question_answer

           Which one of the following statements about the  zeolites is false :-                                          

A)  They have open structure which enables them to take up small molecules                            

B)  Zeolites are alumino silicates having three dimensional network 

C)  Some of the \[SiO_{4}^{4-}\] units are replaced by \[AlO_{4}^{5-}\]and \[AlO_{6}^{9-}\] ions in zeolites

D)  They are used as cation exchangers.