S Block Elements Question 8
Question 8 - 29 January - Shift 1
The correct order of hydration enthalpies is
(A) $K^{+}$
(B) $Rb^{+}$
(C) $Mg^{2+}$
(D) $Cs^{+}$
(E) $Ca^{2+}$
Choose the correct answer from the options given below:
(1) C $>$ A $>$ E $>$ B $>$ D
(2) $E>C>A>B>D$
(3) C $>$ E $>$ A $>$ D $>$ B
(4) $C>E>A>B>D$
Show Answer
Answer: (4)
Solution:
Formula: Hydration enthalpy of alkali and alkaline earth metals
Hydration enthalpies:
(i) $K^{+}>Rb^{+}>Cs^{+}$: (A) $>$(B) $>$(D)
(ii) $Mg^{+2}>Ca^{+2}:(C)>$ (E)
Option (D)
(C) $>$ (E) $>($ A $)>($ B $)>($ D $)$
