Match List-I with List-II

| | List-I (Metal) | | List-II (Application) |
|---|---|---|---|
| (A) | Cs | (I) | High temperature thermometer |
| (B) | Ga | (II) | Water repellent sprays |
| (C) | B | (

Question

Match List-I with List-II

| | List-I (Metal) | | List-II (Application) |
|---|---|---|---|
| (A) | Cs | (I) | High temperature thermometer |
| (B) | Ga | (II) | Water repellent sprays |
| (C) | B | (IV) | Bullet proof vest |
| (D) | Si | (III) | Photoelectric cells |

Choose the most appropriate answer from the options given below:

Canvas Classes · Accepted Answer

- Cs (Caesium): Used in photoelectric cells due to its very low ionization energy (A-III)
- Ga (Gallium): Used in high temperature thermometers — Ga has a very wide liquid range (303 K to 2477 K) (B-I)
- B (Boron): Used in bullet proof vests — boron carbide () is extremely hard (C-IV)
- Si (Silicon): Used in water repellent sprays — silicones (organosilicon polymers) are water repellent (D-II)

Answer: Option (1) — (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

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