Question

In a family, Ishita is the granddaughter of Ashima. Deepika is the mother of the Hannah. Chetan is
the son of Anil. Rohini is the mother of Ishita. Deepika is the sister of the Vivek and Chetan. Nilesh
has two children, Gauri and Hannah. Elesh is the only grandson in family. Chetan is not married.
Rohini is the daughter-in-law of Anil.
How many children does Deepika have?
O Three
O None of the above​

Answer 1

Answer:

Answer:

$\longmapsto \sf\boxed{\bold{\pink{Explain\: the\: following\: briefly\: :-}}}$

${\large{\bold{\purple{\underline{a)\: Inert\: pair\: effect\: :-}}}}}$

$\implies$ The elements of 4th , 5th and 6th period of the p-block elements which comes after d-block elements, the electrons present in the intervening d- or f- orbitals do not shield the s-electrons of the valence shield effectively. As a result, $\sf {ns}^{2}$ electrons remain more tightly held by the nucleus and hence do not participate in bonding. This is called inert pair effect.

$\rule{150}{2}$

${\large{\bold{\purple{\underline{b)\: Hydration\: enthalpy\: :-}}}}}$

$\implies$ It is the amount of energy released when one mole of gaseous ions combine with water to form hydrated ions. This is called hydration enthalpy.

$\rule{150}{2}$

${\large{\bold{\purple{\underline{c)\: Atomisation\: enthalpy\: :-}}}}}$

$\implies$ The enthalpy change accompanying the association of all the molecules in one mole of gas phrase substance into gaseous atoms is called atomisation enthalpy.

$\rule{150}{2}$

${\large{\bold{\purple{\underline{d)\: Lanthanide\: contraction\: :-}}}}}$

$\implies$ In a lanthanide, there is a regular decrease in the size of atoms and tripositive ions with increase in atomic number. This decrease of ionic and atomic radii in the lanthanide elements is called lanthanide contraction.

$\rule{150}{2}$

${\large{\bold{\purple{\underline{e)\: Actinide\: contraction\: :-}}}}}$

$\implies$ The steady decrease in atomic size of the actinides with increase in the atomic number. This is called actinides contracting.

$\rule{150}{2}$

EXTRA INFORMATION :-

$\diamondsuit$ Inert pair effect is prominent character is Pottasium (k) .

$\diamondsuit$ Hydration enthalpy of alkali metals decrease with increase in ionic size.