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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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A copper ball of mass 100 g is at a temperature TT. It is dropped in a copper calorimeter of mass 100 g, filled with 170 g of water at room temperature. Subsequently, the temperature of the system is found to be 75∘C75^\circ C. TT is (Given, room temperature =30∘C= 30^\circ C, specific heat of copper =0.1 cal/g∘C= 0.1\,\mathrm{cal/g}^\circ C)
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Correct option: A
885∘C885^\circ C
Option A (885∘C885^\circ C) is correct because it is the temperature calculated using the principle of calorimetry, equating heat lost by the copper ball to heat gained by the water and calorimeter.

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