Match List - I with List - II:
List - I (Elements): (a) Li (b) Na (c) K (d) Cs
List - II (Properties): (i) Poor water solubility of I⁻ salt (ii) Most abundant element in cell fluid (iii) Bicarbonate salt used in fire extinguisher (iv) Carbonate salt decomposes easily on heating
Choose the correct answer from the options given below:
List - I (Elements): (a) Li (b) Na (c) K (d) Cs
List - II (Properties): (i) Poor water solubility of I⁻ salt (ii) Most abundant element in cell fluid (iii) Bicarbonate salt used in fire extinguisher (iv) Carbonate salt decomposes easily on heating
Choose the correct answer from the options given below:
- (A)(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
- (B)(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- (C)(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
- (D)(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)✓ Correct
Answer: (D)
Solution
Lithium carbonate is the one alkali-metal carbonate that decomposes on moderate heating, because the very small ion polarises the large carbonate ion strongly and pulls an oxide ion out of it. Sodium hydrogencarbonate is the charge of the soda-acid fire extinguisher, where acid liberates from it. Potassium is the cation present in the greatest amount in the fluid inside cells, sodium being the dominant one outside. Caesium iodide is the least soluble alkali-metal iodide, since two large ions of similar size pack into a lattice whose energy the small hydration energies cannot repay. The match is lithium with the easily decomposed carbonate, sodium with the fire-extinguisher bicarbonate, potassium with the cell-fluid cation and caesium with the poorly soluble iodide.
JEE Main · 2021 · 25 Jul 2021 · Shift 2 · Single correct option