water treatment - 25.07.2023

The chemical formula of zeolite is

• FeSO₄.7H₂O

• Al₂(SO₄)₃.18 H₂O

• Na₂O.Al₂O₃.xSiO₂.yH₂O

• Na₂Al₂O

Which type of water cannot be softened using zeolite method?

• Brackish water

• Turbid water

• Acidic water

• All the above

Natural zeolites are ___________

• Porous

• Non porous

• Non-durable

• Possess gel structure

What is Calgon?

• Potassium hexa meta sulphate

• Magnesium hexa meta phosphate

• Sodium hexa meta phosphate

• Calcium hexa meta sulphate

Which of the following is not used in colloidal conditioning?

• Kerosene

• Tannin

• Agar-agar

• Vinegar

The example of brackish water is ___________

• Ground water

• Rain water

• Sea water

• Underground water

Which of the following technique is not used for the desalination of brackish water?

• Electrolysis

• Electrodialysis

• Reverse osmosis

• Distillation

The basis of reverse osmosis is _____________

• Osmotic pressure is greater than the hydrostatic pressure

• Osmotic pressure is equal to the hydrostatic pressure

• Hydrostatic pressure is greater than the osmotic pressure

• Osmotic pressure does not exist

Which of the following is not used for semi-permeable membrane?

• Polymethyl sulphate

• Cellulose acetate

• Cellulose Butyrate

• Polymethyl acrylate

The process of reverse osmosis is also known as ___________

• Hyper-filtration

• Double-filtration

• Double-osmosis

• Hyper-osmosis