Question

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Answer 1

Answer:

Boiling point is come from solid to liquid transition and freezing point is come from liquid to solid transition of a material. Generally, the freezing point is same as the boiling point. Thus, from the diagram, the substance B has freezing point or boiling point at 40

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C and the temperature range 60

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C to 160

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C at which the substances B and D can co-exit in liquid state.