The melting point of a substance is defined as the constant temperature at 1 atmospheric pressure at which _____________.
The solid starts melting.
both the solid and liquid exist together.
only the liquid is present.
the solid is completely changed into liquid.
A
the solid is completely changed into liquid.
B
The solid starts melting.
C
both the solid and liquid exist together.
D
only the liquid is present.
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Solution
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Melting point is the temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. The melting point of a solid is the temperature at which it changes state from solid to liquid at atmospheric pressure.
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