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(a)At point A the substance is a gaining kinetic energy making it to vibrate vigorous up B.
At point B to C the kinetic energy gained is used to break down the particle in solid state.
At this point the substance starts melting and the temperature is constant.
(b) It is not water because the melting of water is 1000c not 1150c.
(c) The melting point will be lower because of the impurity Nacl.
(d) The temperature is constant.
maurice.mutuku answered the question on October 16, 2019 at 11:01
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