Question

Mica is an example of?
(A) Chain Silicate
(B) Pyro Silicate
(C) Sheet Silicate
(D) Cyclic Silicate

Answer 1

Hint : We know that the he mica material is a non-metal and therefore it doesn’t have any free electrons on the surface of the earth and hence the electrical conduction of mica is none. Mica is a material which is stable in extreme temperature conditions, exposure to light and electricity.

Complete Step By Step Answer:
As we know that the mica is non-metal which is chemically inert, mica is lightweight, the mica also weights from opaque to transparent. Mica can withstand high temperature but is stable. Mica is used in electrical industries for making capacitors for high frequency and also for radio frequency. The conduction of heat and electricity in metals depends upon the free electrons that metal has on its surface. In non-metals the thermal conductivity has nothing to do with the free electrons and also non-metals don’t have free electrons on the surface.

Although micas are generally monoclinic, they are also found as the forms of hexagonal, orthorhombic, and triclinic structures. Micas occur in different sizes; in large crystal forms they are called books; mostly they occur in irregular tabular masses but some mica grains are extremely small also. The major applications of mica are that they are used as electrical insulators in electronic equipment, windows in the stove and kerosene heaters, dielectrics in capacitors, decorative panels in lamps, field coil insulation, etc.
Therefore, the correct answer is option A.

Note :
Remember that the thermal conductivity is related with the lattice vibration, so the thermal conduction of the mica is good but the surface of the mica doesn’t have free electrons and therefore mica is a bad conductor of electrical conduction.