Which aqueous solution has minimum freezing point?

0.01 M N a C l

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0.005 M C_{2} H_{5} O H

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0.005 M M g I_{2}

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0.005 M M g S O_{4}

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Solution

The correct option is A $0.01 M N a C l$
As we know,

$Δ T f = K_{f} . m . i$
$T_{f} \propto i$

more are ions, more will be $Δ T_{f}$ and
more is $Δ T_{f}$ ,lesser is freezing point.
The minimum freezing point means more is the number of ions

a. $0.01 \times 2 = 0.02$
b. $0.005 \times 1 = 0.005$
c. $0.005 \times 3 = 0.015$
d. $0.005 \times 2 = 0.01$
Hence, the correct option is $A$

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Similar questions

Which of the following aqueous solution has maximum freezing point

.01 M nacl

.05 M c2h5oh

.005 M mgi2

.01 M mgso4

C_{2} H_{5} O H

K_{f H_{2} O} = 1.86 K m^{- 1}

- {0.52}^{o} C .

K_{f} = {1.86}^{0} C / m

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