1.

The repeating unit in silicone is

Answer»

`SiO_(2)`
`-OVERSET(R )overset(|)underset(R )underset(|)Si-O-`
`R-O-overset(|)underset(R )underset(|)Si-O`
`-underset(R )underset(|)overset(|)Si-O-O-R`

Solution :`-overset(R )overset(|)underset(R )underset(|)Si-O-`


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