Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A :3.1500g of hydrated oxalic acid dissolved in water to make 250.0 mL solution will result in 0.1 M oxalic acid solution.
Reason R: Molar mass of hydrated oxalic acid is 126g
In the light of the above statements, choose the correct answer from the options given below.

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if (A) is true but (R) is false

if both (A) and (R) are correct and (R) is correct explanation of (A).

if both (A) and (R) are false

if both (A) and (R) are correct but (R) is not the correct explanation of (A).

answer is B.

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Detailed Solution

$\begin{array}{l} H_{2} C_{2} O_{4} \cdot 2 H_{2} O (Molecular weight = 126) \\ M = \frac{wt}{mol . wt} \times \frac{1000}{volume (ml)} \\ M = \frac{3.15}{126} \times \frac{1000}{250} = 0.1 . \end{array}$

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