0% 0 Stoichiometry Quiz 4 1 / 50 No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules______? Do work equal to loss in kinetic energy Are above the inversion temperature Collide without loss of energy Exert no attractive force on each other 2 / 50 Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0?C will be ________ atmosphere? 1.5 2 0.5 1 3 / 50 Number of gram equivalent of solute dissolved in one litre of solution is called its_____? Molality Normally Molarity Formality 4 / 50 Lower wall courses of soaking pits are made of ______ bricks to avoid the action of molten slag & scale? Silica Low duty fireclay Silicon carbide Chrome or magnesite 5 / 50 Isotopes are atoms having the same _______? Atomic mass Mass number None of these Number of neutrons 6 / 50 Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is_________? 32.2 58.65 20 45.35 7 / 50 Percentage saturation of a vapor bearing gas is always ______ the relative saturation? Equal to Either A. or B.; depends on the system Smaller than Higher than 8 / 50 Magnesite refractories are used for the construction of those furnaces, which are________? Both B. and C. Not subjected to fluctuation in temperature Not required to resist the corrosive action of basic slag Used for raising & maintaining high temperature 9 / 50 Increasing the temperature of an aqueous solution will cause decrease in its_________? Molarity Mole fraction Weight percent Molality 10 / 50 Kinetic theory of gases stipulates that, the______? None of these Molecules possess appreciable volume Energy is lost during molecular collisions Absolute temperature is a measure of the kinetic energy of molecules 11 / 50 In panel test for spalling resistance, the average face temperature of panel assembly is maintained at ______ ?C for 24 hours? 2000 1600 1000 700 12 / 50 One micron is equal to ______ cm? 2-Oct 8-Oct 4-Oct 6-Oct 13 / 50 pH value of a solution containing 1 gm of hydrogen ion per litre will be ______? 1 10 7 0 14 / 50 Kopp?s rule is concerned with the calculation of___________? Viscosity Thermal conductivity Heat capacity Surface tension 15 / 50 Measurement of the amount of dry gas collected over water from volume of moist gas is based on the_____? Charle?s law Boyle?s law Dalton?s law of partial pressures Avogadro?s hypothesis 16 / 50 One Newton is equal to _______ dynes? 104 105 103 102 17 / 50 On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is _______ gm? 41 82 8.2 164 18 / 50 Pick out the correct statement ? At equilibrium, ?G is zero Heat of solution is always positive The heating of water in a beaker is an example of an isolated system For the reaction, PCl5 ? PCl3 + Cl2, ?G is less than ?E 19 / 50 Pick out the correct conversion? 1 BTU =453.6 calories 1 calorie = 453.6 BTU 1 calorie = 252 BTU 1 BTU = 252 calories 20 / 50 pH value of H2SO4 (5% concentration) is___________? 7 > 7 < 7 5 21 / 50 Magnesite refractories are generally not used in the___________? Burning zone of cement kilns Steel melting furnace Open hearth furnace Electric furnace walls 22 / 50 Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is________? 3 0 1 2 23 / 50 Maximum alumina content in high alumina refractory can be as high as _____ percent? 90 50 70 30 24 / 50 N2 content in a urea sample was found to be only 42%. What is the actual urea content of the sample? (Molecular weight of urea = 60) ? 90% 98% 80% 95% 25 / 50 Internal energy is independent of the _____ for an ideal gas? Neither A. nor B. Volume Pressure Both A. & B. 26 / 50 Isotonic solutions must have the same___________? Normality Viscosity Critical temperature Molar concentration 27 / 50 Number of gm moles of solute dissolved in one liter of a solution is called its______? Normality Molarity Molality Equivalent weight 28 / 50 One kg of saturated steam at 100?C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98?C; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The latent heat of condensation (kJ/kg-1 ) under these conditions is_____? 540 2263 2676 40732 29 / 50 Molar heat capacity of water in equilibrium with ice at constant pressure is_______? ? 0 1 None of these 30 / 50 Kopp?s rule is helpful in finding the___________? Activation energy Molal heat capacities of gases Heat capacities of gases Heat capacities of solids 31 / 50 pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be__________? 14 0 7 10 32 / 50 N.T.P. corresponds to___________? 760 mm Hg gauge pressure & 0?C 101.325 KPa gauge pressure & 0?C 760 torr & 15?C 1 atm absolute pressure & 0?C 33 / 50 One ?Therm? is equivalent to_____? 105 BTU 109 kcal 105 kcal 109 BTU 34 / 50 Osmotic pressure of the solution can be increased by__________? Increasing the volume of the vessel containing the solution Decreasing its temperature None of these Diluting the solution 35 / 50 Outer combustion chamber of blast furnace stove is lined with ________ bricks? Chrome magnesite Zirconia Fireclay Silica 36 / 50 One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 ? CO2 + 2H2O. Both the reactants and products are in gas phase. ?H?298 = ? 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about_______? 0.19 0.33 0.4 0.67 37 / 50 Kinematic viscosity of 1 m2 /second is equivalent to ______ stokes? 104 102 10 103 38 / 50 Permeability of bricks is a measure of the_____? Rate at which a fluid will pass through the pores Melting point Refractoriness Expansion during heating 39 / 50 Kopp?s rule is useful for the determination of_______? Heat capacities of solids Activation energy Molal heat capacities of gases Heat capacities of gases 40 / 50 Othmer chart is useful in estimating the heat of________? None of these Adsorption Wetting Mixing 41 / 50 One of the specific gravity scales is ?Brix? (used specifically for sugar solution). It is defined as _______? Brix = (400/G) ? 400 None of these Brix = 145 ? (145/G) Brix = 200 (G-1) 42 / 50 Pick out the correct statement ? 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 The end points of a vapor-pressure vs. temperature curve are critical and triple points A substance existing above its critical temperature is called a saturated vapor 43 / 50 In the reaction, represented by Na2CO3 + HC1 ? NaHO3 + NaCl, the equivalent weight of Na2CO3 is_________? 10.6 106 5.3 53 44 / 50 Molality is defined as the number of gm moles of solute per ______ of solvent? gm.mole kg gm Litre 45 / 50 Panel test determines the _______ of refractories? Spalling resistance Refractoriness under load (RUL) Slag penetration resistance Fusion point 46 / 50 Number of gm moles of solute dissolved in 1 kg of solvent is called its_____? Molarity Formality Normality Molality 47 / 50 Normality of a solution does not change with the increase in the ___________? Pressure Temperature Dilution of the solution Solute concentration 48 / 50 Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult?s law is proportional to the______? Moles of non-volatile solute Temperature None of these Volume of solution 49 / 50 Internal energy of a substance comprises of the ______ energy? All A., B. & C. Vibrational Translational Rotational 50 / 50 In physical adsorption, as compared to chemisorption, the__________? Rate of adsorption is controlled by the resistance to surface reaction Activation energy is very high Heat of adsorption is very large Quantity adsorbed per unit mass is higher Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevStoichiometry Quiz 3 Stoichiometry Quiz 5Next
