5.0 g of sodium hydroxide (molar mass 40 g mol) is dissolved in little quantity of water and the solution is diluted upto 100 mL. What is the molarity of the resulting solution?

Options

A. `0.1" mol dm"^-3`
B. `1.0" mol dm"^-3`
C. `0.125" mol dm"^-3`
D. ` 1.25" mol dm"^-3`

Answer

D

Explanation

Given, `W ("mass of solute") = 5.0g`
m (molar mass of solute)= `40" g mol"^-1`
Volume 100 mL
Molarity is given as,
`M=("Moles of solute")/("Volume of solution in L")`
Acetyl chloride when treated with dibenzyl cadmium yields benzyl methyl ketone
Here, Ph=Phenyl group