Stoichiometry The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies XM < 0.5 0.5 < XM < 0.64 XM = 0.5 XM ≥ 0.64 XM < 0.5 0.5 < XM < 0.64 XM = 0.5 XM ≥ 0.64 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal to 1/x2 1 - (x1/x2) X1/x2 X2/x1 1/x2 1 - (x1/x2) X1/x2 X2/x1 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry 1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour? 15 10 5 20 15 10 5 20 ANSWER DOWNLOAD EXAMIANS APP
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) 350 140 345 485 350 140 345 485 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The crystallisation of a solute from a solution may be done by Changing the nature of the system by the addition of a more soluble material All of these Change of temperature thereby causing supersaturation Removal of pure solvent by evaporation Changing the nature of the system by the addition of a more soluble material All of these Change of temperature thereby causing supersaturation Removal of pure solvent by evaporation ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Pick out the correct conversion. 1 calorie = 453.6 BTU 1 calorie = 252 BTU 1 BTU = 252 calories 1 BTU =453.6 calories 1 calorie = 453.6 BTU 1 calorie = 252 BTU 1 BTU = 252 calories 1 BTU =453.6 calories ANSWER DOWNLOAD EXAMIANS APP
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