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Question:

Match the items in Column I with its main use listed in Column II:
Column I
Column II
A. Silica gel
i. Transistor
B. Silicon
ii. Ion-exchanger
C. Silicone
iii. Drying agent
D. Silicate
iv. Sealant

(A)-(ii),(B)-(iv),(C)-(i),(D)-(iii)

(A)-(iii),(B)-(i),(C)-(iv),(D)-(ii)

(A)-(ii),(B)-(i),(C)-(iv),(D)-(iii)

(A)-(iv),(B)-(i),(C)-(ii),(D)-(iii)

Solution:

A. Silica gel is a good dehydrating agent. It is used as a dehydrating agent. It is used to absorb moisture.
B. Silicon is used in transistors as it is a semiconductor.
C. Silicone is a good resistant to heat and water. So it used as sealant to seal some element.
D. Silicate including zeolites used in ion-exchange beds in domestic and commercial water purification, softening and other applications.