Description : In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than is Kc? (A) 2HI ⇌ H2 + I2 (B) N2O4 ⇌ 2NO2 (C) 2SO2 + O2 ⇌ 2SO3 (D) None of these
Last Answer : (B) N2O4 ⇌ 2NO2
Description : In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffected by pressure changes? (A) 2O3 ⇌ 3O2 (B) N2 + O2 ⇌ 2NO (C) 2NO2 ⇌ N2O4 (D) 2SO2 + O2 ⇌ 2SO3
Last Answer : (B) N2 + O2 ⇌ 2NO
Description : In the reaction, H2 +I2 ⇌ 2HI, addition of an inert gas will (A) Increase the partial pressure of H2 (B) Increase the partial pressure of I2 (C) Increase the total pressure and hence shift the equilibrium towards the right (D) Not affect the equilibrium conditions
Last Answer : (D) Not affect the equilibrium conditions Share
Description : In case of the decomposition of hydroiodic acid (2HI ⇌ H2 + I2), addition of H2(at equilibrium condition) will (A) Increase the partial pressure of I2 (B) Decrease the partial pressure of HI (C) Diminish the degree of dissociation of HI (D) None of these
Last Answer : (C) Diminish the degree of dissociation of HI
Description : In the reaction; N2 + O2 ⇌ 2NO, increasing the pressure will result in (A) Shifting the equilibrium towards right (B) Shifting the equilibrium towards left (C) No change in equilibrium condition (D) None of these
Last Answer : (C) No change in equilibrium condition
Description : In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by (A) High temperature (B) Low pressure (C) Low temperature only (D) Both low temperature and high pressure
Last Answer : (D) Both low temperature and high pressure
Description : In the reaction, represented by, 2SO2 + O2 ⇌ 2SO3; ΔH = - 42 kcal; the forward reaction will be favoured by (A) Low temperature (B) High pressure (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O ⇌ CO2 + H2, by (A) Low temperature and high pressure (B) Low temperature and low pressure (C) High temperature and high pressure (D) High temperature and low pressure
Last Answer : (A) Low temperature and high pressure
Description : In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3 ), the value of the equilibrium constant depends on the (A) Total pressure of the system (B) Volume of the reactor (C) Temperature (D) Initial concentration of N2 and H2
Last Answer : (C) Temperature
Description : If in the gaseous phase reaction, N2O4 ⇌ 2NO2 , x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be (A) (1 + x) (B) (1 - x) (C) (1 + x) 2 (D) (1 - x)
Last Answer : (A) (1 + x)
Description : For the equilibrium Cl2(g) + 2NO(g) ⇌ 2NOCl(g) the concentration of NOCl will increase if the equilibrium is disturbed by ………..
Last Answer : For the equilibrium Cl2(g) + 2NO(g) ⇌ 2NOCl(g) the concentration of NOCl will increase if the equilibrium ... NO c. adding NOCl d. removal of Cl2
Description : The effect of increasing pressure on the gaseous equilibrium of the reaction2X + 3Y ⇌ 3X + 2Y indicates that (A) Pressure has no effect (B) Backward reaction is favoured (C) Forward reaction is favoured (D) None of the
Last Answer : (A) Pressure has no effect
Description : All gases during throttling process at atmospheric temperature and pressure show a cooling effect except (A) CO2 (B) H2 (C) O2 (D) N2
Last Answer : (B) H2
Description : Main constituents of purified Lurgi gas are (A) H2 , CmHn & CO2 (B) CO, H2 & CH4 (C) CO2 , O2 & CO (D) N2 , H2 & CO2
Last Answer : (B) CO, H2 & CH4
Description : Naphtha in a fertiliser plant is used as a source of (A) Fuel (B) H2 (C) N2 (D) O2
Description : The essential ingredient of all the synthesis gas is (A) H2 (B) O2 (C) CO2 (D) N2
Last Answer : (A) H
Description : Which of the following behaves most closely like an ideal gas? (A) He (B) N2 (C) O2 (D) H2
Last Answer : (A) He
Description : In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3 ), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to ... some quantity of SO3 during intermediate stage (D) Maintaining low temperature & pressure in the converter
Last Answer : (C) Removing some quantity of SO3 during intermediate stage
Description : Which of the following molecules contains a polar covalent bond A.H2 B.N2 C.CO D.O2?
Last Answer : C. CO
Description : Which of the following has the highest bond order? (1) N2 (2) O2 (3) Cl2 (4) H2
Last Answer : (1) N2 Explanation: A high bond order indicates more attraction between electrons. A higher bond order also means that the atoms are held together more tightly.
Description : Water gas is a mixture of (A) CO2 and O2 (B) O2 and H2 (C) H2, N2 and O2 (D) CO, N2 and H2.
Last Answer : CO, N2 and H2.
Description : Which of the following gases will effuse out of football bladder most quickly ? (1) He (2) H2 (3) N2 (4) O2
Last Answer : H2
Description : Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 ⇌ 2NH3 . (A) Increases (B) Decreases (C) Remains unchanged (D) Unpredictable from the data
Last Answer : (A) Increases
Description : For the reversible exothermic reaction, N2 + 3H2 ⇌ 2NH3, increase of pressure would (A) Shift the equilibrium towards right (B) Give higher yield of NH3 (C) Both (B) and (C) (D) Neither (A) nor (B)
Last Answer : (C) Both (B) and (C)
Description : Photorespiration is favoured by (a) high temperature and low O2 (b) high humidity and temperature (c) high O2 and low CO2 (d) high CO2 and low O2.
Last Answer : (c) high O2 and low CO2
Description : Identify the substances that are oxidised and the substances which are reduced in the following reactions. (i) 4Na(s) + O2(g) → 2Na2O(s) (ii) CuO (s) + H2(g) → Cu (s) + H2O(l) -Chemistry-10
Last Answer : (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen.
Description : (a) What are fuel cells? Explain the electrode reactions involved in the working of H2 – O2 fuel cell. (b) Represent the galvanic cell in which the reaction Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s) takes place. -Chemistry
Last Answer : (a) Fuel cells : These cells are the devices which convert the energy produced during combustion of fuels like H2, CH4, etc. directly into electrical energy. The electrode reaction for H2 – O2 fuel cell : (b) The galvanic cell may be represented as Zn (s) | Zn2+ (1M) || Cu2+ (1M) | Cu (s)
Description : What of the following reactions demonstrates a synthesis reaction A) Mg plus H2SO4 and gt MgSO4 plus H2 B) 2NaCl and gt 2Na plus Cl2 C) C plus O2 and gt CO2 D) Zn plus 2HCl and gt ZnCl2 plus H2?
Last Answer : C+O2 →CO2
Description : The ammonia synthesis reaction represented by N2 + 3H2 ⇌ 2NH3; ΔH = - 22.4 kcal, is (A) Endothermic (B) Exothermic (C) Isothermal (D) Adiabatic
Last Answer : (B) Exothermic
Description : The reactions of high molecularity are rare, because (A) Of very large activation energy of many bodies (B) Of low probability of many body collisions (C) Many body collisions are not favoured energetically (D) Of requirement of very large concentration for such reactions
Last Answer : (B) Of low probability of many body collisions
Description : Consider the reaction, C + O2 ⇌ CO2; ΔH = - 94 kcal. What will be the value of ΔH for the reaction CO2 → C + O2? (A) -94 kcal (B) +94 kcal (C) > 94 kcal (D) < -94 kcal
Last Answer : (B) +94 kcal
Description : What is Y in the following reactions `C_(2)H_(5)I+NaOC_(2)H_(5) rarrX+Nal` `X+2HI rarr 2Y+H_(2)O`
Last Answer : What is Y in the following reactions `C_(2)H_(5)I+NaOC_(2)H_(5) rarrX+Nal` `X+2HI rarr 2Y+H_(2)O` A. `C_(2) ... C_(2)H_(4)` D. `C_(2)H_(5)OC_(2)H_(5)`
Description : Kopper-Totzek coal gasifier (A) Can give ammonia synthesis gas (H2 + N2 ) (B) Is a moving bed reactor (C) Cannot use coking coal (D) Operate at very high pressure
Last Answer : (A) Can give ammonia synthesis gas (H2 + N2 )
Description : In the reversible reaction of the type, A + B ⇌ AB, in general (A) Both forward and backward reactions will be exothermic (B) Neither of the reactions will be endothermic (C) ... will be endothermic (D) The combination reaction will be endothermic, while the dissociation reaction will be exothermic
Last Answer : (C) The combination reaction will be exothermic, while the dissociation reaction will be endothermic
Description : Separation of __________ employs gaseous diffusion process. (A) N2 and O2 from air (B) Isotopes of uranium (C) Isotopes of helium (D) SO2 and air
Last Answer : (B) Isotopes of uranium
Description : If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as (A) O2 (B) CO (C) N2 (D) SO2
Last Answer : (D) SO2
Description : A sample of natural gas containing 80% methane (CH4 ) and rest nitrogen (N2 ) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is (A) CO2 : 6 ... 96, N2 :72.06 (D) CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74
Last Answer : (B) CO2 : 7.42, CO : 1.86, O2 : 4.64, N2 :86.02
Description : The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be (A) 27.6 (B) 23 (C) 47.3 (D) 42.9
Last Answer : (B) 23
Description : Volumetric ratio of N2 to O2 in dry atmospheric air is (A) 0.21 (B) 3.76 (C) 4.76 (D) 0.79
Last Answer : (B) 3.76
Description : Argon is the third largest constituent of air (followed by N2 & O2 ). Its percentage by volume in air is (A) 0.14 (B) 0.34 (C) 0.94 (D) 1.4
Last Answer : (C) 0.94
Description : Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that (A) Pure oxygen has been used for combustion ... very high (C) Excess air has been used for combustion (D) Hydrogen is not present in the fuel
Last Answer : (C) Excess air has been used for combustion
Description : Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the (A) Low pressure and high temperature (B) Low pressure and low temperature (C) High pressure and low temperature (D) High pressure and high temperature
Last Answer : (B) Low pressure and low temperature
Description : Which of the following gases has very high neutron capture crosssection, making it unsuitable as a coolant in nuclear reactor? (A) N2 (B) He (C) CO2 (D) H2
Last Answer : (A) N2
Description : Which is used as a coolant in nuclear reactor due to its high capture cross-section? (A) H2 (B) N2 (C) He (D) CO2
Last Answer : (A) H2
Description : Protective gas used in the annealing furnace for steel coil comprises of (A) 95% N2 + 5% H2 (B) 5% H2 + 9% N2 (C) 100% CO (D) 100% H2
Last Answer : (A) 95% N2 + 5% H2
Description : The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be (A) y (B) 0.95 y (C) 1.05 y (D) 1.8 y
Last Answer : (A) y
Description : . Water gas constitutes mainly of (A) CO & H2 (B) CO & N2 (C) CO2 & H2 (D) CH4 & H2
Last Answer : (A) CO & H2
Description : Largest constituent of blast furnace gas is (A) N2 (B) CO (C) CO2 (D) H2
Description : Producer gas comprises mainly of (A) CO & N2 (B) CO & H2 (C) CO2 & N2 (D) CO2 & H2
Last Answer : (A) CO & N2