A) \[0.189\,\,mol\,\,d{{m}^{-3}}\]
B) \[0.278\,\,mol\,\,d{{m}^{-3}}\]
C) \[0.556\,\,mol\,\,d{{m}^{-3}}\]
D) \[0.027\,\,mol\,\,d{{m}^{-3}}\]
Correct Answer: B
Solution :
Molarity of the solution, if \[w\] gram of the solute is present in V mL of the solution \[M=\frac{w}{Molar\,\,mass\,\,of\,\,solute}\times \frac{1000}{V}\] \[=\frac{5}{40}\times \frac{1000}{450}\] \[=0.278\,\,mol\,\,{{L}^{-1}}\] \[=0.278\,\,mol\,\,d{{m}^{-3}}\]
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