NEET2006Chemistryp Block Elements (Group 13 & 14)Actual
The incorrect statement among the following is
Options
- AC ₆₀ is an allotropic form of carbon
- BO ₃ is an allotropic form of oxygen
- CS ₈ is only allotropic form of sulphur
- Dred phosphorus is more stable in air than white phosphorus.
Correct answer
C. S ₈ is only allotropic form of sulphur
Step-by-step solution
The different allotropic forms of sulphur arises partly from the extent to which S has polymerised and partly from the crystal structures adopted. The two common crystalline forms are or rhombic sulphur and or monoclinic sulphur. A third modification is -monoclinic sulphur. All three forms contain puckered S₈ rings with a crown conformation. Engel's sulphur ( -sulphur) contains S₆ rings. S ₇, ~S ₉, ~S ₁₀, ~S ₁₁, ~S ₁₂, ~S ₁₈ and S ₂₀ rings have been made by Schmidt and his group. Plastic or -sulphur contains spiral