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Amongest the bivalent ions of 3d-element...

Amongest the bivalent ions of 3d-elements, Mn(II) shows maximum paramagnetic character, Substantiate.

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Hint : `mu=5.9BM`
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The substances which contain species with unpaired electrons in their orbitals behave as paramagnetic substances. Such substances are weakly attracted by the magnetic field. The paramagnetism is expressed in terms of magnetic moment. The magnetic moment is related to the number of unpaired electrons according to the following relation : Magnetic moment, mu = sqrt(n(n+2)) B.M. Where .n. = number of unpaired electrons. B.M. stands for Bohr magneton, a unit of magnetic moment. An ion of a d-block elements has magnetic moment 5.92 B.M. Select the ion among the following.

AAKASH SERIES-ELEMENTS OF D - BLOCK-EXERCISE - 5.2
  1. Mn^(x+) has a magnetic moment of 4.9 BM. Calculate the value of x in t...

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  2. A salt of 3d metal gave a white precipitate with NH(4)OH, but dissolve...

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  3. What is the percentage of number of ferro ions in the non-stoichiometr...

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  4. Addition of appreciable amount KMnO(4) in conc. H(2)SO(4) explodes. Ex...

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  5. An aqueous solution of Al(2)(SO(4))(3),FeSO(4) and chrome alum is heat...

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  6. E^(@) for Mn^(3+), Mn^(2+) is more positive than that for Fe^(3+), Fe^...

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  7. Amongest the bivalent ions of 3d-elements, Mn(II) shows maximum parama...

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  8. Copper is regarded as transition metal, though it has completely fille...

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  9. Compounds of iron are coloured and paramagnetic. Explain.

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  10. In 3d-series which element cannot displace hydrogen gas from dilute ac...

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  11. Mn^(3+) is less stable than Mn^(2+) and Mn^(4+) ions. Why?

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  12. Acidified dichromate solution turns green when sodium sulphide is adde...

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  13. How lanthanides differ from actinides in their oxidation states?

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  14. Is any actinide has no electrons in 5f-subshell? If so name it.

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  15. What is actinoid contraction ?

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  16. Only chelate complexes of lanthanides are known, other complexes are l...

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  17. Basic nature of Lu(OH)(2) is less than that of La(OH)(3). Why?

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  18. Which lanthanide is synthetic? Write its electronic configuration.

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  19. Trivalent ions of Eu (Z = 63) and Tb (Z = 65) have same colours. Expla...

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  20. Eu^(2+) is good reductant, but Ce^(4+) is good oxidant. Explain.

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