Elemetal carbon appears in many structural forms or allotropes. Three of these forms are crystalline - diamond, graphite and the recently discovered fullerene (bucky ball) - while more than 40 others including coke and carbon black are amorphous. Now there seems to be a fourth crystalline allotrope of carbon, reported in 1995 by Rich and Lagow at the University of Texas Structures of different allotropes of carbon have been compared. Which represents incorrect comparison ?

Elemetal carbon appears in many structural forms or allotropes. Three

1.	Elemetal carbon appears in many structural forms or allotropes. Three of these forms are crystalline - diamond, graphite and the recently discovered fullerene (bucky ball) - while more than 40 others including coke and carbon black are amorphous. Now there seems to be a fourth crystalline allotrope of carbon, reported in 1995 by Rich and Lagow at the University of Texas Structures of different allotropes of carbon have been compared. Which represents incorrect comparison ?
Answer» ALLOTROPE DISCOVERD in 1995 sp-hybridised carbon bucky BALL sp-hybridised carbon graphite `sp^(2)` - hybridised carbon diamond `sp^(3)` – hybridised carbon Solution :Bucky ball [FULLERENE] - sp hybridised carbon