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Why is Cr^(2+) reducing and Mn^(3+) oxid...

Why is `Cr^(2+)` reducing and `Mn^(3+)` oxidizing even though both have the same `d^(4)` electronic configuration.

A

Both A & R are true, R is the correct explanation of A

B

Both A & R are true, R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-COMPLEX COMPOUNDS -OBJECTIVE EXERCISE -1 (APPLICATIONS)
  1. (A) : Structure of [Co(NH(3))(6)]^(+3) ion is octahedral (R) : The c...

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  2. (A) : IUPAC name of [Co(H(2)O)(4)Cl(2)]Cl.2H(2)O is tetraaquadichloroc...

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  3. (A) : [Co(2)(OH)(3)(NH(3))(6)]Cl(3) is an example of polynuclear compl...

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  4. (A): IUPAC name of [Pt Br (en) Cl, is dibromobis (1, 2-ethane diamine)...

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  5. (A): Chlorophyll contains one magnesium atom (R): Chlorophyll is use...

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  6. Why is Cr^(2+) reducing and Mn^(3+) oxidizing even though both have th...

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  7. (A): One mole of CrCl3. 5NH3 in aqueous solutions can give two moles o...

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  8. (A) : CoCl3 . 3NH3 does not ionise in aqua solution. (R ): CoCl3 . ...

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  9. (A): A cis-isomer has a net dipole moment zero. (R): A cis-isomers h...

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  10. Assertion:Co-ordination compounds are generally formed by transition m...

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  11. (A) : Aqueous solution of Mohr's salt exhibits the test for NH4^(+), F...

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  12. (A): Complexes containing ambidentate ligands exhibit co-ordination is...

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  13. (A): Metalcarbonyls can be called organometallics. (R): Metal carbon...

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  14. Assertion: The complex [Co(NH3)3Cl3] gives no precipitate with AgNO3 s...

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  15. Assertion: [Cu(CN)4]^(2-) is more stable than [Cu(H2O)4]^(2+) Reason...

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  16. (A): Chelates are relatively more stable than non-chelated complexes. ...

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  17. (A): [Fe(edta)] complex is octahedral in shape (R): edta ligand is ...

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  18. Assertion:Ni(CO)4 complex is tetrahedral in shape Reason: Ni atom u...

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  19. (A): All square planar complexes can exhibit geometrical isomerism (...

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  20. (A): Ethylenediaminetetraacetate ion forms a 1:1 stoichiometric comple...

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