Calculate the approximate $\Delta T_b$ (in $K$) for $0.001 \ m$ $KCl$ solution, if its van't-Hoff factor is $1.98$ [$K_b$ of water is $0.52 \ K \ kg \ mol^{-1}$].
- A$1.03$
- B$1.03 \times 10^{-3}$
- C$1.03 \times 10^{-5}$
- D$1.03 \times 10^{-1}$
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