Question

Which of the following options are correct?
A.Zeolites are porous
B.Zeolites are non-porous
C.They are alumina phosphate materials
D.They are used as adsorbents and catalysts

Answer 1

This question might contain more than one option as the correct answer. We have to eliminate the statements that are not true and thus obtain the correct statements. Zeolites are members of a family of hydrated aluminosilicate minerals that contain alkali and alkaline-earth metals. They are mainly used in the different chemical industries as adsorbents and catalysts.

Complete answer:
Zeolites are porous crystalline silicates with a complex structure giving rise to specific molecule-sized pores in its surface. They can have a variety of compositions with some of the silicon atoms replaced by other cations or impurities. The cations in the zeolites are also responsible for the catalytic properties of these materials.
Thus from this we can say that the Zeolites are porous materials.
In a zeolite, the reactive surfaces are due to the presence of $A{l^{3 + }}\;$ on adsorption sites with a $S{i^{4 + }}$ ion resides, and the microporous crystalline system. These properties allow the zeolite for several applications such as being used as an adsorbent and catalyst.
Therefore we can say that the correct answer for this question is options (A) and (D).

Note:
In questions dealing with multiple correct answers, always try eliminating the obvious wrong answers. In this question, only option A or B can be correct. Thus eliminate the wrong ones and then find out the answer. Zeolites are important catalysts in cracking, isomerization, and hydrocarbon synthesis.