Published by:
CGP EDU Academic Team
Published on: August 11, 2026
Statement I: Boron does not exhibit allotropy
Statement II: Boron is extremely hard and black coloured solid
A
Both I & II are correct
B
Both I & II are not correct
C
is correct but II is not correct D
I is not correct but II is correct
Text Solution
Verified by ExpertsThe correct answer is:
D
Boron exists in crystalline and amorphous allotropes like 
- and 
- rhombohedral and 
-tetragonal allotrope. Thus, I is not correct. Boron is extremely hard and black-coloured solid and high-melting due to high crystal lattice enthalpy. Thus, II is correct.
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