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In which of the following reactions, the...

In which of the following reactions, the underlined element has decreased its oxidation number during the reaction?

A

`underset( -)(Fe)+CuSO_(4) rarrCu +FeSO_(4)`

B

`underset( -)(H_(2))+Cl_(2) rarr 2HCl`

C

`underset( -)(C) +H_(2)O rarr CO +H_(2)`

D

`underset( -)(Mn) O_(2) + 4HCl rarr MnCl_(2)+Cl_(2)+2H_(2)O`

Text Solution

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The correct Answer is:
D
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MOTION-OXIDATION & REDUCTION -OXIDATION NUMBER ( EXERCISE -1)
  1. Which of the following is not a redox change ?

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  2. Which of the following halogen always show only one oxidation state -

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

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  4. The compound in which oxidation state of metal is zero-

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  5. When potassium permanganate is added to acidulated solution of ferrous...

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  6. Which of the following examples does not represent disproportionation ...

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  7. In which of the following compounds, the oxidation state of I-atom is ...

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  8. Oxidation number of Ni in Ni(CO)(4) is-

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  9. H(2)O(2)+H(2)O(2)rarr2H(2)O+O(2) is an example of dispropotionation be...

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  10. In a reaction, H(2)O +C rarr CO +H(2)

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

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  12. If H(2)S gas is passed through a solution of K(2)Cr(2)O(7), the colour...

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  13. In the following reaction, 4P+3KOH+3H(2)O rarr 3KH(2)PO(2)+PH(3)

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  14. Oxygen has an oxidation state of +2 in

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  15. The oxidation number of chlorine in HOCl is

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  16. O.N. of hydrogen in KH, MgH(2) and NaH respectively would be -

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  17. In C+H(2)O rarr CO+H(2), H(2)O acts as

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  18. Identify oxidising & Reducing Agent - PbS+4H(2)O(2) rarr PbSO(4) + 4...

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  19. Equivalent weight of oxidising agent will be - 2H(2) + O(2) rarr 2H(...

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  20. Which one can act as oxidising & reducing agent both -

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