Q.
Considering greater polarization in LiCl compared to that in NaCl, which of the statements you would expect to be wrong?
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a
LiCl has lower melting point than NaCl
b
LiCl dissolves more in organic solvents
c
LiCl will ionize in water more than NaCl
d
Fused LiCl would be less conducting than fused NaCl
answer is C.
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Detailed Solution
As the size of cation increases polarising power the cation decreases and hence covalent character decreases & hence ionic character increases i.e., solubility in non polar solvents (or) organic solvents decreases & solubility in polar solvents increases.So, LiCl having more covalent nature and hence it is highly soluble in organic solvents, where as NaCl has has greater ionic character, therefore NaCl is highly soluble in polar solvents like H2O [inorganic solvent]→ Melting point ; LiCl < NaClNaCl is ionic where as LiCl covalent. Ionic compounds possess high melting and boiling pointsHint : polarising power of cation decreases covalent character decreases, solubility in organic solvents decreases & solubility in water [inorganic solvent] increases Conductivity in fused state LiCl
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