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Fe^(3+) is reduced to Fe^(2+) by using...

`Fe^(3+)` is reduced to `Fe^(2+)` by using

A

`H_(2)O_(2)` in presence of NaoH

B

`Na_(2)O_(2)` in water

C

`H_(2)O_(2)` in presence of `H_(2)SO_(4)`

D

`Na_(2)O_(2)` in presence of `H_(2)SO_(4)`.

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The correct Answer is:
C, D
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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 3
  1. Consider the following list of regents: Acidified K(2)Cr(2)O(7), alkal...

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  2. Which of the following statement are correct about Cr^(2+) (Z = 24) an...

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  3. Fe^(3+) is reduced to Fe^(2+) by using

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  4. In the following reaction sequence in aqueous solution, th species X, ...

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  5. Which of the following combination will produce H(2) gas ?

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  6. Number of electrons transferred in each case when KMnO(4) acts as an o...

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  7. Which of the following ions has the maximum magnetic moment in aqueous...

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  8. Most common oxidation state for Ce (Cerium) are:

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  9. What would happen when a solution of potassium chromate is treated wit...

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  10. Which one of the following nitrates will leaves behind a metal on stro...

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  11. The atomic number of Vanadium (V), Chromium (Cr), Magnaness (Mn) and I...

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  12. Which of the following group of transition metals is called coinage me...

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  13. The number of d-electrons retained in Fe^(2+) (At. No Fe=26) ions are:

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  14. Ammonia forms the complex [Cu(NH(3))(4)]^(2+) will copper ions in alka...

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  15. The radius of La^(3+)(Z=57) is 106 pm. Which one of the following give...

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  16. Cerium (Z = 58) is an important member of the lanthanoids. Which of th...

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  17. The lanthanide contraction is responsible for the fact that

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  18. Which of th following factor may be regarded as the main cause of Lant...

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  19. The spin-only magnetic moment [in units of Bohr magneton, (mu(B) of Ni...

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  20. Lanthanoid contraction is caused due to:

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