First slide

Atomic and physical properties

Question

Statement I : The oxidation number of boron in BF₃ is +3
Statement II : Boron cannot form a cation

Moderate

A

Both the statements are true
B

Both the statements are false
C

I is false and II is true
D

I is true and II is false

Solution

$B{F_3}$
$x + 3\left( { - 1} \right) = 0$
$x = + 3$
$\therefore$ the oxidation state of B in BF₃ is +3.
→Boron can't form caion ,due to its small size and high sum of first three ionisation energies.Therefore it does not lose its three valency electrons and does not form B⁺³cation.

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