Medium MCQ +4 / -1 PYQ · JEE Mains 2023

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

  1. A Both A and R are true but R is NOT the correct explanation of A
  2. B A is false but R is true
  3. C Both A and R are true and R is the correct explanation of A Correct answer
  4. D A is true but R is false

Solution

Due to bigger size of potassium, it forms more efficient lattices as compared to sodium with silicates.<br/><br/> The abundance of sodium in ocean is more due to the more soluble nature of salt of sodium as compared to potassium salts.

About this question

Subject: Chemistry · Chapter: s-Block Elements · Topic: Alkali Metals

This question is part of PrepWiser's free JEE Main question bank. 96 more solved questions on s-Block Elements are available — start with the harder ones if your accuracy is >70%.

Drill 25 more like these. Every day. Free.

PrepWiser turns these solved questions into a daily practice loop. Chapter-wise drills, full mocks, AI doubt chat. No auto-renew.

Start free →