0% 0 Stoichiometry Quiz 3 1 / 50 How much O2 can be obtained from 90 kg of water ? 80 kg 64 kg 90 kg 32 kg 2 / 50 In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is___________? Decreased with the increase in pressure Increased with the increase in pressure Unchanged by the pressure change Independent of the temperature 3 / 50 In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is___________? Increases with rise in pressure Unchanged with pressure changes Increased with decrease in pressure Independent of temperature 4 / 50 In a binary liquid solution of components ?A? and ?B?, if component ?A? exhibits positive deviation from Raoult?s law, then component ?B? ? May exhibit either positive or negative deviation from Raoult?s law Obeys Raoult?s law Exhibits positive deviation from Raoult?s law Exhibits negative deviation from Raoult?s law 5 / 50 In case of a ternary system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the_______? Both A. & B. Temperature Solute concentration Neither A. nor B. 6 / 50 How many phases are present at eutectic point ? unpredictable 1 3 2 7 / 50 For any system, the ______ heat of solution is dependent on the temperature and the adsorbate concentration? Both A. & B. Differential Neither A. nor B. Integral 8 / 50 If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its_____? Dew point Saturation temperature Both B. and C. Bubble point 9 / 50 In osmosis through a semi-permeable membrane, diffusion of the_____? Solute takes place Solvent is from high concentration to low concentration region None of these Solvent is from low concentration to high concentration region 10 / 50 If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will ________? Increase three fold Remain unaltered Decrease three fold Increase nine fold 11 / 50 In ________ process, ions of salts react with water to produce acidity or alkalinity ? Hydrolysis Electrolysis Dialysis Hydration 12 / 50 Heat of reaction is a function of the_____? Neither A. nor B. Temperature Both A. & B. Pressure 13 / 50 Heat of solution in a system in which both solute and solvent are liquids is termed as__________? Heat of mixing Heat of hydration Heat of solvation Standard integral heat of solution 14 / 50 Except for monatomic gases, the molal heat capacity at constant volume for all gases is ______ Kcal/Kg mole.? K? > 3 < 1 3 < 3 15 / 50 High porosity refractory bricks have_________? All A., B. and C. Poor heat conductivity & low strength Poor resistance to the penetration of molten slag, metal & flue gases Better thermal spalling resistance 16 / 50 Heat of reaction is not influenced by___________? None of these The physical state (e.g., solid, liquid or gaseous) of reactants and products Whether the reaction is carried out at constant temperature or constant pressure The route/method through which final products are obtained 17 / 50 For estimation of heat capacity of a solid compound, one can use_________? Kopp?s rule Trouton?s rule Clapeyron?s equation Gibb?s equation 18 / 50 Hess?s law of constant heat summation is based on conservation of mass. It deals with _____? None of these Reaction rate Changes in heat of reaction Equilibrium constant 19 / 50 Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10-3 T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500?C to ? 100?C is ______? 18.11 kJ 16.15 kJ 10.73 kJ 18.33 kJ 20 / 50 Heat of neutralisation of HCl and NaOH is ? 57.46 kJ/Kg mole. The heat of ionisation of water will be ______ kJ/Kg mole? -57.46 57.46 114.92 -28.73 21 / 50 For an ideal gas, the compressibility factor_________? Is unity at all temperature Is unity at Boyle?s temperature Decreases with pressure rise Zero 22 / 50 For most salts, the solubility increases with rise in temperature, but the solubility of ________ is nearly independent of temperature rise? Hypo Sodium carbonate monohydrate Anhydrous sodium sulphate Sodium chloride 23 / 50 Heat of _____ of a fuel is called its calorific value? Formation Reaction Vaporisation Combustion 24 / 50 If pH value of a solution is 8, then its pOH value will be ______? 7 6 1 10 25 / 50 Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because__________? The strong base and strong acid reacts completely The salt formed does not hydrolyse Only OH- and H+ ions react in every case The strong base and strong acid reacts in aqueous solution 26 / 50 For a given mass of a gas at constant temperature, if the volume ?V? becomes three times, then the pressure ?P? will become_______? 9P P/3 9P2 3P 27 / 50 Heat of transition is the heat evolved or absorbed, when a substance is converted from__________? Vapor to solid Solid to liquid One allotropic form to another allotropic form Vapor to liquid 28 / 50 In a chemical process, the recycle stream is purged for________? Increasing the product yield Limiting the inerts Enriching the product Heat conservation 29 / 50 In a binary liquid system, the composition expressed as ________ is independent of the temperature & pressure? Kg of solute/kg of solvent Kg-mole of solute/1000 kg of solvent Kg-mole of solute/kg-mole of solvent All A., B. & C. 30 / 50 If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is ______ times? 100 10000 10 1000 31 / 50 For a reaction, X ? Y, if the concentration of ?X? is tripled; the rate becomes nine times. The order of reaction is___________? 3 0 1 2 32 / 50 In a neutral solution __________? Both H+ and OH- ions are present in very small but equal concentration H+ ions are absent None of these OH- ions are absent 33 / 50 Fireclay bricks are not used in the__________? Blast furnace Wall of coke oven Cupola Hot blast stove 34 / 50 Faster rate of drying of moulded refractories results in high _______ of refractories? Green strength Shrinkage Both B. and C. Voids 35 / 50 In general, the specific heats of aqueous solutions ______ with increase in the concentration of the solute? Remain unchanged Increase None of these Decrease 36 / 50 Hot metal runner in blast furnace are lined with _______ bricks? Carborundum Fireclay Magnesite Silica 37 / 50 In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the_________? Both A. and B. Neither A. nor B. Total pressure Absolute humidity at a given temperature 38 / 50 Gases diffuse faster compared to liquids because of the reason that the liquid molecules__________? Have no definite shape Are heavier Move faster Are held together by stronger inter-molecular forces 39 / 50 If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will__________? Be reduced to 1/4th None of these Increase two times Increase four times 40 / 50 Fusion point of a basic refractory material is_________? Increased by the addition of acid oxides Not affected by the addition of acid oxides Always less than 1000?C Reduced by the addition of acid oxides 41 / 50 For an ideal solution, the total vapor pressure varies ______ with the composition (expressed as mole fraction)? Exponentially Inversely Negligibly Linearly 42 / 50 Gases having same reduced temperatures and reduced pressures__________? Both A. and B. Have nearly the same compressibility factor Neither A. nor B. Deviate from ideal gas behaviour to the same degree 43 / 50 Fireclay bricks is not used for lining the________? Cupola Roof of open hearth furnace Bottom of hot metal mixer Gas producer 44 / 50 For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the _____ remains constant throughout the period of vaporisation ? Humidity Dry bulb temperature Relative saturation Wet bulb temperature 45 / 50 If 1 Nm3 of O2 contains ?N? number of molecules, then number of molecules in 2Nm3 of SO2 will be__________? 2N N/2 4N N 46 / 50 If a solution of eutectic composition is cooled, ________ reaching the eutectic temperature ? It will not solidify even on It will undergo no change until None of these The solvent begins to freeze out even before 47 / 50 In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality ? None of these Activity co-efficient Fugacity co-efficient Use of equation of state 48 / 50 In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is___________? 180 720 200 60.3 49 / 50 Fireclay bricks are used in the_______? Outer lining of L.D. converter Hearth bottom of blast furnace Coke ovens regenerator Coke oven walls 50 / 50 Fireclay bricks are not used in the_________? By-product coke oven walls Combustion chamber of B.F. stoves Beehive coke oven Coke oven regenerators 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 2 Stoichiometry Quiz 4Next
