NEETChemistrySome Basic Concepts of Chemistry
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 m L solution will result in 0 . 1 M oxalic acid solution. Reason R : Molar mass of hydrated oxalic acid is 126 g m o l – 1 . In the light of the above statements, choose the correct answer from the options given below:
Options
- ABoth A and R are true but R is NOT the correct explanation of A
- BA is true but R is false
- CBoth A and R are true and R is the correct explanation of A
- DA is false but R is true
Correct answer
C. Both A and R are true and R is the correct explanation of A
Step-by-step solution
Molarity ( M ) = wt mwt × V × 1000 Using this formula, we can calculate the molarity of the oxalic acid solution as follows: Mass of hydrated oxalic acid = 3 . 1500 g Molar mass of hydrated oxalic acid ( H 2 C 2 O 4 · 2 H 2 O ) = 126 . 064 g / mol Volume of the solution = 250 . 0 mL Molarity ( M ) = 3 . 15 × 1000 126 × 250 = 0 . 10 So both assertion land reason are correct.