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Q.

The molality of 2% (W/W) NaCl solution nearly

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a

0.02 m

b

0.35 m

c

0.25 m

d

0.45 m

answer is B.

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Detailed Solution

2% (W/W) NaCl solution means,

W_s= 2gm , W_o = 100-2=98 gm

$m = \frac{W_{s}}{M_{s}} \times \frac{1000}{W_{o}} = \frac{2}{58.5} \times \frac{1000}{98} = 0.35 m$

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