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In the complex [Ni(H2O)2 (NH3)4]^(2+) t...

In the complex `[Ni(H_2O)_2 (NH_3)_4]^(2+)` the number of unpaired electrons is

A

0

B

1

C

3

D

2

Text Solution

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The correct Answer is:
D
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Valence bond theory successfully explains the magnetic behaviour of complexes. The substances which contains unpaired electrons are paramagnetic and paramagnetic character increases as the number of unpaired electrons increases. Magnetic moment of a complex can be determined experimentally and by using formula sqrt(n(n+2)) and we can determine the number of unpaired electrons in it. This information is important in writing electronic structure of complex which in turn also useful in deciding the geometry of complex. There are four complexes of Ni. Select the complex/es which will be attracted by magnetic field. underset((I))([Ni(CN)_(4)]^(2-))" "underset((II))([NiCl_(4)]^(2-))" "underset((II))(Ni(CO)_(4))" "underset((IV))([Ni(H_(2)O)_(6)]^(2+))

Valence bond theory successfully explains the magnetic behaviour of complexes. The substances which contains unpaired electrons are paramagnetic and paramagnetic character increases as the number of unpaired electrons increases. Magnetic moment of a complex can be determined experimentally and by using formula sqrt(n(n+2)) and we can determine the number of unpaired electrons in it. This information is important in writing electronic structure of complex which in turn also useful in deciding the geometry of complex. Which of the following are diamagnetic ? 1) K_(4)[Fe(CN)_(6)] 2) K_(3)[Cr(CN)_(6)] 3) K_(3)[Co(CN)_(6)] 4) K_(2)[Ni(CN)_(4)]

Valence bond theory successfully explains the magnetic behaviour of complexes. The substances which contains unpaired electrons are paramagnetic and paramagnetic character increases as the number of unpaired electrons increases. Magnetic moment of a complex can be determined experimentally and by using formula sqrt(n(n+2)) and we can determine the number of unpaired electrons in it. This information is important in writing electronic structure of complex which in turn also useful in deciding the geometry of complex. The magnetic moment of complexes given below are in the order : {:(Ni(CO)_(4),[Mn(CN)_(6)]),("(I)","(II)"),([Cr(NH_(3))_(6)]^(3+),[CoF_(6)]^(3+)),("(I)","(II)"):}

AAKASH SERIES-REVISION EXERCISE -d-BLOCK ELEMENTS
  1. Which of the following is diamagnetic?

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  2. Which one of the following sets correctly represents the increase in t...

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  3. In the complex [Ni(H2O)2 (NH3)4]^(2+) the number of unpaired electron...

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  4. Heat of atomization of zinc is lowest among 3d block elements due to

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  5. The positive standard reduction potential of Cu^(+2)/ Cu electrode is ...

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  6. The observed and calculated E^0 values for M^(+2)/M are same for

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  7. When a large amount of KMnO4 is added to concentrated H2SO4, an explos...

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  8. Reaction of KMnO4 in neutral or very weakly acidic solution can be rep...

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  9. When KMnO4 is added to oxalic acid, the decolourisation is slow in the...

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  10. A solution of potassium chromate is treated with an excess of dilute n...

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  11. K2Cr2O7 cannot be used for

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  12. When acidified solution of potassium dichromate is shaken with aqueous...

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  13. The blue colour produced on adding hydrogen peroxide to acidified K2Cr...

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  14. Which of the following metals is known to form acidic oxide

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  15. In the dichromate dianion

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  16. The oxidation state of chromium in the final product formed by the rea...

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  17. Which of the following element has f electro nic configuration in its ...

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  18. The natures of the oxides CrO and CrO3, respectively

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  19. Acedified K2Cr2O7 cannot oxidise

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  20. The equilibrium Cr2O7^(2-) hArr 2CrO4^(2-)

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