Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 1: JEE Main - 1 February 2023 Shift 2

The first ionization enthalpies of $\mathrm{Be}, \mathrm{B}, \mathrm{N}$ and $\mathrm{O}$ follow the order

The first ionization enthalpy of $\mathrm{Na},\mathrm{Mg}$ and $\mathrm{Si}$, respectively, are: $496,737$ and $786 \mathrm{kJ}{\mathrm{mo}1}^{-1}$. The first ionization enthalpy $\left({\mathrm{kJmol}}^{-1}\right)$ of $\mathrm{Al}$ is

It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power 'n' i.e. ${\mathrm{v}}^{\mathrm{n}}$ of X-rays emitted is plotted against atomic number $\mathrm{Z}$, the following graph is obtained.

The value of 'n' is

Which of the following represents the correct order of metallic character of the given elements?

Total number of acidic oxides among ${\mathrm{N}}_2{\mathrm{O}}_3,{\mathrm{NO}}_2, {\mathrm{N}}_2\mathrm{O},{\mathrm{Cl}}_2{\mathrm{O}}_7,{\mathrm{SO}}_2,\mathrm{CO},\mathrm{CaO},{\mathrm{Na}}_2\mathrm{O}$ and $\mathrm{NO}$ is _____ .

Match List - I with List - II

Choose the correct answer from the options given below:

The correct increasing order of the ionic radii is

For electron gain enthalpies of the elements denoted as ${\Delta }_{\mathrm{eg}}\mathrm{H}$, the incorrect option is :