Q.

When a hot liquid is mixed with a cold liquid, the temperature of the mixture

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a

first increases then becomes constant

b

is un defined for some time and then becomes nearly constant

c

first decreases then becomes constant

d

continuously increases

answer is D.

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Detailed Solution

When a hot liquid is mixed with a cold liquid then heat exchange take place between molecules of hot liquid and molecules of cold liquid, they take certain time to get thermal equilibrium during this time the temperature of mixture will be in undefined state and finally it becomes constant.
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