Seema Saini Solutions for Chapter: Periodic Classification of Elements and General Inorganic Chemistry, Exercise 3: DPP

($A$) ${\mathrm{M}}^{-}\left(\mathrm{g}\right)\to \mathrm{M}\left(\mathrm{g}\right)$

($B$) $\mathrm{M}\left(\mathrm{g}\right)\to {\mathrm{M}}^{+}\left(\mathrm{g}\right)$

($C$) ${\mathrm{M}}^{+}\left(\mathrm{g}\right)\to {\mathrm{M}}^{2+}\left(\mathrm{g}\right)$

($D$) ${\mathrm{M}}^{2+}\left(\mathrm{g}\right)\to {\mathrm{M}}^{3+}\left(\mathrm{g}\right)$

The minimum and maximum $\mathrm{I}.\mathrm{P}.$ would be of:

Consider the following ionisation steps:

$\mathrm{X}\left(\mathrm{g}\right)⟶{\mathrm{X}}^{+}\left(\mathrm{g}\right)+{\mathrm{e}}^{-}; \mathrm{\Delta H}=100 \mathrm{unit}$

$\mathrm{X}\left(\mathrm{g}\right)⟶{\mathrm{X}}^{2+}\left(\mathrm{g}\right)+2{\mathrm{e}}^{-}; \mathrm{\Delta H}=250 \mathrm{unit}$

Select the correct statement(s).

Which of the following statements is/are correct?

Which is the correct increasing order of the $1^{\mathrm{st}}$ ionisation energy?

The ${\mathrm{IE}}_1$ of ${\mathrm{I}}^{\mathrm{st}}$ series of transition elements are as given:

From the above data, which of the following is not true?

The ${\mathrm{IE}}_1$ of ${\mathrm{I}}^{\mathrm{st}}$ series of transition elements are as given:

In general transition elements reacts:

$1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}^6,3{\mathrm{s}}^2,3{\mathrm{p}}^6,3{\mathrm{d}}^{\mathrm{n}},4{\mathrm{s}}^2\to 1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}^6,3{\mathrm{p}}^6,3{\mathrm{d}}^{\mathrm{n}}$

How do you explain the ionisation of transition elements?

The $I{E}_1$ of ${\mathrm{I}}^{\mathrm{st}}$ series of transition elements are as given:

In general transition element reacts

$1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{\mathrm{n}}4{\mathrm{s}}^2⟶1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{p}}^{6}3{\mathrm{d}}^{\mathrm{n}}$

As per Aufbau principle $4s$ energy level is lower than $3d$ energy level, so why would the $4s$ electrons be lost before the $3d$ electrons?

The ionisation energies are expected to increase from the left to right across the period for the transition elements. The most likely explanation for the discrepancies observed in the table is:

The $I{E}_1$ of ${\mathrm{I}}^{\mathrm{st}}$ series of transition elements are as given:

In general transition element reacts

$1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{\mathrm{n}}4{\mathrm{s}}^2⟶1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{p}}^{6}3{\mathrm{d}}^{\mathrm{n}}$

As per Aufbau principle $4s$ energy level is lower than $3d$ energy level, so why would the $4s$ electrons be lost before the $3d$ electrons?