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Magnetic moment of Cr^(+2)(Z=24),Mn^(+2)...

Magnetic moment of `Cr^(+2)(Z=24),Mn^(+2)(Z=25)` and `Fe^(2+) (Z=26)` are x,y,z. they are in order

A

xltyltz

B

xgtygtz

C

zltx=y

D

x=zlty

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D
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Transition metals and many of their compounds show paramagnetic behaviour where there are unpaired electron or electrons. The magnetic moment arises from the spin and orbital motions in ions or molecule. Magnetic moment of n unpaired electrons is given as mu=sqrt(n(n+2)) Bohr magneton Magnetic moment increases as the number of unpaired electrons increases. Q. Magnetic moments of Cr(Z=24),Mn^(o+)(Z=35) and Fe^(2+)(Z=36) are x,y and z respectively. Which of the following order is correct?

Magnetic moment of V(Z = 23),Cr(Z = 24),and Mn(Z= 25) are x,y,z repectively hence

Magnetic moment of V(Z = 23),Cr(Z = 24),and Mn(Z= 25) are x,y,z respectively hence

If Hund's rule is not followed , magnetic moment of Fe^(2+) , Mn^(o+) and Cr all having 24 electron will be in order

Among V(Z=23) , Cr(Z=24) , Mn(Z=25) and Fe(Z=26) , which will have the highest magnetic moment?

Use the EAN rule to predict the molecular formula for the simple carbonyls of (a) Cr(Z = 24) (b) Fe (Z =26) and (c ) Ni (Z =28) (Assume that the oxidation state of the metals in the these carbonyls is zero) .

The E^(@) value in respect of the electrodes chromium (Z=24) , manganese (Z=25) and iron (Z=26) are : Cr^(3+)//Cr^(2+)=-0.4V,Mn^(3+)//Mn^(2+)=+1.5V , " " Fe^(3+)//Fe^(2)=+0.8V . On the basic of the above information compare the feasibilities of further oxidation of their +2 oxidation states.

The pair having the same magnetic moment is [at. No. Cr = 24, Mn = 25, Fe = 26 " and " Co = 27]

The pair having the same magnetic moment is [at. No. Cr = 24, Mn = 25, Fe = 26 " and " Co = 27]

If log(x+z)+log(x-2y+z)=2log(x-z)," then "x,y,z are in

RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. Which of the following has the maximum number of unpaired d-electron?

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  2. Highest magnetic moments, shown by the transition metal ion with the ...

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  3. Magnetic moment of Cr^(+2)(Z=24),Mn^(+2)(Z=25) and Fe^(2+) (Z=26) are ...

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  4. Spin only magnetic moment of .(25)Mn^(x+)ion is sqrt(15) B.M. Then, t...

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  5. Colour in transition metal compounds in attributed to

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  6. MnO(4)^(-) is of intense pink colour, though Mn is in (+7) oxidation s...

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  7. The yellow colour of chromates changes to orange on acidification due...

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  8. The catalytic activity of transition metals and their compounds is asc...

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  9. KMnO(4) is the oxo salt of :

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  10. The solubility of silver bromide in hypo solution (excess) is due to ...

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  11. In dilute alkaline solution,MnO(4)^(-) changes to:

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  12. Cl(2) gas is obtained by various reactions but not by:

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  13. The developer used in photography is an alkaline solution of:

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  14. When acidified solution of K(2)Cr(2)O(7) is shaken with aqeous solutio...

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  15. Which of the following compounds is used as the starting material for ...

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  16. CrO(4) dissolves in aqueous NaOH to give :

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  17. The final product obtained for the following reaction is: KMnO(4)("ex...

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  18. The f-block of the periodic table contains those elements in which:

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  19. Among the lanthanides the one obtained by synthetic method is (a)Lu ...

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  20. The most common lanthanoid is

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