# Which of the following statements is not correct?

$\begin{array}{1 1}\text{Silicon is extensively used as a semiconductor}\\\text{Carborundum is SiC}\\\text{Silicon occurs in free state in nature}\\\text{Mica contains the element silicon}\end{array}$

Answer : Silicon occurs in free state in nature
Silica does not occur freely in nature.Due to its great affinity for oxygen,it occurs either as oxide or as silicates