. 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

1 Answer

Answer :

(B) Water forms an acid mist, which is difficult to absorb

Related questions

Description : Absorption of SO3 in 97% H2SO4 is (A) Exothermic (B) Endothermic (C) Not possible (D) None of these

Last Answer : (A) Exothermic

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 : For absorbing a sparingly soluble gas in a liquid (A) Gas side mass transfer co-efficient should be increased (B) Liquid side mass transfer co-efficient should be increased (C) Liquid side mass transfer co-efficient should be decreased (D) Mass transfer co-efficient must be kept constant

Last Answer : (B) Liquid side mass transfer co-efficient should be increased

Description : Co-current absorbers are usually used when the gas to be dissolved in the liquid is (A) Sparingly soluble (B) Highly soluble (C) A pure substance (D) A mixture

Last Answer : (C) A pure substance

Description : For absorbing a sparingly soluble gas in a liquid, the (A) Gas side co-efficient should be increased (B) Liquid side coefficient should be increased (C) Gas side co-efficient should be decreased (D) Liquid side co-efficient should be decreased

Last Answer : (B) Liquid side coefficient should be increased

Description : When the gas to be dissolved in liquid is a/an __________ then normally co-current adsorber are used. (A) Mixture of two gases (B) Pure gas (C) Ideal gas (D) Sparingly soluble gas

Last Answer : (B) Pure gas

Description : Indirect contact heat exchangers are preferred over direct contact heat exchangers, because (A) Heat transfer co-efficient are high (B) There is no risk of contamination (C) There is no mist formation (D) Cost of equipment is lower

Last Answer : (B) There is no risk of contamination

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 : 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 : `A_(3)B_(2)` is a sparingly soluble salt with molar mass `M(gmol_(-))` and solubility `x` gm `litre_(-1)`, the ratio of the molar concentration of `B^

Last Answer : `A_(3)B_(2)` is a sparingly soluble salt with molar mass `M(gmol_(-))` and solubility `x` gm `litre_(-1)`, the ... `(1)/(54)(M^(4))/(x^(4))` D. None

Description : Give an example of sparingly soluble salt?

Last Answer : Ans. AgCl

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 : 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

Last Answer : (C) SO3

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 : Oleum produces fumes of (A) SO2 (B) H2SO4 (C) SO3 (D) SO2 + H2SO4

Last Answer : (C) SO3

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 : Conversion achieved in HNO3 synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by (A) Decreasing the pressure (B) Decreasing the temperature (C) Increasing the temperature (D) None of these

Last Answer : (C) Increasing the temperature

Description : H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S ... by, y = 5x + 0.001 is (A) 2.0 (B) 1.56 (C) 1.0

Last Answer : (A) 2.0

Description : Contact process of sulphuric acid manufacture (A) Yields acid of higher concentration than chamber process (B) Yields acids of lower concentration than chamber process (C) Is obsolete (D) Eliminates absorber

Last Answer : (A) Yields acid of higher concentration than chamber process

Description : 1. How can a Change in distribution of powers between the Centre and the States be done? 2. Which acid is used to remove ink and rust stains and cloth? 3. Which forms the largest share of deficit ... ? 19. Which states is the leading producer of tea? 20. Who was a contemporary of Chinghiz Khan?

Last Answer : Answer : 1. Amending the Constitution 2. Oxalic acid 3. Fiscal deficit 4. 5 km 5. Government of India Act, 1919 6. Ben Okri 7. Nucleolus 8. 73rd 9. East Africa 10. Lichhavi 11. By observing ... Indus and Jhelum 16. Cytochromes 17. From the date of its first meeting 18. Silver 19. Assam 20. Iltutmish

Description : (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn Explanation: Water is not effective in extinguishing a fire caused by petrol because water and ... . Water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.

Last Answer : "All the four quantum numbers of two electrons in an atom are not the same." It is the law of (1) Hund’s (2) Exclusion Principle of Pauli (3) Uncertainty Principle of Giesenberg (4) Avogadro’s law

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 : In the manufacture of ortho-phosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesirable (A) CaSO4 .½ H2O and CaSO4 crystals (B) Pyrophosphoric acid (C) Meta-phosphoric acid (D) All (A), (B) and (C)

Last Answer : (A) CaSO4 .½ H2O and CaSO4 crystals

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 : Outside of cooking utensils are generally left black from below because – (1) it is difficult to clean daily. (2) black surface is a good conductor of heat. (3) black surface is a poor conductor of heat. (4) black surface is a good absorber of heat.

Last Answer : (4) black surface is a good absorber of heat. Explanation: The outside surface of a utensil used for heating is coated black so that it may absorb more heat and make heating quicker. This is because black surface is a good absorber of heat.

Description : Outside of cooking utensils are generally left black from below because (1) it is difficult to clean daily. (2) black surface is a good conductor of heat. (3) black surface is a poor conductor of heat. (4) black surface is a good absorber of heat.

Last Answer : black surface is a good absorber of heat.

Description : Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure metal.

Last Answer : Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure ... Statement-1 is false but Statement -2 is true

Description : Nitric acid is produced on commercial scale in a fertiliser plant by (A) Oxidation of ammonia (B) CaNO3 + H2SO4 reaction (C) Passing air through high voltage electric arc (D) None of these

Last Answer : (A) Oxidation of ammonia

Description : Folic acid: a. is water soluble b. is absorbed in the stomach c. deficiency leads to aplastic anaemia d. deficiency occurs with methatrexate treatment

Last Answer : is water soluble

Description : In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio ... increases (C) (i) increases (ii) increases (D) (i) decreases (ii) decreases

Last Answer : (B) (i) decreases (ii) increases

Description : The chamber process is (A) Preferred over contact process for producing 98 to 100% H2SO4 and various oleums (B) Non-catalytic and operates only on pyrites (C) A batch process for directly producing high strength (98 to 100%) H2SO4 (D) None of these

Last Answer : (D) None of these

Description : The purity of `H_(2)SO_(4)` obtained by contact process is

Last Answer : The purity of `H_(2)SO_(4)` obtained by contact process is A. `96-98%` B. `92-96%` C. `92-94%` D. `100%`

Description : Pick out the correct statement about catalytic polymerisation. (A) H2SO4 polymerisation process gives gasoline rich in unsaturates (B) In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive (C) Both (A) and (B) (D) Neither (A) nor (B

Last Answer : (B) In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive

Description : Highly soluble herbicides like 2,4-D salt, Dalapon and TCA have to be avoided in which of the soil type a). Peat b). Red c). Clay d). Sandy

Last Answer : d). Sandy

Description : Glass is soluble in - (1) H2SO4 (2) HCIO4 (3) HNO3 (4) HF

Last Answer : (4) HF Explanation: Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. Its ability to dissolving lass has been known since the 17th century. It is a solution of hydrogen fluoride in water and is represented by HF.

Description : The basic underlying principle of using a mist propagation system is that it: a. Keeps the propagation medium uniformly moist and supplies moisture to the base of the cuttings b. ... medium to promote root formation and development d. Increases humidity around the cutting and reduces transpiration

Last Answer : Increases humidity around the cutting and reduces transpiration

Description : Expert power is the power that comes from the amount of knowledge a person has obtained in  a specific area. This type ofpower is: 1. Critical to a project manager because the PM has to have ... by the PM because the PM cannot stay current on all areas of  expertise and also manage the project

Last Answer : 4. Used sparingly if at all by the PM because the PM cannot stay current on all areas of  expertise and also manage the project

Description : When soldering a printed circuit board component, you should be careful to prevent damage by _________. A. quickly heating the joints, using a high wattage iron B. using the soldering iron tip sparingly C. using only acid cord solder D. applying mechanical pressure to the joints being soldered

Last Answer : Answer: B

Description : Lead is (A) Not resistant to corrosion (B) Used as a cathodic material (C) Not used as pigment (in its compound forms) for paints (D) Used as a shock absorber (in mattress form) between the foundation and steel framework of skyscraper buildings

Last Answer : (D) Used as a shock absorber (in mattress form) between the foundation and steel framework of skyscraper buildings

Description : How many resonance forms are possible for the Lewis structure of SO3?

Last Answer : ANSWER: 3

Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.

Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum

Description : In the manufacture of H3 PO4 (ortho); strong H2 SO4 leaching wet process as compared to electric furnace process (A) Uses lower grade phosphate rock (B) Requires lower capital investment in the plant (C) Produces lower purity acid (D) Is very costly

Last Answer : (C) Produces lower purity acid

Description : Sulphuric acid mist is arrested by using a __________ scrubber. (A) Packed wet (B) Hollow wet (C) Venturi (D) Co-current

Last Answer : (C) Venturi

Description : Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2 . Lead pipes are readily corroded by (A) Dilute HCI (B) Acetic acid (C) Concentrated H2SO4 (D) None of these

Last Answer : (B) Acetic acid

Description : Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2 . Lead pipes are readily corroded by (A) Dilute HCl (B) Acetic acid (C) Concentrated H2SO4 (D) None of these

Last Answer : (B) Acetic acid