CHAPTER 3 WATER MCQ

Temporary hard water contain-------and Permanent hard water contains -------

• bicarbonates of Ca and Mg

• chlorides and sulphates of Ca and Mg

• Option A and B

• chlorides and sulphates of Au and Ag

Hard water contains the salts of Ca and Mg. If hard water is used for drinking it causes stone in kidney.

• A is correct

• B is correct

• Both are correct

• Both are wrong

ClNH2 + H2O ----> ? + ?

• NH4,H2O

• H2O, NH4Cl

• Cl2,NH4Cl

• HOCl,NH3

Permanent hard water can be softened by-------method

• Clarks method

• Permutit method

• Ion exchange method

• Permutit and Ion exchange method

Suspended impurities can be removed by-------method.

• Sedimentation

• floating

• Aeration

• Coagulation

What are the factors affecting water quality?

• dissolved gases and salts,acidity and alkalinity of water

• dissolved salts and minerals

• acidity and alkalinity of water salts

• dissolved gases and salts

Water which does not produce lather but produce white curd with soap solution is known as -------

• Hard water

• Basic water

• Soft water

• Acidic water

During aeration process water comes in contact with these two things -------

• Sunlight and Oxygen of air

• moisture and dust

• dust and dirt

• oxygen and carbondioxid

The process in which water in the form of fine droplets spread into atmosphere is known as -------

• Sedimentation

• Coagulation

• Ozonization

• Aeration

Temporary hard water contain-------and Permanent hard water contains -------

• bicarbonates of Ca and Mg

• chlorides and sulphates of Ca and Mg

• Option 1 and 2

• chlorides and sulphates of Au and Ag