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anyone tell me why melting points of any substance decrease when we add any other material
Impurities decrease melting points because they interrupt the regular pattern of molecules or atoms in a substance. This makes it more difficult for the substance to overcome the intermolecular forces holding it together, resulting in a lower melting point.
Impurities disrupt the melting process by creating defects in the crystal lattice of the substance. These defects make it easier for the substance to break apart and melt at a lower temperature.
Yes, any type of impurity can decrease melting points. This includes foreign substances, as well as structural defects within the substance itself.
There is no specific limit to how much impurity can decrease a melting point. The amount of decrease depends on the type and amount of impurity present, as well as the properties of the substance itself.
Impurities affect the melting points of different substances in different ways. In some cases, impurities may increase the melting point, while in others they may have no effect or decrease the melting point. It depends on the specific properties and interactions between the impurity and the substance.