Stoichiometry The heat evolved in the combustion of benzene is represented by the equation: C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole. +816.15 -1632.3 +1632.3 -2448.45 +816.15 -1632.3 +1632.3 -2448.45 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is 2 3 1 2 3 1 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes 1 4 8 2 1 4 8 2 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The net heat evolved or absorbed in a chemical process, i.e. total change in the enthalpy of the system is independent of the State of aggregation & the state of combination at the beginning & the end of the reaction Number of intermediate chemical reactions involved None of these Temperature & pressure State of aggregation & the state of combination at the beginning & the end of the reaction Number of intermediate chemical reactions involved None of these Temperature & pressure ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The value of Trouton's ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids. Neither A nor B Polar Both A & B Non-polar Neither A nor B Polar Both A & B Non-polar ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Gases diffuse faster compared to liquids because of the reason that the liquid molecules Are held together by stronger inter-molecular forces Are heavier Move faster Have no definite shape Are held together by stronger inter-molecular forces Are heavier Move faster Have no definite shape ANSWER DOWNLOAD EXAMIANS APP
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