Question

Straight chain silicones are prepared by hydrolysis by:

• A. $R_{2}SiC{l}_2$
• B. $R_{3}SiCl$
• C. $RSiC{l}_3$
• D. $R_{2}Si$

Answer 1

The correct option is A $R_{2}SiC{l}_2$

Hydrolysis of $R_{2}SiC{l}_2$ gives straight chain that is linear silicones.

For example, if we consider $R$ as $-C{H}_3$ group, the molecule becomes $(C{H}_3{)}_{2}SiC{l}_2$, that is Dimethyldichlorosilane. On performing hydrolysis of this compound, we get.

$n(C{H}_3{)}_{2}SiC{l}_2$$+$$n{H}_{2}O$$=$$\left[\right(C{H}_3{)}_{2}SiO{]}_n$$+$$2nHCl$, where $n$ represents an integer or the number of moles.

$\left[\right(C{H}_3{)}_{2}SiO{]}_n$ are the straight chain silicones, that is compounds containing $Si-O$ backbones. They are polymers.

Option A is the correct answer.