Stoichiometry Enthalpy of formation of NH₃ is - 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH₃ → N₂ + 3H₂, is equal to __________ kJ/kg. mole. 46 -23 -92 92 46 -23 -92 92 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The value of gas constant 'R' is __________ kcal/kg.mole.°C. 3.99 1.987 None of these 2.79 3.99 1.987 None of these 2.79 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times. 20 10 70 100 20 10 70 100 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The OH⁻ concentration in a solution having pH value 3 is 10-11 10-10 10-13 10-3 10-11 10-10 10-13 10-3 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 What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C? L/3 x 298/273 43864 43832 43833 L/3 x 298/273 43864 43832 43833 ANSWER DOWNLOAD EXAMIANS APP
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