Question
Answer the following.Distinguish between rhombic sulfur and monoclinic sulfur.
| Rhombic sulfur (α-sulfur) |
Monoclinic sulfur (β- sulfur) |
| 1. It is a pale yellow coloured solid. | 1. It is bright yellow solid |
| 2. It forms orthorhombic crystals | 2. It forms needle-shaped monoclinic crystals |
| 3. Its melting point is $385.8\ K.$ | 3. Its melting point is $393 K$. |
| 4. Its density is $2.06 g/cm^3$ | 4. Its density is $1.98 g/cm^3$ |
| 5. It is insoluble in water and soluble in $CS_2$ | 5. Soluble in $CS_2$ |
| 6. It is stable below $369 K$ and transforms to β-sulfur above this temperature | 6. It is stable above $369\ K$ and transforms into α-sulfur below this temperature. |
| 7. It is prepared by the evaporation of rolls sulfur in $CS_2$. | 7. It is prepared from rhombic sulfur. |
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