Question:

Match List-I with List-II.

 List - I List - II
(a)Li(i)Absorbent for carbon dioxide
(b)Na(ii)Electrochemical cells
(c)KOH(iii)Coolant in fast breeder reactors
(d)Cs(iv)Photoelectric cell

Choose the correct answer from the options given below:

Updated On: May 5, 2024
  • (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
  • (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  • (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
  • (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
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The Correct Option is D

Solution and Explanation

Li ⇒ electrochemical cells
Na ⇒ coolant in fast breeder reactors
KOH ⇒ absorbent for carbon dioxide
Cs ⇒ photoelectric cell
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Concepts Used:

Group 1 Elements

Group one of alkali metals is s-block elements with just one electron in their s-orbital. They are are alkali metals. They are named so because of the alkaline nature of the hydroxides and oxides.

Alkali metals are characterized by one s-electron in the valence shell of their atoms.

Alkali metals have a corresponding [Noble gas] ns1 electronic configuration. They occupy the first column of the periodic table. Alkali elements are:

  • Lithium(Li)
  • Sodium(Na)
  • Potassium (K)
  • Rubidium (Ru)
  • Cesium (Cs)
  • Francium (Fr)

They have occupied successive periods from first to seven. Francium is a radioactive element with very low half-life.

Electronic Configuration:

  • Alkali metals have one electron in their valence shell.
  • The electronic configuration is given by ns1. For example, the electronic configuration of lithium is given by 1ns1 2ns1.
  • They tend to lose the outer shell electron to form cations with charge +1 (monovalent ions).

This makes them the most electropositive elements and due to the same reason, they are not found in the pure state.