The OH- concentration in a solution having pH value 3 is____________________?
The OH- concentration in a solution having pH value 3 is____________________?
A. 10-3
B. 10-10
C. 10-11
D. 10-13
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A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16) ?
A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16) ?A. 350
B. 485
C. 140
D. 345Pick out the wrong unit conversion of thermal conductivity ?
Pick out the wrong unit conversion of thermal conductivity ?A. 1 BTU/ft2.hr.°F/ft = 1.488 kcal/m2. hr.°C/m
B. 1 BTU/ft2.hr.°F/inch = 1.488 kcal/m2. hr.°C/m
C. 1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K
D. 1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°FA vapor that exists above its critical temperature is termed as a _____________ vapor?
A vapor that exists above its critical temperature is termed as a _____________ vapor?A. Saturated
B. Unsaturated
C. Gaseous
D. Sub-cooledConcentration of a solution expressed in terms of _______________ is independent of temperature?
Concentration of a solution expressed in terms of _______________ is independent of temperature?A. Molarity
B. Normality
C. Molality
D. None of theseA compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is_________________?
A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is_________________?A. N2O4
B. N2O5
C. N2O3
D. None of theseMolar heat capacity of water in equilibrium with ice at constant pressure is_____________________?
Molar heat capacity of water in equilibrium with ice at constant pressure is_____________________?A. 0
B. ∞
C. 1
D. None of these