Question:

Match List I with List II :
List-I
Elements
List-II
Properties
(a)Li(i)Poor water solubility of \(\mathrm{I^-}\) 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 :

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Recall the anomalous behaviour of Li, the use of NaHCO3, the biological role of K and the solubility trend of iodides.
Updated On: Nov 4, 2026
  • (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  • (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
  • (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
  • (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
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The Correct Option is A

Solution and Explanation

(a) Li: lithium carbonate is the only alkali metal carbonate that decomposes easily on heating (\(\mathrm{Li_2CO_3 \to Li_2O + CO_2}\)) because of the small size of Li+. So (a)-(iv).
(b) Na: sodium bicarbonate (NaHCO3) is used in soda-acid fire extinguishers. So (b)-(iii).
(c) K: potassium is the most abundant cation (element) in cell fluid (intracellular), while Na is outside the cell. So (c)-(ii).
(d) Cs: the iodide of the large Cs+ ion is the least soluble among the alkali iodides, i.e. poor water solubility of the iodide salt. So (d)-(i).
Matching: (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i).
Answer: (1) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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