13-GROUP ELEMENT

it is more ionic....if u c by fajans rule...since the anion is too small to be distorted by the strong positive charge of the cation.....

2...EXPLAIN--
*BF₃ HAS NO DIPOLE MOMENT BUT PF₃ HAS SUBSTANTIAL DIPOLE MOMENT

*BF₃ AND BrF₃ MOLECULES HAVE DIFFERENT SHAPES

and covalent character will increase in the order BeF₂<BeCL₂<BeBr₂

2.BeF₃ is sp2 hybridised n in same plane makin 120 degrees....so dipole moments calcel out...wheras PCl₃ has pyramidal structure so the net dipole moment is not zero as in one hybridised orital there is lone pair

3.HOW ORTHOBORIC ACID IONISES IN WATER.....WHICH WAY OF WRITING FORMULA IS BETTER......H₃BO₃ OR B(OH)₃

sumeet no offence but if u study NCERT u will get alll this answers....its given clearly in NCert

for 1.....BeF₂ → BIGGEST ELECTRONEGATIVITY DIFFERENCE FOR A COMPOUND OF Be AND SO MOST LIKELY IS IONIC.........
BUT IT HAS VERY LOW CONDUCTIVITY IN FUSED STATE AND IS REGARDED AS COVALENT

3......H₃BO₃ IS SOLUBLE IN WATER AND BEHAVES AS WEAK ACID.IT DOES NOT DONATE PROTONS LIKE MOST ACIDS BUT RATHER IT ACCEPTS OH^-..IT IS THEREFORE LEWIS ACID.AND IS BETTER WRITTEN AS B(OH)₃.......it ionises in water giving B(OH)4^- H⁺

organic that is B₂H₆ not Be F₂ mate!!

ok...dude :)..thnx for enriching mah knoledge...