Description : The activity and selectivity of zeolites as catalyst is based on :-
Last Answer : The activity and selectivity of zeolites as catalyst is based on :- A. Their pore size B. Size of their cavities on the surface C. Both D. None
Description : Zeolites are :-
Last Answer : Zeolites are :- A. Water softner B. Catalyst C. cation exchanger D. All of these
Description : Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of (1) Nitrates (2) Zeolites (3) Sulphonates (4) None of these
Last Answer : (2) Zeolites Explanation: Zeolites are crystalline solids structures made of silicon, aluminum and oxygen that form a framework with cavities and channels inside where cations, water and/or small molecules may reside.
Description : What are the Uses of Zeolites?
Last Answer : Ans. They are used as shape selective catalysts To remove the hardness of water
Description : What are zeolites?
Last Answer : Ans. They are the alumino silicates and used as shape selective catalysts. Eg.ZSM-5
Description : Which property of Zeolites make it suitable to soften hard water?
Last Answer : Ans-Sodium ions are exchanged by calcium and magnesium ions
Description : Molecular sieves are porous (A) Alumina (B) Silica (C) Synthetic zeolites crystals/metal alumino-silicates (D) None of these
Last Answer : (C) Synthetic zeolites crystals/metal alumino-silicates
Description : Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of (A) Calcium sulphate (B) Sodium chloride (C) Sodium sulphate (D) Magnesium chloride
Last Answer : (B) Sodium chloride
Description : Permanent hardness of water can be removed by (A) Addition of soda ash to it (B) Treating it with zeolites (C) Passing it through sodium hexametaphosphate (D) All (A), (B), and (C)
Last Answer : (D) All (A), (B), and (C)