The correct order of decreasing electronegatıvity values among the elements I-beryllium, II-oxygen,…

The correct order of decreasing electronegatıvity values among the elements I-beryllium, II-oxygen, III-nitrogen and IV-magnesium is
  1. II $>\mathrm{III}>\mathrm{I}>\mathrm{IV}$
  2. $\mathrm{III}>\mathrm{IV}>\mathrm{II}>\mathrm{I}$
  3. $\mathrm{I}>\mathrm{II}>\mathrm{III}>\mathrm{IV}$
  4. $\quad \mathrm{I}>\mathrm{II}>\mathrm{IV}>\mathrm{III}$

Solution

Electronegativity values of given elements are as follows:
$\mathrm{Be}-1.5(\mathrm{I}) \quad \mathrm{Mg}-1.2(\mathrm{IV})$
$\begin{array}{ll}\mathrm{O}-3.5 \text { (II) } & \mathrm{N}-3.0 \text { (III) }\end{array}$
i.e. $\mathrm{II}>\mathrm{III}>\mathrm{I}>\mathrm{IV}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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