When some \( \mathrm{NaCl} \) was dissolved in water, the freezing point depression was numerica...

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When some \( \mathrm{NaCl} \) was dissolved in water, the freezing point depression was numerically equal to twice the molal f.p. depression constant. The relative lowering of vapour pressure of the solution is nearly :(a) \( 0.036 \)(b) \( 0.018 \)(c) \( 0.0585 \)(d) \( 0.072 \)
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