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) 350 345 140 485 350 345 140 485 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor. Dry gaseous Saturated Unsaturated Superheated Dry gaseous Saturated Unsaturated Superheated 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 Four fold increase No change L/4th reduction Doubling Four fold increase No change L/4th reduction ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75ρ at a temperature of __________ °K 300° 273° 300° 400° 300° 273° 300° 400° ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry 2 litres of nitrogen at N.T.P. weighs __________ gms. 2.5 14 1.25 28 2.5 14 1.25 28 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry In a neutral solution Both H⁺ and OH⁻ ions are present in very small but equal concentration H⁺ ions are absent OH⁻ ions are absent None of these Both H⁺ and OH⁻ ions are present in very small but equal concentration H⁺ ions are absent OH⁻ ions are absent None of these ANSWER DOWNLOAD EXAMIANS APP
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