Permanent hardness of water is caused due to the presence of dissolved
A. calcium hydrogen carbonates
B. magnesium hydrogen carbonates
C. chlorides of magnesium
D. Sulphates of magnesium
Related Questions on Chapter 7: Environmental Chemistry II Water Chemistry Mcqs for High School - Grade 10
The ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
A. 0.0840277777777778
B. 0.0430555555555556
C. 0.125694444444444
D. 0.167361111111111
What is the fourth step of raw water treatment?
A. sedimentation
B. coagulation
C. filtration
D. chlorination
The hardness that cannot be removed by boiling is called
A. temporary hardness
B. permanent hardness
C. semi temporary hardness
D. semi permanent hardness
A. primary sewage treatment
B. secondary sewage treatment
C. activated sludge treatment
D. chlorination