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03/10/2020 12:01 pm
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Which of the following substances has the least covalent character?
(a) Cl2O
(b) NCl3
(c) PbCl2
(d) BaCl2
1 Answer
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03/10/2020 12:07 pm
(d) BaCl2
Explanation:
According to Fajan's rule :
Covalent character ∝ 1/size of cation
∝ size of cation
Among the given species order of size of cations
N3+ < O2+ < Pb2+ < Ba2+
order of size of anions O2- > Cl-.
Hence the order of covalent character is
NCl3 > Cl2O > PbCl2 > BaCl2 >
BaCl2 is least covalent in nature.