Compounds like CO, NO etc,. do not follow third law of thermodynamics because

these substances are polar

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these substance do not form crystal at absolute zero temperature

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these substances do not fulfill the perfectly ordered arrangement at absolute zero.

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these substance follow the second law of thermodynamics.

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Solution

The correct option is C these substances do not fulfill the perfectly ordered arrangement at absolute zero.
CO, NO, etc., do not follow the third law of thermodynamics because, the entropy of these compounds at absolute zero, i.e 0 K is not zero.
This is because they do not form perfectly ordered crystals.

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According to third law of Thermodynamics, "At absolute zero, the entropy of a perfectly crystalline substance is taken as zero”.

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