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NEET2022Chemistrys Block ElementsActual

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:

Options

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

Correct answer

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

Step-by-step solution

(a) Li is used in many electrochemical cells (b) Liquid metallic sodium is used as coolant carrying heat from the core. (c) KOH is used to absorb CO 2 gas since KOH reacts CO 2 to form K 2 CO 3 (d) Cs is used in photoelectric cell because it has very low value of work function. During its exposure to direct sunlight, the electons that are there in Cs atom get stimulated and starts moving around.

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