Silicones can be oils or rubber-like materials depending on . Select one: A. the silicon-to-oxygen ratio B. the length of the chain and degree of cross-linking C. the percentage of carbon in the chain D. the oxidation state of silicon in the chain E. the percentage of sulfur in the chain

B-- the length of the chain and degree of cross-linking.

Explanation: Silicones can be oils or rubber-like materials depending on ___the length of the chain and degree of cross-linking.

Silicone rubber is an elastomer which is composed of silicone containing silicon together with carbon, hydrogen, and oxygen. silicone rubber can be found in a wide variety of products because of its ability to withstand very high temperatures and pressures. eg cooking and food storage products; clothing apparels , automotive devices etc   while

Silicone oil is a linear chain siloxane repeating units Si--0 with radical side group as such as methyl, phenyl etc  bonded to it. They are oils because of they are  viscose  and have ability to  repel. Silicone oils are mostly employed in medicine for surgical tools.

a is the correct answer