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? 5 15 20 10 5 15 20 10 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Increasing the temperature of an aqueous solution will cause decrease in its Molarity Mole fraction Weight percent Molality Molarity Mole fraction Weight percent Molality ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at Product enrichment Heat conservation Yield enhancement None of these Product enrichment Heat conservation Yield enhancement None of these ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry A car tyre of volume 0.057 m³ is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is 760 630 380 880 760 630 380 880 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry For a neutral solution (pH = 7), the value of[H⁺] [OH⁻] is equal to 1 > 1 < 1 1 > 1 < 1 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Which of the following has the smallest least effect on the solubility of a solute into the solvent? Temperature Nature of the solute Nature of the solvent Pressure Temperature Nature of the solute Nature of the solvent Pressure ANSWER DOWNLOAD EXAMIANS APP
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