1
GATE CE 2010
MCQ (Single Correct Answer)
+2
-0.6
Ion concentrations obtained for a groundwater sample (having pH=8.1) are given
below.
Total hardness (mg/L as $$CaCO_3$$) present in the above water sample is
Ion | $$Ca^{2+}$$ | $$Mg^{2+}$$ | $$Na^+$$ | $$HCO_3^-$$ | $$SO_4^{2-}$$ | $$Cl^{-}$$ |
---|---|---|---|---|---|---|
Ionconcentration(mg/L) | 100 | 6 | 15 | 250 | 45 | 39 |
Atomic Weight | Ca=40 | Mg=24 | Na=23 | H=1,C=12,O=16 | S=32,O=16 | Cl=35.5 |
Total hardness (mg/L as $$CaCO_3$$) present in the above water sample is
2
GATE CE 2010
MCQ (Single Correct Answer)
+2
-0.6
Ion concentrations obtained for a groundwater sample (having pH=8.1) are given
below.
Carbonate hardness (mg/L as $$CaCO_3$$) present in the above water sample is
Ion | $$Ca^{2+}$$ | $$Mg^{2+}$$ | $$Na^+$$ | $$HCO_3^-$$ | $$SO_4^{2-}$$ | $$Cl^{-}$$ |
---|---|---|---|---|---|---|
Ionconcentration(mg/L) | 100 | 6 | 15 | 250 | 45 | 39 |
Atomic Weight | Ca=40 | Mg=24 | Na=23 | H=1,C=12,O=16 | S=32,O=16 | Cl=35.5 |
Carbonate hardness (mg/L as $$CaCO_3$$) present in the above water sample is
3
GATE CE 2008
MCQ (Single Correct Answer)
+2
-0.6
A wastewater sample contains $$10^{-5.6}$$ mol/l of OH- ions at $$25^o$$ C. The pH of this
sample is
4
GATE CE 2005
MCQ (Single Correct Answer)
+2
-0.6
If tomato juice is having a pH of 4.1, the hydrogen ion concentration will be
Questions Asked from Quality Control of Water (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE CE Subjects
Engineering Mechanics
Strength of Materials Or Solid Mechanics
Structural Analysis
Construction Material and Management
Reinforced Cement Concrete
Steel Structures
Geotechnical Engineering
Fluid Mechanics and Hydraulic Machines
Geomatics Engineering Or Surveying
Environmental Engineering
Transportation Engineering
Engineering Mathematics
General Aptitude