JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Which of the following are correct order of the enthalpy of hydration of

\mathrm{Ca}^{+2}, \mathrm{Mn}^{+2}

and

\mathrm{Zn}^+2

View answer and explanation

Correct option: D

\mathrm{Zn}^{+2}>\mathrm{Mn}^{+2}>\mathrm{Ca}^{+2}

Option D is correct because the enthalpy of hydration is related to charge density, and Zn+2 has a higher charge density than Mn+2 and Ca+2, leading to greater hydration enthalpy.

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Eu, Cm, Er, Tb, Yb and Lu Statement-I:

{Sm}^{3+}

{Dy}^{3+}

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\mathrm{Ti}{\mathrm{O}_2}

and

\mathrm{BaS}{\mathrm{O}_4}

is called