Question : Which of the following is not a semiconductor?
Option 1: Silicon
Option 2: Krypton
Option 3: Selenium
Option 4: Germanium
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Correct Answer: Krypton
Solution : The correct option is Krypton .
Krypton is an inert element with a very low level of reactivity because it is a noble gas. Noble gases having entire electron shells, like krypton, are exceedingly stable, and inert toward other elements. Semiconductors are substances with electrical conductivities between those of insulators, and conductors, such as metals.
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