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The s-block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe s-block Elements1 Mark
MCQ
The aqueous solutions of lithium salts are poor conductors of electricity as compared to that of other alkali metals because of:
  • A
    High ionization energy
  • B
    High electronegativity
  • C
    Lower ability of $\mathrm{Li}^{+}$ ions to polarize water molecules
  • ✓
    Higher degree of hydration of $\mathrm{Li}^{+}$ ions
✓

Answer

Correct option: D.
Higher degree of hydration of $\mathrm{Li}^{+}$ ions
The aqueous solutions of lithium salts are poor conductors of electricity as compared to that of other alkali metals because of higher degree of hydration of $\mathrm{Li}^{+}$ ions.
It decreases the mobility and leads to low conductivity.

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