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ICSE Class 10 Physics 2020 Paper

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The diagram below shows the change of phases of a substance on a temperature vs time graph on heating the substance at a constant rate.
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Question : 58 of 67
Marks: +1, -0
What is the boiling and melting point of the substance?
Solution:  
Boiling point of the substance is t2∘Ct_2^{\circ}\mathrm{C}.
Melting point of the substance is t1∘Ct_1^{\circ}\mathrm{C}
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