Electronegativity of beryllium $(Be)$ is approximately equal to that of

The correct increasing order of the electronegativity is

In which molecule does the chlorine atom have a positive partial charge?

Which one of the following represents the correct order of electronegativity?

Which is the correct order of electronegativities?

Let electronegativity,ionisation energy and electron affinity be represented as $EN$,$IP$ and $EA$ respectively. Which one of the following equations is correct according to Mulliken?