Question: 53: 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 :
(1) (a) – (i), (b) – (iii), (c) – (iv), (d) – (ii)
(2) (a) – (ii), (b) – (iii), (c) – (i), (d) – (iv)
(3) (a) – (iv), (b) – (i), (c) – (iii), (d) – (ii)
(4) (a) – (iii), (b) – (iv), (c) – (ii), (d) – (i)
Answer: Option (2)
Explanation:
Lithium is widely used in electrochemical cells due to its high electrode potential and light weight,
so Li matches with electrochemical cells.
Sodium is used as a coolant in fast breeder nuclear reactors because it has high thermal conductivity and does not react with structural materials at high temperatures.
Potassium hydroxide readily absorbs carbon dioxide forming potassium carbonate,
hence it is used as an absorbent for carbon dioxide.
Cesium has a very low ionisation energy and readily emits electrons when exposed to light,
making it suitable for use in photoelectric cells.
Thus, the correct matching is (a)–(ii), (b)–(iii), (c)–(i), and (d)–(iv).