1. Tardigrade
  2. Question
  3. Chemistry
  4. Statement I Boron always forms covalent bond. Statement II The small size of B3+ favours formation of covalent bond. (1) Statement I is correct Statement II is correct Statement II is the correct explanation of Statement I (2) Statement I is correct; Statement II is correct Statement II is not the correct explanation of Statement I (3) Statement I is correct: Statement II is incorrect (4) Statement I is incorrect; Statement II is correct

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Q. Statement I Boron always forms covalent bond.
Statement II The small size of $B^{3+}$ favours formation of covalent bond.
(1) Statement I is correct Statement II is correct Statement II is the correct explanation of Statement I
(2) Statement I is correct; Statement II is correct Statement II is not the correct explanation of Statement I
(3) Statement I is correct: Statement II is incorrect
(4) Statement I is incorrect; Statement II is correct

IIT JEEIIT JEE 2007The p-Block Elements

Solution:

Small size and high charge on $B ^{3+}$ makes it highly polarising. Therefore, in most of its compounds, boron forms covalent bonds.
Hence, both statement I and statement II are correct and statement II is a correct explanation of statement I.