Is quartz a homogeneous or heterogeneous substance?

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Question:

Is quartz a homogeneous or heterogeneous substance?

Answers

Quartz (also known as silica) is a crystalline pure substance composed of silicon dioxide (SiO2). It is ,therefore, homogeneous.It is good to know that inhaling  finely divided crystalline silica  can be poisonous and can lead to several diseases including lung cancer, bronchitis as well as  silicosis.

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