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Latent Heat of Fusion

Ice cubes at ...

Question

Ice cubes at -15°C temperature are kept on a burner. Their temperature keeps on rising. After some time they start melting and their temperature becomes constant at _°C. This temperature is known as the ______ of water.

A

0°C, boiling point

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B

0°C, ice point

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C

100°C, ice point

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D

100°C, boiling point

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Solution

The correct option is B 0°C, ice point
Ice starts melting at a temperature of 0°C. This temperature is known as the melting point or ice point of water.

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Q. A student sets up an apparatus to determine the melting point of ice. He takes a beaker half filled with crushed ice and dips a mercury thermometer with an initial reading of room temperature (25ºC) in such a way that the bulb of the thermometer is surrounded by ice. The correct observation obtained by the student is that :
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