Which of the following statements are correct?
(A) Both LiCl and MgCl2 are soluble in ethanol
(B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide.
(C) LiF is less soluble in water than other alkali metal fluorides.
(D) Li2O is more soluble in water than other alkali metal oxides.
Choose the most appropriate answer from the options given below :
Which of the following statements are correct?
(A) Both LiCl and MgCl2 are soluble in ethanol
(B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide.
(C) LiF is less soluble in water than other alkali metal fluorides.
(D) Li2O is more soluble in water than other alkali metal oxides.
Choose the most appropriate answer from the options given below :
Option 1 -
(A) and (C) only
Option 2 -
(A), (C) and (D) only
Option 3 -
B) and (C) only
Option 4 -
(A) and (D) only
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1 Answer
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Correct Option - 1
Detailed Solution:Due to higher extent of polarization by Li+ and Mg2+, LiCl and Mgcl2 have covalent character. Therefore they are soluble in ethanol.
Due to very high value of lattice energy, LiF is having very less solubility in water.
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Li+ has the highest hydration enthalpy.
Hence it is most hydrated
Therefore, Correct order of hydrated radii is Cs+ < Rb+ < K+ < Na+ < Li+
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