Question

Two types of carbon-carbon covalent bond lengths are present in

• A. [B4O5(OH)4]2–
• B. [S2O8]2–
• C. CrO5
• D. HNO4

Answer 1

Answer: (C)

CrO5

Answer 2

diamond (1.54 Å)

graphite (1.42 Å) . (^r to the sheets there is no covalent bonding)

C60 (1.45 Å and 1.38 Å)

benzene (1.36 Å).