Question

Match the 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	III	Photoelectric cells
D	Si	IV	Bullet proof vest

Choose the most appropriate answer from the option given below:

• A. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
• B. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• C. (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
• D. (A)-(I), (B)-(IV), (C)-(II), (D)-(III)

Answer 1

Answer: (A)

Caesium is used in devising photoelectric cells.
Boron fibres are used in making bullet-proof vest.
Silicones being surrounded by non-polar alkyl groups are water repelling in nature.
Gallium is less toxic and has a very high boiling point, so it is used in high temperature thermometers.