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Which of the following solution gives precipitate with $Pb(NO_3)_2$ but not with $Ba(NO_3)_2$ ?

(a) Sodium chloride
(b) Sodium sulphate
(c) Sodium nitrate
(d) Sodium hydrogen
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  • Since, $Na^+$ is more reactive than $Ba^{2+}$. So, $Ba^{2+}$ cannot displace $Cl^-$ from NaCl.
Answer: Sodium chloride
$Pb(NO_3)_2 + 2NaCl \rightarrow PbCl_2 \downarrow $ (white ppt.) $ + 2NaNO_3$
$Ba(NO_3)_2 + NaCl \rightarrow$ No reaction
answered Feb 1, 2014 by mosymeow_1

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