freezing point drops by \( 0.5^{\circ} \mathrm{C} \). The dissociation constant of \( \mathrm{Cl...

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freezing point drops by \( 0.5^{\circ} \mathrm{C} \). The dissociation constant of \( \mathrm{ClCH}_{2} \mathrm{COOH} \) is \( x \times 10^{-3} \). The value of \( x \) is . (Rounded off to the nearest integer) \( \left[\mathrm{K}_{\mathrm{f}\left(\mathrm{H}_{2} \mathrm{O}\right)}=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right] \)
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