302 + Interview Questions in Inorganic Chemical Industries in Chemical Technology Page 3 InterviewSolution

101.	How liquid NH3 fertilizer can be produced?(a) By the gypsum process(b) By fauser process(c) By solvay process(d) From NH3 and HCLI got this question in an online quiz.This is a very interesting question from Inorganic Chemical topic in portion Inorganic Chemical Industries of Chemical Technology
Answer» The correct answer is (a) By the gypsum process Explanation: Liquid NH3 FERTILIZER can be produced from gypsum process by DOUBLE decomposition with AMMONIUM nitrate. Solvay process and NH3-HCL are used to produce ammonium chloride which contains 24% NITROGEN.

Discussion

102.	Presence of which of the following enables ammonium nitrates to produce toxic fumes even after the initial fire is removed?(a) Bromides(b) Nitrates(c) Chlorides(d) OxidesI have been asked this question in class test.The doubt is from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» The CORRECT answer is (c) Chlorides The explanation is: Some types of ammonium NITRATES containing a small amount of chlorides (e.g., Potassium Chlorides) undergo self-sustaining DECOMPOSITION. This spreads throughout the MASS to PRODUCE toxic fumes.

Discussion

103.	Which one is the highest end use for ammonia?(a) Urea(b) Nitric acid(c) Direct application as fertilizer(d) AcrylonitrileThis question was posed to me in a national level competition.This interesting question is from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» The correct answer is (c) Direct application as FERTILIZER To EXPLAIN I WOULD say: The end uses for ammonia WORLDWIDE are as follows direct application as fertilizer- 25%, UREA- 21%, nitric acid-12% and acrylonitrile – 3%.

Discussion

104.	What is the temperature range at which the preheated gas flows through the inside of tube, which contains promoted iron catalyst?(a) 450-500 Celsius(b) 500-550 Celsius(c) 550-600 Celsius(d) 400-600 CelsiusI have been asked this question in an online quiz.This intriguing question originated from Inorganic Chemical in portion Inorganic Chemical Industries of Chemical Technology
Answer» The CORRECT answer is (b) 500-550 CELSIUS Best explanation: The preheated gas flows NEXT through the inside of the tube, which contains promoted porous IRON catalyst at 500-550 Celsius.

Discussion

105.	Which oxygen is used for blast furnace operations?(a) High purity oxygen(b) Low purity oxygen(c) Atmospheric oxygen(d) Liquid oxygenThis question was addressed to me in an international level competition.I'm obligated to ask this question of Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology
Answer» Correct answer is (b) LOW purity OXYGEN The explanation: Low purity oxygen is USED for BLAST FURNACE operations.

Discussion

106.	Which of the mentioned deals with various forms of energy?(a) Electrochemistry(b) Thermodynamics(c) Material Sciences(d) Organic chemistryThe question was posed to me by my college professor while I was bunking the class.The query is from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology
Answer» Right choice is (b) Thermodynamics To explain I WOULD say: Thermodynamics is the STUDY of energy (heat) TRANSFER and its DYNAMICS, whereas the others mentioned doesn’t deal with energy in any way.

Discussion

107.	In which type of burning process of solid propellants usually a solid grain is used?(a) Progressive burn(b) Digressive burn(c) Neutral burn(d) Natural burnThis question was addressed to me in an interview for job.The doubt is from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» Correct answer is (b) DIGRESSIVE burn Easiest explanation: In digressive burn of solid propellants usually a solid grain in the SHAPE of a CYLINDER or sphere is used. In progressive burn usually a grain with MULTIPLE perforations or a STAR cut in the centre providing a lot of surface area is used.

Discussion

108.	The gas produced in the side reaction of ammonia-sodium hypochlorite process is _________(a) H2(b) N2(c) Cl2(d) O2I have been asked this question by my school principal while I was bunking the class.Origin of the question is Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology
Answer» The correct choice is (b) N2 Easy explanation: The side REACTION of ammonia-sodium HYPOCHLORITE PROCESS is 2NH2Cl+N2H4 →2NH4Cl+N2, HENCE the gas produced is nitrogen.

Discussion

109.	Which of the following have lowest percentage of uranium present in them?(a) Pitchblende(b) Monazite sands(c) Carnotite(d) Phosphate rock inclusionsThis question was addressed to me in quiz.My query is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The correct option is (d) Phosphate rock INCLUSIONS The EXPLANATION: The percentage of uranium in PITCHBLENDE is 1 – >10%U, in Carnotite is 0.1-0.5%U, in monazite sands is 0.25%U, in phosphate rock inclusions is 0.01-0.03%U.

Discussion

110.	Why fluidized bed is used in Uranium gaseous conversion process?(a) Good heat transfer(b) Low turbulent mixing(c) Production of low bulk density(d) Batch processingI had been asked this question in semester exam.My doubt is from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT option is (a) Good heat transfer Explanation: Fluidized beds are fluid-solid SYSTEM in which the solid is maintained in suspension by gas flowing through a VERTICAL reactor. It provides good heat transfer and internal heat exchanger surfaces permit high PRODUCTION rates in continuous PROCESSING.

Discussion

111.	Which material is used to purify ThO2?(a) Butyl phosphate(b) NaOH leaching(c) Butyl triphosphate(d) Acid leachingThis question was addressed to me in quiz.This interesting question is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The correct choice is (a) BUTYL phosphate Best EXPLANATION: ThO2 can be purified with tertiary butyl phosphate in a similar MANNER as for U3O8.NaOH leaching is used to satisfactorily EXTRACT ThO2 from MONAZITE.

Discussion

112.	Why moderators are used in nuclear process?(a) To absorption of neutrons(b) To increase the reaction rate(c) To provide collision(d) To increase the temperatureThe question was asked in an internship interview.Enquiry is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» Correct option is (a) To absorption of NEUTRONS Easiest explanation: Moderating materials are required if the absorption of neutrons is to TAKE PLACE at or near the ENVIRONMENTAL temperature of the reactor. The fission neutrons liberated are extremely high energy and must be moderated to environment temperature by non-absorption type collision with moderating materials.

Discussion

113.	In which types of conditioning process, synthetic resins are used?(a) Lime-soda process(b) Chlorination(c) Ion-exchange(d) DeodorizationThis question was addressed to me by my school teacher while I was bunking the class.The above asked question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT OPTION is (c) Ion-exchange To explain I would say: ; Synthetic resins are used for cation or anion exchange in ion-exchange PROCESS of conditioning process. Activated carbon ADSORPTION is DONE in decolorization and deodorization.

Discussion

114.	Which type of cement is used for brick mortar composition?(a) Portland cement(b) High alumina(c) Hydraulic lime(d) PozzolanaThe question was posed to me in semester exam.My question is from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology
Answer» The correct choice is (c) Hydraulic lime For explanation I WOULD SAY: Hydraulic lime is used only for brick mortar composition, low price and STRENGTH. Pozzolana cement is mixture of VOLCANIC ash, BURNT clay or shale in 2-4 parts with hydrated lime.

Discussion

115.	Oil and gas deposits are found in ________ region.(a) ocean beaches(b) sub-sea floor rocks(c) continental shelves(d) deep sea floorI had been asked this question in class test.I'm obligated to ask this question of Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology
Answer» The correct choice is (B) sub-sea floor rocks Explanation: OIL and gas deposits are found in sub-sea floor rock region along with sulfur, iron ore, salt, COAL ETC. OCEAN beaches have platinum, gold, diamond, quartz etc.

Discussion

116.	Which of the following is not a requirement for membrane separators?(a) Good mechanical properties(b) Long term stability(c) High electrical resistance(d) Durability under required conditionsI had been asked this question in semester exam.Query is from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology
Answer» Right choice is (C) High ELECTRICAL RESISTANCE The explanation is: Membrane separators should have Long term stability and good MECHANICAL properties for practical USE. They must also have low electrical resistance, durability under required conditions.

Discussion

117.	Steps involved in formation of adiponitrile are _______(a) Benzene → adipic acid → cyclohexane → adiponitrile(b) Cyclohexane → benzene → adipic acid → adiponitrile(c) Benzene → cyclohexane →adipic acid → adiponitrile(d) Cyclohexane → adipic acid → benzene → adiponitrileThis question was addressed to me in examination.My enquiry is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT option is (c) Benzene → cyclohexane →adipic ACID → adiponitrile Easiest explanation: Benzene on reduction gives cyclohexane, which further t forming adipic acid. Adipic acid on dehydration in PRESENCE of ammonia forms an AMIDE which on dehydration produces adiponitrile.

Discussion

118.	Which one of the following is the structure of hexa Meta phosphate? X represents monovalent alkali metal.(a) X5P3O10(b) (XPO3)6(c) PO4^-3(d) X4P2O7∙YH2 OThe question was posed to me in an international level competition.My doubt stems from Inorganic Chemical topic in portion Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT CHOICE is (b) (XPO3)6 To explain: The structure of META phosphate is PO3^–, on combining X and PO3^– we get XPO3. Hence hexa Meta phosphate structure is (XPO3)6.

Discussion

119.	Which operation mentioned below is associated with Claude cycle?(a) External refrigeration(b) Three- stage cascade cycle(c) High-speed expander(d) Low speed expanderI have been asked this question in final exam.My query is from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» The correct answer is (c) High-speed expander The best explanation: In the Claude cycle, a fraction of the gas is expanded in a high speed expander. External refrigeration and THREE- stage CASCADE cycle is RELATED with CASCADES cycle.

Discussion

120.	What are the basic raw materials for manufacture of sulfuric acid?(a) Sulfur and pyrites(b) Oxygen(c) Hydrogen(d) NitrogenI had been asked this question by my college director while I was bunking the class.The query is from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» The correct option is (a) Sulfur and pyrites The best I can explain: 85 to 95% SULFURIC acid is PRODUCED by mining and commercial oxidization of 80 to 90% sulfur containing and 10 to 15% pyrates containing raw materials. Nitrogen is used as raw materials in the PRODUCTION of ammonia, nitric acid etc.

Discussion

121.	What is the molecular weight of Oxygen?(a) 30(b) 31(c) 32(d) 33This question was addressed to me by my school teacher while I was bunking the class.I'd like to ask this question from Inorganic Chemical in division Inorganic Chemical Industries of Chemical Technology
Answer» Correct CHOICE is (c) 32 Explanation: ATOMIC weight of Oxygen is 16, THEREFORE the weight of O2 MOLECULE is 2(16) = 32.

Discussion

122.	In nitric acid concentration by H2SO4 which equipment is used for concentrating purpose?(a) Stoneware towers(b) Dehydrating tray towers(c) cooling towers(d) Chilling towersI got this question in an interview for job.This key question is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» Correct option is (a) Stoneware towers Explanation: In concentration by H2SO4 process, rectification by 93% can be obtain in silicon-iron or stoneware towers PRODUCES CONCENTRATED nitric ACID and 75% concentrated H2SO4 which can be re-evaporated to 93%.

Discussion

123.	What is the undesirable product in urea production?(a) Ammonium carbonate(b) Biuret formation(c) Liquid NH3(d) Flakes formationI had been asked this question in a job interview.Origin of the question is Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» RIGHT answer is (B) Biuret formation Explanation: In UREA production, ammonium carbonate get decomposes and formed biuret which is the undesirable product increases the SEPARATION cost, flakes formed in the ammonium nitrate production.

Discussion

124.	Specific reaction rate constant is denoted by _______(a) k(b) K(c) R(d) GI have been asked this question in class test.My question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» Correct ANSWER is (a) k The explanation is: Specific RATE constant for a reaction is denoted with k. R is used to denote UNIVERSAL gas constant. G is used to denote Gibb’s free energy. K is used to denotes MANY parameters like TEMPERATURE in Kelvin scale, Equilibrium rate constant etc.

Discussion

125.	Nitromethane is which type of propellants?(a) Monopropellants(b) Bipropellant(c) Solid propellants(d) Liquid propellantsThis question was posed to me in a job interview.The above asked question is from Inorganic Chemical in division Inorganic Chemical Industries of Chemical Technology
Answer» Right OPTION is (d) Liquid propellants The EXPLANATION: Liquid propellants are two types- homogeneous and compound. Nitromethane and ethyl NITRATE COMES under the CATEGORIES of homogeneous liquid propellants and liquid ammonia, ammonium nitrate comes in compound propellants.

Discussion

126.	Which of the following reaction is wrong?(a) Na+H →NaH(b) 2B5H9→B10H14 + 2H2(c) 3CH3OH + H3BO3→B(OCH3)3 + 3H2O(d) 3NaBH4 + BI3 →2B2H6 + 3NaIThe question was asked in an international level competition.The above asked question is from Inorganic Chemical in division Inorganic Chemical Industries of Chemical Technology
Answer» The CORRECT CHOICE is (d) 3NaBH4 + BI3 →2B2H6 + 3NaI Easiest explanation: 3NaBH4 + BI3→2B2 H6 + 3NaI is wrong because sodium BOROHYDRIDE can REACT only with boron tri fluoride or boron tri chloride but not with boron tri iodide or boron tri bromide.

Discussion

127.	Which grade hydrogen is used in production of boranes?(a) Zero grade(b) Ultra high purity grade(c) Industrial grade(d) Research gradeI got this question during a job interview.This key question is from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology
Answer» Correct choice is (c) INDUSTRIAL grade Explanation: Industrial grade hydrogen is used in the production of BORANES. It REACTS with sodium metal to form sodium HYDRIDE which is used for producing sodium BOROHYDRIDE.

Discussion

128.	Which gas is used for shipping anhydrous hydrazine?(a) Nitrogen(b) Nitric oxide(c) Oxygen(d) ChlorineI have been asked this question during an interview for a job.The question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The correct option is (a) Nitrogen To ELABORATE: Nitrogen GAS is used for SHIPPING anhydrous hydrazine in stainless steel drums. A little bit of Organic INHIBITOR is added for providing stability.

Discussion

129.	In which form C4 explosives are appeared?(a) Colourless crystal(b) Odorless(c) Smells like motor oil(d) Dyed pink powderI got this question during an interview for a job.This interesting question is from Inorganic Chemical in portion Inorganic Chemical Industries of Chemical Technology
Answer» Correct answer is (c) Smells like MOTOR oil To explain I would say: C4 explosives are appeared in -smells like motor oil, LIGHT brown putty like substance. HMX explosives are appeared in the form of colourless crystal or ODORLESS and dyed PINK POWDER.

Discussion

130.	Which type of reaction – UO2 + 4C -> UC2 + 2CO(a) Uranium metal fuel elements(b) Reduction with alkali(c) Uranium carbide(d) EnrichmentThis question was posed to me in final exam.I'd like to ask this question from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» RIGHT choice is (c) URANIUM carbide Easiest explanation: This REACTION is uranium carbide reaction. Due to the reaction between uranium OXIDE and carbon, uranium carbide is formed which is also PREFERABLE to uranium metal from a stability standpoint.

Discussion

131.	Soda ash leaching’ comes into the picture in which type of removal of non-uranium constituents?(a) Ion exchange following acid leach(b) Leaching(c) Solvent extraction(d) SeparationI had been asked this question in a job interview.This question is from Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology
Answer» Right option is (b) Leaching The explanation is: REMOVAL of non-uranium constituents is done by leaching, ION exchange following ACID leach and solvent extraction. Acid leach on low limestones ores, salt roast, soda ASH leach -these are COMES under the leaching process.

Discussion

132.	CaO(s) + H2O -> Ca(OH)^2-where this chemical reaction occur?(a) Calcination limestone(b) Portland cement production(c) Cement rock beneficiation(d) Hydrated limeThe question was asked in an international level competition.I'd like to ask this question from Inorganic Chemical in portion Inorganic Chemical Industries of Chemical Technology
Answer» Correct option is (d) HYDRATED lime Easiest explanation: In hydrated lime process, quicklime reacts with water and the PRODUCT from this complete reaction is light, dry SLAKED lime which is classified by SCREEN or air separators to REMOVE any overburned lime that did not hydrated.

Discussion

133.	Why cement beneficiation is done?(a) To remove silica and iron content(b) To remove silica and aluminum content(c) To remove silica and sulfur content(d) To remove silica and magnesium contentI had been asked this question in semester exam.My doubt is from Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology
Answer» The correct answer is (a) To remove silica and iron content To explain I WOULD say: MUCH of the locally AVAILABLE limestone has too high a silica and iron content for direct use in cement manufacture. These undesirable constituents can be removed by ore dressing or beneficiation METHODS which are based on fluid mechanics and adsorption.

Discussion

134.	”Major difficulty is in removing the ore from the seafloor to the deck” -where it appears?(a) Seafloor mining(b) Recovery from offshore placer deposits(c) Offshore mining and processing(d) Deep sea sedimentsI had been asked this question during an online interview.My question is from Chemical From Sea in section Inorganic Chemical Industries of Chemical Technology
Answer» Correct option is (c) Offshore mining and processing Easiest explanation: The major difficulty is in this process is in removing the ore from the SEAFLOOR to the DECK of the process barge. The considerable interests are seafloor phosphorite DEPOSITS on the SHELVES off the coasts of many nations.

Discussion

135.	Which of the following product is obtained at cathode in mercury cell process?(a) NaOH(b) NaHg(c) Cl2(d) NaClI have been asked this question in an international level competition.Question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» Right answer is (b) NaHg Easy EXPLANATION: NaCl is the electrolyte used,NAOH is the product OBTAINED in denuding tower, Cl2 is product obtained at ANODE, and NaHg is the product obtained at cathode in mercury cell PROCESS.

Discussion

136.	Concentration of NaOH produced in mercury cell process is ___________(a) 10-12%(b) 30-33%(c) 50%(d) 70%I got this question by my college professor while I was bunking the class.This question is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The correct choice is (d) 70% For explanation I WOULD say: 10-12% NaOH is PRODUCED in diaphragm cell. 30-33% NaOH is produced by membrane PROCESS. 70% NaOH is produced in MERCURY cell process.

Discussion

137.	Cathode used in electro chemical manufacture of adiponitrile from acrylonitrile is ____________(a) Titanium(b) Platinum-coated carbon(c) Graphite(d) LeadI had been asked this question by my school teacher while I was bunking the class.Question is from Inorganic Chemical topic in portion Inorganic Chemical Industries of Chemical Technology
Answer» The correct ANSWER is (d) LEAD Easiest explanation: The ELECTROCHEMICAL cell USES platinum-coated carbon or titanium as anode and lead as cathode. Anode and cathode are SEPARATED by permeable membrane.

Discussion

138.	Which of the following reaction takes place at cathode in electro chemical manufacture of adiponitrile from acrylonitrile?(a) H2O →2H^++\(\frac{1}{2}\) O2+ 2e^–(b) 2CH2=CHCN+2H2 O+2e^–→NC – (CH2)4 – CN(c) 2CH2=CHCN+2H2 O+2e^–→NC – (CH2)4 – CN+2OH^–(d) 2CH2=CHCN+2H2 O→NC – (CH2)4 – CN+\(\frac{1}{2}\) O2This question was addressed to me during a job interview.The above asked question is from Inorganic Chemical in division Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT option is (c) 2CH2=CHCN+2H2 O+2e^–→NC – (CH2)4 – CN+2OH^– To EXPLAIN I WOULD say: Reaction H2O →2H^++\(\frac{1}{2}\) O2+ 2e^– takes place at anode since it is an oxidation reaction. In the reaction 2CH2=CHCN+2H2O + 2e^– → NC-(CH2)4-CN, charge is unbalanced. Reaction2CH2=CHCN+2H2O+2e^–→NC-(CH2)4-CN+2OH^– takes place at cathode.

Discussion

139.	What is the chemical formula of triple super phosphate?(a) (Ca3 (PO4)2)3∙CaF2(b) CaH4 (PO4)2(c) Ca3 (PO4)2(d) CaH4 (PO4)2∙CaSO4This question was addressed to me in final exam.I'd like to ask this question from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The correct option is (b) CAH4 (PO4)2 The EXPLANATION: Chemical formula of triple super PHOSPHATE formed by reaction of phosphate ROCK with phosphoric acid containing 42-50%P2O5 is CaH4(PO4)2.

Discussion

140.	Which of the following is used as reducing agent in electric furnace process (direct conversion at plant site)?(a) Coke(b) Graphite(c) Nascent hydrogen(d) Sodium amalgamThis question was posed to me in an internship interview.My doubt stems from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology
Answer» Right answer is (a) COKE Easiest explanation: Coke is USED as REDUCING agent for reducing phosphorous present in calcium phosphate CA3 (PO4)2into elemental phosphorous P4.

Discussion

141.	What is the percentage of P2O5present in triple super phosphate?(a) 16-20%(b) 42-50%(c) 30-35%(d) 62-70%The question was asked during an online interview.This intriguing question originated from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» RIGHT option is (b) 42-50% To EXPLAIN I would say: Super phosphate contains 16-20%P2O5 WHEREAS triple super phosphate contains 42-50%P2O5. These are 2 DISTINCT GRADES of calcium phosphate.

Discussion

142.	Which of the following reaction unit is used in manufacture of Ammonium Nitrate by Stengel’s process?(a) Carbon steel(b) Graphite(c) Stainless steel(d) TantalumThe question was posed to me in a national level competition.This intriguing question originated from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT choice is (d) Tantalum The explanation: Carbon steel can be used only in the reaction where TEMPERATURE reaches a maximum of 120 degrees. However, in Stengel process, where it is necessary to preheat 60% HNO3 to 170 degrees, expensive tantalum metal is needed to avoid high temperature HNO3 CORROSION.

Discussion

143.	What is the major difference between kellogg and Linde-Frankl process?(a) Recuperative heat exchanger(b) Catalytic oxidation chamber(c) Scrubbing tower(d) RefrigerationThe question was asked in semester exam.I'm obligated to ask this question of Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology
Answer» The correct option is (a) Recuperative heat EXCHANGER The explanation is: The major DIFFERENCE between the kellogg and Linde-Frankl CYCLE is the USE of a recuperative heat exchanger. These are built in a concentric triple-tube design with high purity oxygen moving through the inner tube, never contacting the air. This is known as recuperative heat exchanger.

Discussion

144.	Which principle is used in the production of producer gas?(a) Steel industry’s heating(b) Heating, chemical synthesis(c) Only heating(d) Only chemical synthesisI got this question during an online exam.Query is from Inorganic Chemical in portion Inorganic Chemical Industries of Chemical Technology
Answer» CORRECT ANSWER is (a) Steel industry’s heating Best explanation: Steel industry’s heating requirements like heat treat, coke ovens are used in the PRODUCTION of PRODUCER gas, only heating is done in the production of OIL gas. Heating and chemical synthesis combinely done in order to produced water gas and coke oven gas.

Discussion

145.	What is the percentage of N2H4 present in hydrazine hydrate?(a) 64% N2H4(b) 80% N2H4(c) 98% N2H4(d) 50% N2H4The question was posed to me at a job interview.I want to ask this question from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» RIGHT option is (a) 64% N2H4 Easiest EXPLANATION: PERCENTAGE of N2H4 present in HYDRAZINE hydrate is 64% N2H4 whereas 98% N2H4 present in the anhydrous hydrazine produced from the distillation of hydrazine hydrate.

Discussion

146.	Cathode used in electrolysis of brine by diaphragm cell type is _____________(a) Lead(b) Iron(c) Titanium(d) CarbonI have been asked this question in an international level competition.Question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The correct ANSWER is (B) Iron For EXPLANATION: Iron is used as cathode in electrolysis of brine by DIAPHRAGM cell type where H2 gas and aqueousNaOH are obtained. Anode used is graphite where CHLORINE is obtained.

Discussion

147.	What is the molecular weight of hydrazine?(a) 28(b) 30(c) 32(d) 17I had been asked this question in unit test.The question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology
Answer» The CORRECT choice is (C) 32 Easy EXPLANATION: Molecular formula of hydrazine is N2H4. 2 nitrogen atoms and 4 HYDROGEN atoms MAKE 1 mole of N2H4.Molecular weight = 214 + 41 = 32.

Discussion

148.	What is used for bromine concentration?(a) Seawater with air(b) Seawater with HCl(c) Chlorinated seawater with air(d) Chlorinated seawater with HClThe question was asked during an online interview.The doubt is from Chemical From Sea topic in portion Inorganic Chemical Industries of Chemical Technology
Answer» The correct answer is (c) Chlorinated seawater with AIR To explain I would say: When seawater is used, bromine is first concentrated by vaporizing chlorinated seawater with air, and then SO2 is introduced into dilute bromine LADEN air and is sent to an absorption TOWER countercurrent to water.

Discussion

149.	Which one mentioned below is not a property of bromine extracted from sea?(a) Dark red(b) Low-boiling(c) High density(d) Low densityThis question was addressed to me during a job interview.My enquiry is from Chemical From Sea topic in section Inorganic Chemical Industries of Chemical Technology
Answer» RIGHT answer is (d) Low DENSITY Best explanation: Bromine, a dark red, low boiling and high density liquid of intensely irritating odour, is very reactive chemically, and belongs to the halogen GROUP of elements. THUS, low density is not physical property of bromine.

Discussion

150.	Which one is a NaOH process with no Cl2 co-product?(a) HCl-air oxidation with Fe2O3(b) HCl-air-Cl2 oxychlorination(c) HNO3-Nacl-air process(d) Na2CO3– Ca(OH)^2This question was posed to me during an online interview.My question is taken from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology
Answer» Right choice is (d) Na2CO3– Ca(OH)^2 Best explanation: Na2CO3-Ca(OH)^2 process is the PRODUCTION of NaOH with no Cl2 co-product while HCl-air oxidation with FE2O3 CATALYST, HCl-air-Cl2 oxychlorination process are the production chlorine WITHOUT any co-products.

Discussion

Explore topic-wise InterviewSolutions in .

How liquid NH3 fertilizer can be produced?(a) By the gypsum process(b) By fauser process(c) By solvay process(d) From NH3 and HCLI got this question in an online quiz.This is a very interesting question from Inorganic Chemical topic in portion Inorganic Chemical Industries of Chemical Technology

Which of the following have lowest percentage of uranium present in them?(a) Pitchblende(b) Monazite sands(c) Carnotite(d) Phosphate rock inclusionsThis question was addressed to me in quiz.My query is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology

Which material is used to purify ThO2?(a) Butyl phosphate(b) NaOH leaching(c) Butyl triphosphate(d) Acid leachingThis question was addressed to me in quiz.This interesting question is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology

Which type of cement is used for brick mortar composition?(a) Portland cement(b) High alumina(c) Hydraulic lime(d) PozzolanaThe question was posed to me in semester exam.My question is from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology

What is the molecular weight of Oxygen?(a) 30(b) 31(c) 32(d) 33This question was addressed to me by my school teacher while I was bunking the class.I'd like to ask this question from Inorganic Chemical in division Inorganic Chemical Industries of Chemical Technology

What is the undesirable product in urea production?(a) Ammonium carbonate(b) Biuret formation(c) Liquid NH3(d) Flakes formationI had been asked this question in a job interview.Origin of the question is Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

Specific reaction rate constant is denoted by _______(a) k(b) K(c) R(d) GI have been asked this question in class test.My question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

Nitromethane is which type of propellants?(a) Monopropellants(b) Bipropellant(c) Solid propellants(d) Liquid propellantsThis question was posed to me in a job interview.The above asked question is from Inorganic Chemical in division Inorganic Chemical Industries of Chemical Technology

Which grade hydrogen is used in production of boranes?(a) Zero grade(b) Ultra high purity grade(c) Industrial grade(d) Research gradeI got this question during a job interview.This key question is from Inorganic Chemical topic in division Inorganic Chemical Industries of Chemical Technology

Which gas is used for shipping anhydrous hydrazine?(a) Nitrogen(b) Nitric oxide(c) Oxygen(d) ChlorineI have been asked this question during an interview for a job.The question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

In which form C4 explosives are appeared?(a) Colourless crystal(b) Odorless(c) Smells like motor oil(d) Dyed pink powderI got this question during an interview for a job.This interesting question is from Inorganic Chemical in portion Inorganic Chemical Industries of Chemical Technology

Which of the following product is obtained at cathode in mercury cell process?(a) NaOH(b) NaHg(c) Cl2(d) NaClI have been asked this question in an international level competition.Question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

Concentration of NaOH produced in mercury cell process is ___________(a) 10-12%(b) 30-33%(c) 50%(d) 70%I got this question by my college professor while I was bunking the class.This question is from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology

What is the percentage of P2O5present in triple super phosphate?(a) 16-20%(b) 42-50%(c) 30-35%(d) 62-70%The question was asked during an online interview.This intriguing question originated from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

What is the percentage of N2H4 present in hydrazine hydrate?(a) 64% N2H4(b) 80% N2H4(c) 98% N2H4(d) 50% N2H4The question was posed to me at a job interview.I want to ask this question from Inorganic Chemical topic in chapter Inorganic Chemical Industries of Chemical Technology

Cathode used in electrolysis of brine by diaphragm cell type is _____________(a) Lead(b) Iron(c) Titanium(d) CarbonI have been asked this question in an international level competition.Question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

What is the molecular weight of hydrazine?(a) 28(b) 30(c) 32(d) 17I had been asked this question in unit test.The question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

Which one mentioned below is not a property of bromine extracted from sea?(a) Dark red(b) Low-boiling(c) High density(d) Low densityThis question was addressed to me during a job interview.My enquiry is from Chemical From Sea topic in section Inorganic Chemical Industries of Chemical Technology