The portion AB of the cooling curve represent | vedclass

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(B) In a cooling curve,the temperature decreases with time as heat is removed from the system.$1$. The segment $AB$ represents the cooling of a substa

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The liquid state of matter

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(B) In a cooling curve,the temperature decreases with time as heat is removed from the system.$1$. The segment $AB$ represents the cooling of a substance in a single phase,where the temperature drops as time passes.$2$. In this specific cooling curve,the segment $AB$ corresponds to the cooling of the substance while it is in the liquid state.$3$. The horizontal segment $BC$ represents a phase change (e.g.,liquid to solid) where the temperature remains constant.$4$. Therefore,the portion $AB$ represents the liquid state of matter.Thus,the correct option is $B$.

The portion $AB$ of the cooling curve representing the state of matter denotes:

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