Easy MCQ +4 / -1 PYQ · JEE Mains 2021

Match List I with List II :

List-I
Elements
List-II
Properties
(a) Li (i) Poor water solubility of ${I^ - }$ salt
(b) Na (ii) Most abundant element in cell fluid
(c) K (iii) Bicarbonate salt used in fire extinguisher
(d) Cs (iv) Carbonate salt decomposes easily on heating


Choose the correct answer from the options given below :

  1. A (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i) Correct answer
  2. B (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
  3. C (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
  4. D (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

Solution

(a) CsI salt is poor water soluble due to it's low hydration energy<br><br>(b) NaHCO<sub>3</sub> is used in fire extinguisher<br><br>(c) K is most abundant element in cell fluid<br><br>(d) Li<sub>2</sub>CO<sub>3</sub> decomposes easily due to high covalent character caused by small size Li<sup>+</sup> cation.

About this question

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

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