Zeolites

Q. Which of the following methods is/are used to remove permanent hardness of water?

1. Calgon's method
2. Ion exchange method
3. Synthetic resin method
4. Clark's method

Q.

Reactions in zeolite catalyst depend on

1. Pores

2. Apertures

3. Size of cavities

4. All of these

Q. The most likely geometry for a silicate unit is:

1. square planar
2. octahedral
3. tetrahedral
4. square pyramidal