1.

The chemical formula of zeolite is ___________

A. FeSO<sub>4</sub>.7H<sub>2</sub>O
B. Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>.18 H<sub>2</sub>O
C. Na<sub>2</sub>O.Al<sub>2</sub>O<sub>3</sub>.xSiO<sub>2</sub>.yH<sub>2</sub>O
D. Na<sub>2</sub>Al<sub>2</sub>O
Answer» D. Na<sub>2</sub>Al<sub>2</sub>O


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