Description : What is combustion pyrolysis?
Last Answer : Combustion pyrolysis is a process of chemical decomposition at high temperature (upto o 500 C) in total or partial absence of air.
Description : Presence of free moisture in coal during its high temperature carbonisation (A) Reduces the coking time (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls (C) Increases the loss of fine coal dust from the ovens when charging (D) None of these
Last Answer : (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls
Description : Which is correct matched ? 1. Arsenic poisoning -Black foot disease. 2. Secondary Effluent treatment-Biological process. 3. Pyrolysis -Solid soil wast
Last Answer : Which is correct matched ? 1. Arsenic poisoning -Black foot disease. 2. Secondary Effluent treatment-Biological process. 3. ... C. 2,3,4,5 D. 1,2,3,4
Description : Which one of the following statements about PYROLYSIS, which is a process for solid waste treatment is incorrect? (1) It converts the waste into solid, liquid and gas of which the resultant liquid ... pressure at temperature above 430° C. (4) It is a thermo chemical decomposition of organic waste
Last Answer : (2) The process occurs at a temperature above 430°C at atmospheric pressure. Explanation: Pyrolysis is a thermo-chemical decomposition of organic material at elevated temperatures in the ... . Pyrolysis generally takes place well above atmospheric pressure at temperatures exceeding above 430 °C.
Description : The biological decomposition of organic substances in wastes under controlled conditions known as - (1) composting (2) incineration (3) sanitary landfill (4) pyrolysis
Last Answer : (1) composting
Description : Wich of the following is a method/process of disposing of solid waste which cannot be re-used or recycled? (1) Landfills (2) Incineration (3) Pyrolysis and Gasification (4) An the above
Last Answer : (4) An the above Explanation: Landfills, Incineration, Pyrolysis and Gasification are methods of disposing of solid waste which cannot be reused or recycled.
Description : Thermal pyrolysis of ethylene dichloride produces (A) Trichloroethylene (B) Vinyl chloride (C) Ethanol amine (D) Ethylene oxid
Last Answer : (B) Vinyl chloride
Description : Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene? (A) Reforming (B) Pyrolysis (C) Alkylation (D) Hydrocracking
Last Answer : (A) Reforming
Description : Which of the following processes in oil refinery does not employ ‘cracking’? (A) Coking (B) Visbreaking (C) Pyrolysis (D) None of these
Last Answer : (D) None of these
Description : Pyrolysis of kerosene or natural gasoline is done to produce mainly the (A) Olefins and aromatics (B) Lighter paraffins (C) Stabilised gasoline (D) Diesel
Last Answer : (A) Olefins and aromatic
Description : Road grade bitumen is produced from vacuum residue by its (A) Aeration (B) Pyrolysis (C) Hydrogenation (D) Steam reforming
Last Answer : (D) Steam reforming
Description : Pick out the wrong statement. (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process (C) Lead susceptibility of ... Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process
Last Answer : (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process
Description : What do you mean by pyrolysis?
Last Answer : The decomposition of a compound by the heat is called pyrolysis. This process when applied to alkanes is known as cracking.
Description : Radioactive solid nuclear wastes are disposed off by (A) High temperature incineration (B) Pathological incineration (C) Pyrolysis (D) Underground burial in concrete containers
Last Answer : (D) Underground burial in concrete containers
Description : Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of (A) 4 kgf/cm2 & 500°C (B) 10 kgf/cm2 & 1000°C (C) 40 kg/cm2 & 200°C (D) 100 kgf/cm2 & 500°C
Last Answer : (A) 4 kgf/cm2 & 500°C
Description : Thermal pyrolysis of ethylene dichloride produces (A) Trichloroethylene (B) Vinyl chloride (C) Ethanol amine (D) Ethylene oxide
Description : Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in (A) Pyrolysis of oil (B) Sintering of porous catalyst (C) Hydrogen embrittlement (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Commercially ethylene is produced from naphtha by (A) Catalytic cracking (B) Catalytic dehydrogenation (C) Pyrolysis (D) Hydrocracking
Last Answer : (D) Hydrocracking
Description : Describe the following unit processes: (i) Pyrolysis (ii) Hydration (iii) Hydrogenation.
Last Answer : i)Pyrolysis: The decomposition of a compound by heat is called pyrolysis. Large alkane molecules are broken down to give lower molecular weight alkanes, alkenes and hydrogen. Eg: When ethane is heated to 500 ... Chemical Reaction for hydrogenation: CH2= CH2 + H2 → CH3-CH3 C6H6 + 3H2→C6H12
Description : Which one of the following statements about PYROLYSIS, which is a process for solid waste treatment is incorrect? (1) It converts the waste into solid, liquid and gas of which the resultant ... high pressure at temperature above 430° C. (4) It is a thermochemical decomposition of organic waste
Last Answer : The process occurs at a temperature above 430°C at atmospheric pressure.
Description : The biological decomposition of organic substances in wastes under controlled conditions known as (1) composting (2) incineration (3) sanitary landfill (4) pyrolysis
Last Answer : composting
Description : Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ? (1) Landfills (2) Incineration (3) Pyrolysis and Gasification (4) All the above
Last Answer : All the above
Description : Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain (A) CO (B) CO2 (C) H2O (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : Producer gas is obtained by A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast B. carbonisation of bituminous coal C. passing steam over incandescent coke D. passing air and a large amount of steam over waste coal at about 650°C
Last Answer : Answer: A
Description : In a fuel cell driven vehicle, the energy is obtained from the combustion of (A) Methane (B) Hydrogen (C) LPG (D) CNG
Last Answer : (B) Hydrogen
Description : A jet aeroplane travelling at the speed of 500 km/hr ejects its products of combustion at speed of 1500 km/hr relative to jet plane.
Last Answer : A jet aeroplane travelling at the speed of 500 km/hr ejects its products of combustion at speed ... latter with respect to an observer on the ground?
Description : Scavenging air in diesel engine means a. air used for combustion under pressure b. forced air for cooling the cylinder c. burnt air containing products of combustion d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke
Last Answer : ANSWER d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke
Description : The main function of a muffle in the muffle furnace is to (A) Protect the charge from the effects of the products of combustion (B) Smooth out temperature inequalities on the combustion side of the muffle wall (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Pick out the wrong statement. (A) Theoretical flame temperature is the temperature attained by the products of combustion, when the fuel is burned without loss or gain of heat (B) ... flame temperature (D) Adiabatic flame temperatures of actual combustions are always less than the maximum values
Last Answer : (C) Burning the fuel with excess pure oxygen results in maximum theoretical flame temperature
Description : Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its (A) Caking index (B) Yield of carbonised products (C) Friability & oxygen content (D) Calorific value
Last Answer : (C) Friability & oxygen content
Description : With increase in calorific value of fuels, their adiabatic flame temperatures (A) Increase (B) Decrease (C) Remain unchanged (D) May increase or decrease; depends on the quantity of products of combustion
Last Answer : (D) May increase or decrease; depends on the quantity of products of combustion
Description : A coal with high ash content is undesirable, as (A) It is abrasive to the coal pulveriser (i.e. ball mill) and the combustion chamber (B) The ash in molten condition gets absorbed in the pores of the ... and stick to the boiler tubes thereby reducing the heat transfer (D) All (A), (B) and (C)
Description : The internal energy of the combustion products is __________compared to that of reactants. (A) More (B) Less (C) Equal (D) More or less; (depends on the state of fuel.)
Last Answer : (B) Less
Description : If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be (A) Low (B) High (C) Very high, if the fuel is of low calorific value (D) None of these
Last Answer : (A) Low(A) Low
Description : Delicious chilgoza seeds, commercially important products such as turpentine and resin and the drug ephedrine, useful in asthma and other respiratory ailments, are all obtained from plants that are (a) Ferns (b) Algae (c) Monocotyledons and dicotyledons (d) Gymnosperms
Last Answer : Ans:(d)
Description : The energy obtained from plant and plant products is called
Last Answer : bio energy.
Description : Name four products other than edible oil which are obtained from oilseeds grown in India. -SST 10th
Last Answer : (i) Soaps, (ii) Medicines, (iii) Cattle feed, (iv) Perfumes.
Description : Which products will be obtained when lead nitrate is heated simply. Write balanced chemical equation for the reaction? State the type of chemical reaction that occur in the change. -Chemistry
Last Answer : Answer. Lead monoxide, nitrogen dioxide and oxygen gas will be liberated. It is thermal decomposition reaction.
Description : `CH_(3)CH_(2)CH_(2)CONH_(2)` is boiled with aqueous NaOH, then the reaction mixture is acidified with HCl. The products obtained are
Last Answer : `CH_(3)CH_(2)CH_(2)CONH_(2)` is boiled with aqueous NaOH, then the reaction mixture is acidified with HCl. The ... CH_(3)CH_(2)CH_(2)COO^(-)+NH_(4)Cl`
Description : When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are
Last Answer : When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are A. (1) `ClO_2^ ... ClO_2^-` D. `ClO^-` and `ClO_3^-`
Description : The products obtained on heating `LiNO_(3)` will be
Last Answer : The products obtained on heating `LiNO_(3)` will be A. `LiNO_(2)+O_(2)` B. `Li_(2)O+NO_(2)+O_(2)` C. `Li_(3)N+O_(2)` D. `Li_(2)O+OH^(-)+O_(2)`
Description : Which of the following is one of the commercial products obtained from Gelidium and Gracilaria and are used to grow microbes and in preparations of icecreams and jellies? (1) Agar (2) Chlorella (3) Spirullina (4) Gymnosperms
Last Answer : (1) Agar Explanation: Agar, one of the commercial products obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies.
Description : Crude oil is subjected to vacuum distillation in the last stage, because (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose (B) Lighter/low ... prone to thermal decomposition (C) High purity products can be obtained thereby (D) None of these
Last Answer : (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose
Description : Name the products obtained when anisole is treated with HI.
Last Answer : Ans. Phenol and methyl iodide.
Description : Which of the following is a violation of the code of professional ethics for certified public accountants? a. A CPA permits his/her name to be used in a client's advertising as having ... the professional designation "CPA" after his name on posters employed in connection with his election campaign
Last Answer : Based on information obtained in an audit, a CPA reports an illegal act of his client to government authorities.
Description : When yeast ferments glucose, the products obtained are (a) ethanol and CO2 (b) methanol and CO2 (c) ethanol and water (d) water and CO2.
Last Answer : a) ethanol and CO2
Description : Which of the following products are obtained by anaerobic respiration from yeast? (a) Beer and wine (b) Alcohols (c) CO2 (d) All of these
Last Answer : d) All of these
Description : Which one of the following statements is wrong? (a) Chlorella and Spirulina are used as space food. (b) Mannitol is stored food in Rhodophyceae. (c) Algin and carrageenan are products of algae. (d) Agar-agar is obtained from Gelidium and Gracilaria.
Last Answer : (b) Mannitol is stored food in Rhodophyceae.