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Topic: Modern periodic law and periodic table, s, p, d, f blocks· Classification of Elements and Periodicity in Properties

Match List - I with List - II.List - I: (a) Li (b) Na (c) KOH (d) CsList - II: (i) absorbent for carbon dioxide (ii) electrochemical cells (iii) coolant in fast breeder reactors (iv) photoelectric cellChoose the correct answer from the options given…

Match List - I with List - II.

List - I: (a) Li (b) Na (c) KOH (d) Cs

List - II: (i) absorbent for carbon dioxide (ii) electrochemical cells (iii) coolant in fast breeder reactors (iv) photoelectric cell

Choose the correct answer from the options given below :

1. (a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

2. (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)

3. (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

4. (a) - (i), (b) - (iii), (c) - (iv), (d) - (ii)

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Best answer

Answer: 1. (a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

Key idea: recall the uses of alkali metals and their compounds.

  • Li: electrochemical cells (light, high reduction potential), so (a)-(ii).
  • Na: liquid Na is the coolant in fast breeder reactors, so (b)-(iii).
  • KOH: absorbs \(\mathrm{CO_2}\), so (c)-(i).
  • Cs: photoelectric cells (low ionisation enthalpy), so (d)-(iv).

This is option 1.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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