wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which one of the following statements about the zeolites is false ?

AIPMT 2004

A
Some of the SiO44 units are replaced by AlO54 and AlO96 ions in zeolites
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
They have open structure which enables them to take up small molecules
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Zeolites are aluminosilicates having three dimensional network
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
They are used as cation exchangers
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Some of the SiO44 units are replaced by AlO54 and AlO96 ions in zeolites
(A) Zeolites are natural ion exchangers. For example, permutit water softeners are sodium zeolites. They take up calcium ions from hard water and release sodium ions in water.
Thus, the statement A is correct.
(B) Zeolites are like molecular sieves. They trap small molecules such as water, ammonia and carbon dioxide in their interstices.
Thus, the option B is correct.
(C) zeolites are aluminosilicates having three dimensional network. They are termed aluminosilicates because, some of the the Si4+ ions may be replaced by Al3+.
Thus, the option C is correct.
(D) In zeolites, some of the the Si4+ ions may be replaced byAl3+. This results in unbalanced anionic charge. To maintain electrical neutrality, positive ions must be introduced. Thus, the statement D is incorrect.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction to Circles
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon