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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} $

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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
answered Jul 24, 2014 by sreemathi.v
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