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Q. Maximum lowering of vapour pressure is observed in the case of

J & K CETJ & K CET 2008Solutions

Solution:

Lowering of vapour pressure is a colligative property ie, depends only upon the
number of particles of solute and not on the nature of solute.
$\because 0.1\, M$ glucose $\rightarrow$ remains undissociated
$0.1\, M\,BaCl _{2} \rightarrow Ba ^{2+}+2 Cl ^{-} \Rightarrow 3$ ions
$0.1\, M\, MgSO _{4} \rightarrow Mg ^{2+}+ SO _{4}^{2-} \Rightarrow 2$ ions
$0.1\, M\,BaCl _{2}$ gives maximum number of particles, hence it exhibits maximum lowering of vapour
pressure.