PO_4 is obtained. mass of H_3PO_4 produced is :

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NCERT FINGERTIPS ENGLISH-REDOX REACTIONS-MCQs (OXIDATION NUMBER)
  1. Which of the following is a disproportionation reaction?

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  2. Which of the following is not an example of disproportionation reactio...

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  3. White phosphorus reacts with caustic soda to form PH(3) and NaH(2) PO(...

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  4. What is the oxidation number of carbon in C(3)O(2) ( carbon suboxide )...

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  5. In the conversion of Br(2)toBrO(3)^-1 the oxidation state of bromine c...

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  6. Permanganate (VII) ion, MnO(4)^(-) oxidises I^(-) ion to I(2) and giv...

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  7. Choose correct statements (s) regarding the following reactions. Cr(...

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  8. The Mn^(3+) ion is unstable in solution and undergoes disproportionati...

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  9. The number of moles of KMnO(4) reduced by 1 "mol of" KI in alkaline me...

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  10. Balance the following equation by oxidation number method: K(2)Cr(2)...

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  11. Which will be the value of x, y and z in the following equaton. xI(2...

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  12. The number of electrons involved in the conversion of MnO(4)^(-) to Mn...

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  13. The values of coefficients to balance the following reaction are Cr(...

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  14. The stoichiometric constants for the reaction pCu+qHNO(3) rarr rCu(NO...

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  15. What is the correct representation of reaction occurring when HCl is h...

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  16. When KMnO(4) is reduced with oxalic acid in acidic solution, the oxida...

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  17. When a manganous salt is fused with a mixture of KNO(3) and solid NaO...

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  18. For decolourisation of 1 "mol of" KMnO(4), the moles of H(2)O(2) requi...

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  19. The number of moles of K(2)Cr(2)O(7) reduced by 1 mol of Sn^(2+) ions ...

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  20. Which of the following colour changes shown during redox titrations is...

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