AP EAMCET · Chemistry · p Block Elements (Group 13 & 14)
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 I is correct but II is not correct
- D I is not correct but II is correct
Answer & Solution
Correct Answer
(D) I is not correct but II is correct
Step-by-step Solution
Detailed explanation
Boron exists in crystalline and amorphous allotropes like \(\alpha\) - and \(\beta\)-rhombohedral and \(\beta\)-tetragonal allotrope. Thus, \(\mathrm{I}\) is not correct. Boron is extremely hard and black-coloured solid and high-melting due to high crystal lattice enthalpy.…
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