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 |
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 |
Official answer: A
Silica gel is a drying agent, silicon is used in transistors, silicones are sealants, and silicates (zeolites) are ion exchangers.