JEE Advanced2007Chemistryp Block Elements (Group 13 & 14)Actual
Statement I Boron always forms covalent bond Statement II The small size of B ³⁺ favours formation of covalent bond.
Options
- AStatement I is true, Statement II is true, Statement II is a correct explanation for Statement I
- BStatement I is true, Statement II is true, Statement II is not a correct explanation for Statement II
- CStatement I is true, Statement II is false
- DStatement I is false, Statement II is true
Correct answer
A. Statement I is true, Statement II is true, Statement II is a correct explanation for Statement I
Step-by-step solution
Boron always form covalent bond because boron requires very high energy to form B ³⁺ and again B ³⁺ due to its very small size having high polarising power thus cause greater polarisation and eventually significant covalent characteristics-Fajans rule.