Description : Heat engine deriving its power from the energy liberated by the explosion of a mixture of some hydrocarbon, in a gaseous or vaporized form. a. Dual Combustion Engine b. Internal Combustion Engine c. External Combustion Engine d. None of the above
Last Answer : Internal Combustion Engine
Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these
Last Answer : (D) None of these
Description : (4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that ... of salt it become wet in rainy season as the salt absorbs moisture from environment.
Last Answer : Which of the following could be used as fuel in propellant or rockets? (1) Liquid Hydrogen + Liquid Nitrogen (2) Liquid Oxygen + Liquid Argon (3) Liquid Nitrogen + Liquid Oxygen (4) Liquid Hydrogen + Liquid Oxygen
Description : Are Tinker Toys and logs still made? if so are the still made of real wood?
Last Answer : It’s hard to do but you can still get real wood Lincoln Logs. Tinker Toys are plastic now and the suck. My favorite toy was a baton, you can still get them.
Description : Real wood burning fire or fake gas logs?
Last Answer : I have such mixed feelings. I agree that it is not the same. I love the wood burning, but the pollution is pretty bad. In the Pacific Northwest on a cold evening when everyone is using ... air quality is horrible with a smog-like effect and high particulate matter that is very bad for asthmatics.
Description : What A wood stove burns 4 same sized logs in 2 hours. How many logs does the stove burn in 8 hours?
Last Answer : Feel Free to Answer
Description : `CH_(3) equiv C CH_(3) overset(Na, NH_(3) (i))(rarr) Q overset("dil. Cold")underset(KMnO_(4))(rarr) R` If Q is an unsaturated hydrocarbon then product
Last Answer : `CH_(3) equiv C CH_(3) overset(Na, NH_(3) (i))(rarr) Q overset("dil. Cold")underset(KMnO_(4))(rarr) R` If ... ii & iii B. i & ii C. only v D. only iv
Description : Copper is refined by - (1) roasting (2) oxidation (3) electrolysis (4) zone refining
Last Answer : (1) roasting Explanation: Copper is refined by the method of roasting. In the roaster, the copper concentrate is partially oxidised to produce "calcine" and sulfur dioxide gas. In roasting, the ... ore concentrate is treated with very hot air. This process is generally applied to sulphide minerals.
Description : Refined acetic acid storage vessel are made of (A) Copper (B) Aluminium (C) High carbon steel (D) Nickel
Last Answer : (B) Aluminium
Description : By which process copper is refined ------? A. Roasting (Answer) B. Oxidation C. Zone Refining D. Electrolysis
Last Answer : A. Roasting (Answer)
Description : Copper is refined commercially by a process of: w) smelting x) electrolysis y) sublimation z) roasting
Last Answer : ANSWER: X -- ELECTROLYSIS
Description : Copper is refined by (1) roasting (2) oxidation (3) electrolysis (4) zone refining
Last Answer : roasting
Description : In which of the following the impure metal not purified by the oxidation of impurites
Last Answer : In which of the following the impure metal not purified by the oxidation of impurites A. silver ... iron and cadmium D. bessemerisation of pig iron
Description : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually carried out from its bauxite or
Last Answer : Refining process of impure metals depends upon the differences in properties of the metal. ... . leaching C. liquation D. magnetic seperation
Last Answer : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually ... A D. I-D,II-A,III-C,IV-B
Description : `CO_(2), CH_(4), N_(2)O` and CFCs are called greenhouse gases because they can absorb:
Last Answer : `CO_(2), CH_(4), N_(2)O` and CFCs are called greenhouse gases because they can absorb: ... radiations C. visible light radiations D. X-ray radiations
Description : Which one of the following gases is liberated when ethyl alcohol is heated with methyl magnesium iodide?
Last Answer : Which one of the following gases is liberated when ethyl alcohol is heated with methyl magnesium ... Methane B. Ethane C. Carbondioxide D. Propane
Description : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` respectively. `Y` turns acidified `K_2 Cr_2 O_7`
Last Answer : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` ... )SO_(4)` D. `NaC1 and Na_(2)CO_(3)`
Description : What is blister copper ?
Last Answer : Copper mixed with blister waste.
Description : Copper is purifed by electrolaytic refining of blister copper ,The correct statement (s) about this prcess is (are)
Last Answer : Copper is purifed by electrolaytic refining of blister copper ,The correct statement (s) about this ... at cathode D. Impurites settle as anode -mud
Description : Blister copper is:
Last Answer : Blister copper is: A. Bessemer converteer B. Reverberatory furnace C. Blast furnace D. Electrolytic tank
Description : In Bessemer converter `Cu_(2)S` is converted in to blister copper in
Last Answer : In Bessemer converter `Cu_(2)S` is converted in to blister copper in A. self reduction B. reduction with ... coal gas D. reduction with `H_(2)` gas
Description : The impurity present in Blister copper is
Last Answer : The impurity present in Blister copper is A. FeS B. `Cu_(2)O` C. `Cu_(2)S` D. FeO
Description : Explain electro-refining of blister copper:
Last Answer : 1. It is carried out in the large lead lined tank. 2. Impure Copper is placed into large plates which are suspended into tank at intervals & acts as anode. 3. Cathodes are thin plates of pure ... pure copper is deposited on the cathodes. 7. Electro - refined copper is about 99.99% pure.
Description : Metal refined by cupellation process is
Last Answer : Metal refined by cupellation process is A. Ag B. Fe C. Zn D. Sn
Description : Which of the following metal is refined by distaillation method
Last Answer : Which of the following metal is refined by distaillation method A. Zinc B. Iron C. Tin D. Copper
Description : Explain the process of zone refining. Name one metal refined by this method.
Last Answer : The apparatus used for zone refining consists of a circular heater fitted around the rod of impure metal at one end. The circular heater is slowly moved to the other end. At the heated zone, ... in solid metal passes into the adjacent molten part. A metal refined by zone refining is germanium.
Description : Pick up the correct statement from the following: Method of sawing timber (A) Tangentially to annual rings, is known as tangential method (B) In four quarters such that each board cuts annual rings ... medullary rays and perpendicular to annual rings, is known as radial sawing (D) All the above
Last Answer : Answer: Option D
Description : In a furnace operation, which is not preheated? (A) Solid fuels (B) Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.) (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : 'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and (A) Petrol (B) LPG (C) Light hydrocarbon gases (e.g. butane or propane) (D) None of these
Last Answer : (A) Petrol
Description : Pick out the wrong statement pertaining to nitric acid. (A) About 90% of nitric acid is manufactured by Ostwald's process (B) It is a strong mono basic acid which reacts with almost all the ... (mainly NO2 ) (D) Arc process of nitric acid manufacture is economical as compared to Ostwald's process
Last Answer : (D) Arc process of nitric acid manufacture is economical as compared to Ostwald's process
Description : How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? -Science
Last Answer : Bring a burning matchstick near the gas. It burns with ‘pop’ sound showing that it is hydrogen gas.
Description : When equal weight of methyl alcohol and ehtyl alcohol react with excess of sodium metal, the volume of `H_(2)` liberated is more in the case of
Last Answer : When equal weight of methyl alcohol and ehtyl alcohol react with excess of sodium metal, the volume of `H_(2 ... in both D. `H_(2)` is not liberated
Description : In the events leading up to Hitler and Nazi Germany, were there groups like the KKK and neoNazis already stirring?
Last Answer : There was a large anti semitic movement, a eugenics movement in the sciences, intolerance to gays, zenophobia plus other factors. What I read pretty much painted a picture where Hitler was heavily ... are all players now when in that time many were legitimately ignorant of the unfolding situation.
Description : Estimates from the planning stage will need to be refined as the project progresses, because it is virtually impossible to develop an exact assessment of the project’s schedule before the analysis and design phases are conducted.
Last Answer : Ans: True
Description : I've been stirring up some old questions (and GA-ing some former users). Does this bother anyone?
Last Answer : answer:I always like to see a bit of new life in an old question (except the time dependent [“my dog is vomiting”] question that has a post 3 years later – pretty sure that’s not going to be helpful). Besides, any sourpuss that doesn’t like it can just click “stop following”.
Description : What pets make stirring music? -Riddles
Last Answer : Trumpets.
Description : Why does stirring increase the rate of dissolution?
Last Answer : Thr number of collisions between solute and solvent molecules is increased.
Description : Stirring brings substances together so they can?
Last Answer : Matter Webquest
Description : A liquid disturbed by stirring comes to rest due to – (1) density (2) surface tension (3) viscosity (4) centripetal force
Last Answer : (3) viscosity Explanation: It happens because of viscosity. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. It is due to friction between neighboring parcels of the fluid that are moving at different velocities.
Description : In the activated sludge process A. Aeration is continued till stability B. Aeration is done with an admixture of previously aerated sludge C. Sludge is activated by constant stirring D. Water is removed by centrifugal action
Last Answer : ANS: B
Description : When mixing electrolyte for a lead-acid storage battery, ______________. A. stirring should always be avoided B. a lead container should always be used C. always pour the water into the acid D. always pour the acid into the water
Last Answer : Answer: D
Description : reduction in thermal resistance during heat transfer does not occur in the (A) Convection heat transfer by stirring the fluid and cleaning the heating surface (B) Conduction heat transfer by ... Radiation heat transfer by increasing the temperature and reducing the emissivity (D) None of these
Last Answer : Option C
Description : Fermentation is stopped by pasteurizing and ____. a. cooling c. stirring b. heating d. settling
Last Answer : a. cooling
Description : A definition put forward to resolve a dispute by influencing attitudes or stirring emotions is called (A) Lexical (B) Persuasive (C) Stipulative (D) Precisions
Last Answer : (B) Persuasive
Description : A liquid disturbed by stirring comes to rest due to (1) density (2) surface tension (3) viscosity (4) centripetal force
Last Answer : viscosity
Description : If bra burning was to demonstrate liberation from men, because women still wear them, what are they liberated from today?
Last Answer : answer:Bras are symbolic of women for many reasons. One is, it is a garment men don't wear. Women still now, and especially the last ten year, wear a ridiculous amount of squeeze into undergarments. A ... of ideal. Men certainly don't help by being attracted to younger women; so many of them are.
Description : Which of the following organisms is most likely to produce green-house gases such as nitrous oxide and methane? (1) Fungi (2) Earthworm (3) Bacteria (4) Green plants
Last Answer : (4) Green plants Explanation: When it comes to greenhouse gases many of us think first of CO2. But a large proportion of global greenhouse gas emissions are actually other gases, ... from fertilisers and methane mostly from cows. In peat pasture areas these emissions are particularly prevalent.
Description : Which of the following organisms is most likely to produce greenhouse gases such as nitrous oxide and methane? (1) Fungi (2) Earthworm (3) Bacteria (4) Green plants
Last Answer : Green plants