Quartz crystals normally used in quartz clocks etc. is chemically

A. Silicon Dioxide

B. Germanium Oxide

C. A mixture of Germanium Oxide and Silicon dioxide

D. Sodium Silicate

Answer: Option A

Solution(By Examveda Team)

The working of Quartz is usually by a crystal oscillator. The Silicon dioxides are the crystals which are piezoelectric and can be further used as speakers and microphones.