Question

Which of the following statements is/are wrong?

Accepted Answer

All isoelectronic ions belong to same period of the periodic table.

Answer

Van der Waal's radius of iodine is more than its covalent radius

Answer

I.E..$_1$ of $\mathrm{N}$ is higher than that of $\mathrm{O}$ while I.E. ${ }_2$ of $\mathrm{O}$ is higher than that of $\mathrm{N}$

Answer

The electron gain enthalpy of $\mathrm{N}$ is almost zero while that of $P$ is $74.3 \mathrm{~kJ} \mathrm{~mol}^{-1}$

JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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