Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsShort Answer Type

41.

Calculate the ratio of the rate of diffusion of oxygen to the rate of diffusion of hydrogen at constant temperature and pressure.


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42.

Why B2 is paramagnetic whereas C2 is dimagnetic?


For B2 (10e) the MO configuration is (σ1s)2 (σ*1s)2 (σ2s)2 (σ*2s)2 (π2px1 = π2py1)

Due to presence of unpaired electron π2px1 = π2py1 it shows paramagnetism.

C2(12e) the MO configuration is (σ1s)2 (σ*1s)2 (σ2s)2 (π2px2 = π2py2)

No unpaired electrons are there in C2 π2px2 = π2py2, hence it shows diamagnetism.


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43.

How nitrobenzene is identified using Mulliken-Barker test?


44.

Explain why aniline is not as basic as ammonia.


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45.

Explain briefly the cause of Lanthanoid contraction.


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