Question
The correct order of decreasing electronegativity values among the elements (i) - beryllium, (ii) - oxygen, (iii) - nitrogen and (iv) - magnesium is
A.
(ii) > (iii) > (i) > (iv)
B.
(iii) > (iv) > (ii) > (i)
C.
(i) > (ii) > (iii) > (iv)
D.
(i) > (ii) > (iv) > (iii)
Answer :
(ii) > (iii) > (i) > (iv)
Solution :
Electronegativity values of given elements are as follows :
$$\eqalign{
& Be - 1.5\left( {\text{i}} \right)\,\,\,\,\,\,\,\,\,\,\,\,Mg - 1.2\left( {{\text{iv}}} \right) \cr
& O - 3.5\left( {{\text{ii}}} \right)\,\,\,\,\,\,\,\,\,\,\,\,N - 3.0\left( {{\text{iii}}} \right) \cr
& {\text{i}}{\text{.e}}{\text{.}}\,\,\left( {{\text{ii}}} \right){\text{ > }}\left( {{\text{iii}}} \right){\text{ > }}\left( {\text{i}} \right){\text{ > }}\left( {{\text{iv}}} \right) \cr} $$