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