Which of the following elements show oxidation state of +3 only? (a)Boron (b)Gallium (c)Indium

It is given that: n(S) = 21, n(T) = 32, n(S ∩ T) = 11 We know that: n (S ∪ T) = n (S) + n (T) – n (S...

 (c) For nitrogen oxidation states from +1 to +4 disproportionate in acidic solution only. Oxidation state of phosphorous in P2O5 is + 5 whereas in P2O5 is +3 thus P2O5...

a) -3 & +3 b) +3 & +1 c) +3 & +1

+1 and +3 ,due to inert pair effect.

(a) Ge, Sn and Pb show divalency due to inert pair effect, Pb2+is more stable than Pb4+.  (b) Due to poor shielding effect of d-electrons in Ga, effective nuclear charge increases...

a) Aluminium

d) Boron of the Boron Family is a non-metal

(a) Covalent compounds only

(b)The boron atoms are linked through hydrogen atoms 

(c)Iron elements resembles boron the most.