Description : Consider the following changes: 1. Curdling of milk 2. Sublimation of camphor 3. Drying of paint 4. Oxidation of SO2 to SO3 The chemical changes are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only
Last Answer : Ans:(b)
Description : During manufacture of H2SO4 , the oxidation of SO2 to SO3 by oxygen is an endothermic reaction. The yield of SO3 will be maximised, if the (A) Temperature is increased (B) Pressure is reduced (C) Temperature is increased and pressure is reduced (D) Temperature is reduced and pressure is increased
Last Answer : (D) Temperature is reduced and pressure is increased
Description : In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a __________ reaction. (A) Non-catalytic homogeneous (B) Non-catalytic heterogeneous (C) Catalytic homogenous (D) Catalytic heterogeneous
Last Answer : (C) Catalytic homogenous
Description : At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system). (A) P (B) √P (C) P (D) 1/P
Last Answer : (B) √P
Description : How many atoms in 4 al2(so3)3?
Last Answer : Need answer
Description : Is SO3 an acid or base?
Last Answer : Sulfur trioxide is an acidic oxide.
Description : so3 is an empirical formula for which of the following A. so4B.s2o6C.s4o2D.s2o3?
Last Answer : B. s2o6
Description : How would the equilibrium change if NO2 were added to SO2(g)+NO2(g)=NO(g)+SO3(g)+heat?
Last Answer : The amount of NO and SO3 would increased.
Description : Mark the compound which possesses ionic, covalent and coordinate bonds. (1) NH4C1 (2) SO3 (3) SO2 (4) H2O
Last Answer : (1) NH4C1 Explanation: Ammonium chloride (NH4Cl) is generally considered as an ionic compound but this compound has three different types of bond.
Description : SO3 is absorbed using H2SO4 in a (A) Cast iron packed tower (B) Stainless steel plate tower (C) Packed steel tower lined with acid proof bricks (D) None of these
Last Answer : (C) Packed steel tower lined with acid proof bricks
Description : In SO3 absorber (Contact Process), packing material used is of (A) Cast iron (B) Chemical stoneware (C) Karbate (D) Mild steel
Last Answer : (B) Chemical stoneware
Description : Acid rain is due to increase in atmospheric concentration of (a) ozone and dust (b) CO2 and CO (c) SO3 and CO (d) SO2 and NO2
Last Answer : (d) SO2 and NO2.
Description : Acid rain is due to increase in atmospheric concentration of (a) ozone and dust (b) CO2 and CO (c) SO3 and CO (d) SO2 and NO2.
Description : Acid rain is caused by increase in the atmospheric concentration of (a) CO2 and CO (b) O3 and dust (c) SO2 and NO2 (d) SO3 and CO.
Last Answer : (c) SO2 and NO2
Description : Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases. (A) Reduce SO2 content in (B) Catalytically convert SO2 to SO3 in (C) Increase the dew point of (D) None of these
Last Answer : (A) Reduce SO2 content in
Description : Main pollutants released from iron & steel industry is (A) CO, CO2 & SO2 (B) H2S, NO & SO3 (C) CO2 , H2S & NO2 (D) SO3 , NO2 & CO2
Last Answer : (A) CO, CO2 & SO2
Description : Main pollutants released from petroleum refineries is (A) CO, SO2 & H2S (B) CO2 , NO & SO3 (C) CO2 , H2S & NO2 (D) SO3 , NO2 & CO2
Last Answer : (A) CO, SO2 & H2S
Description : Which of the following pollutants is absent in the emissions from a fertiliser plant? (A) SO2 & SO3 (B) NO2 (C) NH3 (D) CO
Last Answer : (D) CO
Description : Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect? (A) CO2 (B) H2 (C) SO3 (D) N2
Last Answer : (C) SO3
Description : If helium is introduced in a reactor containing O2 , SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 ( ... 's principle). (A) Decreases (B) Increases (C) Remains unaltered (D) Changes unpredictably
Last Answer : (A) Decreases
Description : The catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between (A) 2-5 % (B) 7-10 % (C) 12-15 % (D) 20-25 %
Last Answer : (B) 7-10 %
Description : Which of the following reagents will react with furan to form 2-furansulfonic acid? (a) SO3 in pyridine at 100°C (b) Dilute H2SO4 at 200°C (c) SO2 at 100°C (d) Dilute H2SO4 at 100°C
Last Answer : SO3 in pyridine at 100°C
Description : Absorption of SO3 in 97% H2SO4 is (A) Exothermic (B) Endothermic (C) Not possible (D) None of these
Last Answer : (A) Exothermic
Description : Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent. (A) 80 (B) 90 (C) 98 (D) 100
Last Answer : (C) 98
Description : Which is the most efficient absorbent for SO3 out of the following? (A) 20% oleum (B) 65% oleum (C) 78% H2SO4 (D) 98% H2SO4
Last Answer : (D) 98% H2SO4
Description : 10% oleum comprises of 10% free (A) SO2 (B) H2SO3 (C) SO3 (D) H2SO4
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 : Pick out the wrong statement. (A) Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98% (B) The chemical formula of oleum is H2S2O7 , which is formed by saturating ... but technical sulphuric acid (D) Decomposition of sulphuric acid on heating does not start before its boiling
Last Answer : (D) Decomposition of sulphuric acid on heating does not start before its boiling
Description : More than 100 percent of __________ is present in oleum. (A) SO3 (B) H2SO4 (C) H2SO3 (D) SO2
Last Answer : (B) H2SO4
Description : Which of the following is an endothermic reaction? (A) Absorption of SO3 in 98% H2SO4 (B) C + H2O = CO + H2 (C) Thermal dissociation of iron pyrites (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : . Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water. (A) SO3 (B) Cl2 (C) NH3 (D) SO2
Last Answer : (B) Cl2
Description : Sulphuric acid saturated with SO3 is called (A) Concentrated H2SO4 (B) Sulphurous acid (C) Oleum (D) None of these
Last Answer : (C) Oleum
Description : Multistage catalytic converter is not used in the (A) Conversion of SO2 to SO3 (B) NH3 synthesis reaction (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (B) NH3 synthesis reaction
Description : Oleum produces fumes of (A) SO2 (B) H2SO4 (C) SO3 (D) SO2 + H2SO4
Description : . In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because (A) SO3 gas is sparingly soluble in water (B) Water forms an acid mist, which is difficult to absorb (C) The purity of acid is affected (D) Scale formation in the absorber is to be avoided
Last Answer : (B) Water forms an acid mist, which is difficult to absorb
Description : 20% oleum means that in 100 kg oleum, there are 20 kg of (A) SO3 and 80kg of H2SO4 (B) H2SO4 and 80kg of SO3 (C) SO3 for each 100 kg of H2SO4 (D) None of these
Last Answer : (A) SO3 and 80kg of H2SO4
Description : Which of the following is a primary pollutant in atmospheric air? A. Cl2 B. SO3 C. Nitrates D. Sulphates
Last Answer : A. Cl2
Description : If the temperature is increased the amount of SO3(g) produced will: A increase. B decrease. C remain the same.
Last Answer : B decrease.
Description : How many resonance forms are possible for the Lewis structure of SO3?
Last Answer : ANSWER: 3
Description : When conc. H2 SO4 is added to dry KNO3 , brown fumes are evolved. These fumes are due to (1) SO3 (2) SO2 (3) NO2 (4) N2O
Last Answer : NO2
Description : Assertion :- Oxidation number of `S` in `HSO_(3)^(-)` is `+4`. Reason :- Sulphur is in different oxidation state in different compounds.
Last Answer : Assertion :- Oxidation number of `S` in `HSO_(3)^(-)` is `+4`. Reason :- Sulphur is in ... Reason is False. D. If both Assertion & Reason are False.
Description : STATEMENT-1: The oxidation state of S in `H_(2)S_(2)O_(8)` is 6. STATEMENT-2: Maximum oxidation state of A is 6 because the maximum oxidation state of
Last Answer : STATEMENT-1: The oxidation state of S in `H_(2)S_(2)O_(8)` is 6. STATEMENT-2: Maximum ... D. Statement-I is not correct and Statement-II is correct