Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 1: Level 1

Which of the following atoms should have the highest first electron affinity?

The element with positive electron gain enthalpy is

Which of the following species has the highest electron affinity?

The highest electron affinity is shown by

Electronic configuration of most electronegative element is

Among ${\mathrm{Me}}_3\mathrm{N}, {\mathrm{C}}_5{\mathrm{H}}_5\mathrm{N} \mathrm{and} \mathrm{MeCN}$ ($\mathrm{Me}$ = methyl group), the electronegativity of $\mathrm{N}$ is in the order

Among the elements $\mathrm{B}, \mathrm{Mg}, \mathrm{Al} \mathrm{and} \mathrm{K}$, the correct order of increasing metallic character is

Aqueous solutions of two compounds, $\mathrm{M}-\mathrm{O}-\mathrm{H}$and $\mathrm{M}\text{'}-\mathrm{O}-\mathrm{H}$ have been prepared in two separate beakers. If the electronegativity of $\mathrm{M}=3.5, \mathrm{M}\text{'}=1.72, \mathrm{O}=3.0$ and $\mathrm{H}=2.1$, then the solutions respectively are