Question
Define: Fractional crystallization
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| Column $A$ | Column $B$ | ||
| $i.$ | Castner$-$Kellner cell | $a.$ | $Na_2CO$ |
| $ii.$ | Slaked lime | $b.$ | $CaCO_3$ |
| $iii.$ | Solvay process | $c.$ | $NaOH$ |
| $iv.$ | Limestone | $d.$ | $Ca(OH)_2$ |
| Molecule | Hybridization and bond angle | ||
| $i.$ | Water | $a.$ | $Sp^2, 120^\circ$ |
| $ii.$ | Boron trifluoride | $b.$ | $Sp^3, 104.5^\circ$ |
| $iii.$ | Beryllium fluoride | $c.$ | $Sp^3, 109.5^\circ$ |
| $iv.$ | Methane | $d.$ | $Sp, 180^\circ$ |