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. $\left(A\right)-\left(iv\right),\left(B\right)-\left(i\right),\left(C\right)-\left(ii\right),\left(D\right)-\left(iii\right)$
• B. $\left(A\right)-\left(iii\right),\left(B\right)-\left(i\right),\left(C\right)-\left(iv\right),\left(D\right)-\left(ii\right)$
• C. $\left(A\right)-\left(ii\right),\left(B\right)-\left(i\right),\left(C\right)-\left(iv\right),\left(D\right)-\left(iii\right)$
• D. $\left(A\right)-\left(ii\right),\left(B\right)-\left(iv\right),\left(C\right)-\left(i\right),\left(D\right)-\left(iii\right)$

Answer 1

Answer: (B)

$\left(A\right)-\left(iii\right),\left(B\right)-\left(i\right),\left(C\right)-\left(iv\right),\left(D\right)-\left(ii\right)$

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. Silicon 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.