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Which of the following contains unpaired...

Which of the following contains unpaired electrons ?

A

`NO_2`

B

`CO_2`

C

`NO_(2)^(-)`

D

`CN^(-)`

Text Solution

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The correct Answer is:
A
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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. 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-CHEMICAL BONDING-OBJECTIVE EXERCISE-3
  1. The following are some statements about the type of chemical bond pres...

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  2. Consider the following statements. The common features of the molecule...

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  3. Which of the following contains unpaired electrons ?

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  4. The formal charges on the three oxygen atoms in O3, molecule are

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  5. Which of the following when dissolved in water forms a solution which ...

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  6. i) The formation of a cation from a neutral atom is favoured by small ...

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  7. How many unit cells are present in a cube shaped ideal crystal of NaCl...

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  8. In the electronic structure of acetic acid there are

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  9. Octet rule is mostly violated in the compounds formed by

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  10. The following are some statements about hybridisation i) Pure orbitals...

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  11. The nodal plane in the -bond of ethene is located in

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  12. A square planar complex is formed by hybridisation of which of the fol...

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  13. Which of the following statements is incorrect for PCI5 ?

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  14. Using MO theory predict whcihof the following species has the shortest...

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  15. From the following given statements (i) O………………..H hydrogen bond len...

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  16. H-underset(H)underset(|)(H)overset((a))(……….)Hoverset((b))(-)underset(...

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  17. The high density of water compared to ice is due to

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  18. Which of the following hydroge halide is most volatile?

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  19. A stronger hydrogen bonding is present in

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  20. Organic compound soluble in water contains

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