Stoichiometry 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) 140 345 350 485 140 345 350 485 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Number of gm moles of solute dissolved in one litre of a solution is called its Molarity Normality Equivalent weight Molality Molarity Normality Equivalent weight Molality ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas. Doubling L/4th reduction No change Four fold increase Doubling L/4th reduction No change Four fold increase ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10⁻³ T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to - 100°C is 10.73 kJ 18.33 kJ 16.15 kJ 18.11 kJ 10.73 kJ 18.33 kJ 16.15 kJ 18.11 kJ ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry N₂ content in a urea sample was found to be only 42%. What is the actual urea content of the sample ? (molecular weight of urea = 60) 0.8 0.95 0.9 0.98 0.8 0.95 0.9 0.98 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is Greater than 80.1°C but less than 100°C Less than 80.1°C 100°C 80.1°C Greater than 80.1°C but less than 100°C Less than 80.1°C 100°C 80.1°C ANSWER DOWNLOAD EXAMIANS APP
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