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The conversion of K(2)Cr(2)O(7) into Cr(...

The conversion of `K_(2)Cr_(2)O_(7)` into `Cr_(2)(SO_(4))_(3)` is

A

Oxidation

B

Reduction

C

Decomposition

D

Substitution

Text Solution

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The correct Answer is:
B
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In the conversion of K_(2)Cr_(2)O_(7) to K_(2)CrO_(4) , the oxidation number of chromium.

When SO_(2) is passed through acidified K_(2)Cr_(2)O_(7) solution, Cr_(2)(SO_(4))_(3) is formed. The change in oxidation state of Cr is -

K_(2)Cr_(2)O_(7)+NaoH to CrO_(4)^(2-)

Oxidation number of Cr in K_(2)Cr_(2)O_(7),CrO_(5) and Cr_(2)(SO_(4))_(3) respectively is

A mixture of K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) forms

AAKASH INSTITUTE-REDOX REACTIONS-Assignment (Section A) (Objective type Questions (one option is correct))
  1. The reaction of H(2)S+H(2)O(2) rarr S+2H(2)O manifests

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  2. White P reacts with caustic soda, the products are PH(3) and NaH(2)PO(...

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  3. The conversion of K(2)Cr(2)O(7) into Cr(2)(SO(4))(3) is

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  4. In this reaction 2Na(2)S(2)O(3)+I(2) to Na(2)SO(4)O(6)+2NaI(2) ,NaI(2)...

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  5. The oxidation number of nitrogen in NH(2)OH is :

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

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  7. In which of the following reactions the underlined substance is oxidis...

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  8. The oxidation state of phosphorus vary from

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  9. In which of the following reactions, the underlined element has decrea...

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  10. A metal ion M^(3+) loses three electrons , its oxidation number will b...

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  11. In which one of the following changes there are transfer of five elect...

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  12. The oxidation states of the most electronegative elements in the produ...

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  13. The oxidation number of chlorine in HOCl is

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  14. In the reaction, Cl(2)+OH^(-)rarrCl^(-)+ClO(4)^(-1)+H(2)O, chlorine ...

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  15. The oxidation number of P in Mg(2)P(2)O(7) is

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  16. For the redox reaction, MnO(4)^(-) + C(2)O(4)^(2-) + H^(+) rarr Mn^(...

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  17. Oxygen has an oxidation state of +2 in

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  18. A compound contains three elements A,B and C, if the oxidation number ...

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  19. In which of the following pairs. the oxidation states, of sulphuric an...

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  20. The oxidation number of sulphur in S(8), S(2)F(2) and H(2)S respective...

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