Transition Temperature of Rhombic Sulphur to Monoclinic Sulphur

The transition temperature of rhombic sulfur to monoclinic sulfur is the temperature at which the transition from rhombic sulfur to monoclinic sulfur occurs. This transition temperature is affected by various factors such as pressure, impurities, and the crystal structure of sulfur.

Factors Affecting the Transition Temperature

Pressure: The transition temperature decreases with increasing pressure. At a pressure of 100 atm, the transition temperature is about 95°C.

Impurities: The presence of impurities in sulfur can lower the transition temperature. For example, adding selenium to sulfur can lower the transition temperature by about 20°C.

Crystal Structure: The crystal structure of sulfur can also affect the transition temperature. For example, the transition temperature of sulfur with an orthorhombic crystal structure is lower than that of sulfur with a monoclinic crystal structure.

Answer

The correct answer is option 'D', which is 96°C. This is because the transition temperature of pure sulfur from rhombic to monoclinic form is 96°C. However, it is important to note that the transition temperature can vary depending on the factors mentioned above.