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Question

Water and turpentine oil (specific heat less than that of water) are both heated to same temperature. Equal amounts of both are then placed in identical calorimeters and then left in air :
640185_f22df5311a6043f6b736a9b165f4ab85.png

A
A and B will represent cooling curves of water and oil respectively
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B
B and A will represent cooling curves of water and oil respectively
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C
Their cooling curves will be identical
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D
None of the above
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Solution

The correct option is C A and B will represent cooling curves of water and oil respectively
We know that,
Rate of cooling 1C(specific heat)
Since Coil<Cwater (given)
Rate of cooling of water < Rate of cooling of oil.
It is clear that at a particular time after starting of cooling, temperature of oil will be less than that of water.
So, graph A represents the cooling curve of water and graph B represents the cooling curve of oil.
682280_640185_ans_6f6262eb6e0246e79dbc9cc7e0b851a6.png

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