The property/properties that must be possessed by a material to be chosen for making heating elements of heating devices is/are: (i) high melting point (ii) high resistivity (iii) low resistance

Explanation

Properties Required 1. High Melting Point: The material must have a high melting point to withstand high temperatures without melting or deforming. This ensures that the heating element remains intact during operation. 2. High Resistivity: High resistivity is important because it allows the material to generate more heat when an electric current passes through it. Higher resistivity means the material will resist the flow of electricity more, causing more heat to be produced, which is desirable for heating elements. 3. Low Resistance: Low resistance is not a desirable property for heating elements. Low resistance would result in less heat generation, which is inefficient for heating devices. Instead, a material with higher resistance (or resistivity) is preferred to generate adequate heat. Conclusion The properties that must be possessed by a material to be chosen for making heating elements of heating devices are: (i) High melting point (ii) High resistivity Final Answer The correct properties are (i) high melting point and (ii) high resistivity.