JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
Given below are two statements: one is labelled as Assertion \(A\) and the other is labelled as Reason \(R.\) Assertion \(A:\) \(3.1500\,g\) 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 \(126\,g\,mol ^{-1}\). In the light of the above statements, chose the correct answer from the options given below:
- A Both \(A\) and \(R\) are true but \(R\) is NOT the correct explanation of \(A\).
- B \(A\) is false but \(R\) is true.
- C \(A\) is true but \(R\) is false.
- D Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\).
Answer & Solution
Correct Answer
(D) Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\).
Step-by-step Solution
Detailed explanation
Assertion is correct. \(H _2 C _2 O _4 \cdot 2 H _2 O\) \(M =\frac{3.15 \times 1000}{126 \times 250}\) \(\frac{12.6}{126}=0.1\) Reason is correct. It is used as a fact in explanation of assertion.
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