Which of the following statements is not correct ?

Question

$\begin{array}{1 1} \text{Organosilicon polymers are known as silicone} \\ \text{Silicones have the general formula } (R_2Sio)_n \;where\;R=-CH_3 - C_2H_5-C_6H_5\;etc \\ \text{Hydrolysis of dialkyldichlorosill are produces cross - linked silicon polymer } \\ \text{Hydrolysis of alkyltrichlorosilane produces cross - linked silicon polymer } \end{array}$