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When sodium reacts with excess of oxygen...

When sodium reacts with excess of oxygen, oxidation number of oxygen changes from

A

0

B

`0 -1`

C

1

D

0-2

Text Solution

Verified by Experts

The correct Answer is:
B
`overset(+2)(Cu)SO_(4)+2 KI hArr K_(2)SO_(4)+CuI_(2)`
`2 CuI_(2) rarr overset(+1)(Cu)_(2)I_(2)+I_(2)`
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ERRORLESS -SOME BASIC CONCEPTS OF CHEMISTRY-Ordinary Thinking (Objective Questions) Oxidation number and Oxidation state
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  2. The oxidation number of Cr in K(2)Cr(2)O(7) is

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  3. When sodium reacts with excess of oxygen, oxidation number of oxygen c...

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  4. If HNO(3) changes into N(2)O, the oxidation number is changed by

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  5. What is the oxidation number of Co in [Co(NH(3))(4)ClNO(2)]?

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  6. The oxidation state of nitrogen is highest in

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  7. In which reaction there is a change in valency

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  8. When SO(2) is passed through acidic solution of potassium dichromate, ...

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  9. The oxidation state of M^(3+) after removing three elelctrons is

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  10. Oxidation number of iodine varies from -

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  11. Which one of the following has the highest oxidation number of iodine?

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  12. The charge on cobalt in [Co(CN)(6)]^(-3) is -

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  13. Oxidation state of oxygen inhydrogen peroxide is

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

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  15. The atomic number of an element which can not show the oxidation stat...

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  16. The oxidation number of S in Na(2)S(4)O(6) is

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  17. Oxidation number of N in (NH(4))(2)SO(4) is

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  18. The oxidation number of sulphur in H(2)SO(4),H(2)S(2)O(4) and H(2)S(2)...

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  19. Which of the following statement is correct

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  20. The oxidation number of carbon in CH(2)Cl(2) is

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