In $NF _{3}, SF _{4}, ClF _{3}$ central atom (i.e. $\left. N , S , Cl \right)$ having lone pair therefore act as lewis base.
In $PCl _{5}$ central atom $(P)$ does not have lone pair therefore does not act as lewis base.
(આપેલ : $pK _{ b }\left( NH _3\right)=4.74,NH _3$ નું મોલર દળ $=17\, g\, mol ^{-1},NH _4 Cl$નું મોલર દળ $= 53.5\, g\, mol ^{-1}$
સૂચી $-I$ (ધનઆયનો) | સૂચી $-II$(સમૂહ પ્રક્રિયકો) |
$P \rightarrow Pb ^{2+}, Cu ^{2+}$ | $(i)$ $H _2 S$ gas in presence of dilute $HCl$ |
$Q \rightarrow Al ^{3+}, Fe ^{3+}$ | $(ii)$ $\left( NH _4\right)_2 CO _3$ in presence of $NH _4 OH$ |
$R \rightarrow Co ^{2+}, Ni ^{2+}$ | $(iii)$ $NH _4 OH$ in presence of $NH _4 CI$ |
$S \rightarrow Ba ^{2+}, Ca ^{2+}$ | $(iv)$ $H _2 S$ in presence of $NH _4 OH$ |