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 . [2023]

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Q.
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, choose the correct answer from the options given below: [2023]

1 A is true but R is false

2 Both A and R are true and R is the correct explanation of A

3 A is false but R is true

4 Both A and R are true but R is not the correct explanation of A

Ans.
(2)

$Molarity (M) = \frac{wt}{M . wt} \times \frac{1000}{V (mL)}$

$= \frac{3.15}{126} \times \frac{1000}{250} = 0.1$

Reason is correct as it is used as a fact in the explanation of Assertion.

Solution

1 A is true but R is false

2 Both A and R are true and R is the correct explanation of A

3 A is false but R is true

4 Both A and R are true but R is not the correct explanation of A

Ans.
(2)

$Molarity (M) = \frac{wt}{M . wt} \times \frac{1000}{V (mL)}$

$= \frac{3.15}{126} \times \frac{1000}{250} = 0.1$

Reason is correct as it is used as a fact in the explanation of Assertion.

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Solution

1 A is true but R is false

2 Both A and R are true and R is the correct explanation of A

3 A is false but R is true

4 Both A and R are true but R is not the correct explanation of A

Ans. (2) Molarity (M)=wtM.wt×1000V(mL) =3.15126×1000250=0.1 Reason is correct as it is used as a fact in the explanation of Assertion.

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Ans.
(2)

$Molarity (M) = \frac{wt}{M . wt} \times \frac{1000}{V (mL)}$

$= \frac{3.15}{126} \times \frac{1000}{250} = 0.1$

Reason is correct as it is used as a fact in the explanation of Assertion.