Question

Liquid oxygen and liquid nitrogen behave differently in a magnetic field. Match the picture below with the substance and indicate the correct summary of this behavior. This substance is Liquid Oxygen - O_2(I) Liquid Nitrogen - N_2(I) It is Diamagnetic Paramagnetic Ferromagnetic In a magnetic field it is Strongly attracted Attracted Slightly repelled It is Diamagnetic Paramagnetic Ferromagnetic In a magnetic field it is Strongly attracted Attracted Slightly repelled

Answer 1

On the basis of Molecular Orbital theory,

i) MO configuration in O₂(16 electron system)

: KK (σ2s)² (σ*2s)² (σ2Px)² (π2Py)² ( π2Pz)² ( π*2Py)¹ ( π*2Pz)¹

O₂ is having 2 unpaired electrons in its valence MO and hence O2 is Paramagnetic in nature,

Paramagnetic substances are attracted in magnetic field.

ii)MO configuration of N₂(14 electron system)

: KK (σ2s)² (σ*2s)² (σ2Px)² (π2Py)² ( π2Pz)²

N2 having all electrons paired and hence N2 is Diamagnetic in nature.

Diamagnetic substances are repelled in magnetic field.

On the basis of this, we have following results,

Picture-1)

a) This substance is A. Liquid Oxygen –O₂ (l)

b)It is D. Paramagnetic

c)In a magnetic field it is G. Attracted.

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Picture-2)

a) This substance is B. Liquid Nitrogen-N2 (l)

b)It is C. Diamagnetic.

c)In a magnetic field it is H. Slightly repelled.

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