5.85g NaCl is dissolved in 500ml of water. The molarity of the solution is:

0.1

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0.2

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0.3

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0.4

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Solution

The correct option is A $0.2$
$M o l a r i t y = \frac{W e i g h t}{M . w t} \times \frac{1000}{V (m l)}$
$= \frac{5.85}{58. 5} \times \frac{1000}{500}$
$\Rightarrow M o l a r i t y = 0 \cdot 2 M$

Hence, the correct option is $B$

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