Which of the following statements is not correct?

Question

$\begin{array}{1 1}\text{Silicon is the second member of group 14}\\\text{Silicon tetrahalide exhibits the phenomenon of hydrolysis}\\\text{Because of large radius of silicon atom,the latter does not form the bonds of the type Si=Si,Si=Si}\\\text{Silicon dioxide molecules in solid phase are held together by vander waals forces}\end{array}$