\( 50 \mathrm{~g} \) ice at \( 0^{\circ} \mathrm{C} \) is dropped i...

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\( 50 \mathrm{~g} \) ice at \( 0^{\circ} \mathrm{C} \) is dropped into a calorimeter
\( \mathrm{P} \) containing \( 100 \mathrm{~g} \) water at \( 30^{\circ} \mathrm{C} \). If thermal capacity

W of calorimeter is zero then amount of ice left in the mixture at equilibrium is
(1) \( 12.5 \mathrm{~g} \)
(2) \( 25 \mathrm{~g} \)
(3) \( 20 g \)
(4) \( 10 \mathrm{~g} \)
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