JEE Main20238 Apr 2023Evening ShiftChemistrys Block ElementsActual
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Sodium is about 30 times as abundant as potassium in the oceans. Reason R : Potassium is bigger in size than sodium. In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth A and R are true and R is the correct explanation of A
- BA is true but R is false
- CBoth A and R are true but R is NOT the correct explanation of A
- DBoth A and R are false
Correct answer
C. Both A and R are true but R is NOT the correct explanation of A
Step-by-step solution
Sodium is indeed about 30 times more abundant than potassium in seawater. This is because sodium is more soluble in water than potassium, and is therefore more readily dissolved from rocks and minerals into seawater. Potassium is bigger than sodium in size as atomic number of potassium is more than sodium and Potassium has one additional electron shell compared to sodium, which means that its atomic radius is larger. So Both A and R are true but R is NOT the correct explanation of A