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Home⇒ Engineering⇒
Stoichiometry
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Dry air is a mixture of gases [other wrong options] [Discuss in forum] vapors both (a) & (b) neither (a) nor (b) |
Q22 ⇒ The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen. lower than [other wrong options] [Discuss in forum] higher than same as not related to |
Q23 ⇒ The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately 0.13 [other wrong options] [Discuss in forum] 0.07 0.09 0.11 |
Q24 ⇒ An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is 0.5055 [other wrong options] [Discuss in forum] 0.25 0.2528 0.5 |
Q25 ⇒ Which of the following is not a unit of pressure? Parsec [other wrong options] [Discuss in forum] Kilo-pascal Bar Newton/metre2 |
Q26 ⇒ In a neutral solution both H+ and OH- ions are present in very small but equal concentration. [other wrong options] [Discuss in forum] H+ ions are absent. OH- ions are absent. none of these. |
Q27 ⇒ The temperature at which a real gas obeys Boyle's law is termed as the Boyle's temperature [other wrong options] [Discuss in forum] triple point eutectic point inversion temperature |
Q28 ⇒ Size range of the colloidals particles is 5 - 200 milli-microns [other wrong options] [Discuss in forum] 50 - 200 microns 500 - 1000 microns 10 - 50 Angstrom |
Q29 ⇒ How much O2 can be obtained from 90 kg of water ? 80 kg [other wrong options] [Discuss in forum] 32 kg 64 kg 90 kg |
Q30 ⇒ Kopp's rule is useful for the determination of heat capacities of solids. [other wrong options] [Discuss in forum] molal heat capacities of gases. activation energy. heat capacities of gases. |
Q31 ⇒ A chemical process is said to occur under unsteady state, if the flow rates & composition both are time dependent. [other wrong options] [Discuss in forum] inventory changes do not take place. ratio of streams entering/leaving are independent of time. none of these. |
Q32 ⇒ Pick out the correct statement. The end points of a vapor-pressure vs. temperature curve are critical and triple points. [other wrong options] [Discuss in forum] A substance existing above its critical temperature is called a saturated vapor. A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is more than the partial pressure of the vapor at the same temperature. Heat added to or given up by a substance at constant temperature is called the sensible heat. |
Q33 ⇒ A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be -136.5°C [other wrong options] [Discuss in forum] 0°C 0°K -136.5°K |
Q34 ⇒ Validity of the relationship, inputs = outputs, holds good for the system at steady state without chemical reaction & losses. [other wrong options] [Discuss in forum] with chemical reaction. without chemical reaction. none of these. |
Q35 ⇒ At a temperature of 0°K, the molecules of a gas have only __________ energy. translational [other wrong options] [Discuss in forum] rotational vibrational none of these |
Q36 ⇒ Pick out the wrong statement: The integral heat of solution of either components can not be calculated from heat of mixing data. [other wrong options] [Discuss in forum] The average value of heat of neutralisation of dilute solutions of weak acids and bases is much less compared to that for strong acids and bases. The standard heat of solution of the hydrate of a substance is the difference between the heat of solution of the anhydrous substance and its heat of hydration. The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the nature & amount of the solute & the solvent, on the temperature & on the initial & final concentrations of the solution. |
Q37 ⇒ The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be basic [other wrong options] [Discuss in forum] more acidic neutral of the same acidity |
Q38 ⇒ Claussius Clapeyron equation applies to the __________ process. all (a), (b) & (c) [other wrong options] [Discuss in forum] sublimation melting vaporisation |
Q39 ⇒ For an endothermic reaction, the minimum value of energy of activation will be (where, ΔH = enthalpy of the reaction) >ΔH [other wrong options] [Discuss in forum] Δ H <ΔH 0 |
Q40 ⇒ What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively ? 801.5 [other wrong options] [Discuss in forum] 756.2 780.5 880.5 |
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