Description : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with
Last Answer : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with A. FeS B. CO C. `Cu_(2)S` D. `SO_(2)`
Description : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal
Last Answer : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts ... . If (A) is incorrect but (R ) is correct
Description : Which of the followigng metal is obtained by the reduction of metal oxide with Hydrogen gas
Last Answer : Which of the followigng metal is obtained by the reduction of metal oxide with Hydrogen gas A. Cu B. Al C. Mg D. Fe
Description : What is reduction of oxide with carbon at high temperature called? -General Knowledge
Last Answer : The answer is 'Smelting'
Last Answer : answer:
Description : Oxide layer formed on the non-ferrous metal surface after its annealing is (A) Removed by acid pickling (B) Hammered into the surface (C) Removed with coarse emery cloth
Last Answer : Option A
Description : What will be formed when a metal oxide dissolves in water?
Last Answer : ANSWER: A BASE
Description : Write the different types of oxide films formed on the metal surface. Explain the oxide film which is more protective against corrosion.
Last Answer : Types of oxide films 1. Stable porous oxide film 2. Stable non porous oxide film 3. Unstable oxide film 4. Volatile oxide film i) Stable nonporous oxide film ii) Unstable oxide films are protective ... . Example: - Such type of oxide film is formed in the metals like Ag, Au, and Pt.
Description : Some statement about Ellingham diagram (a) Increase in the slope of the line on +ve side indicates the phase ransformation (b) Metal oxide decomposes
Last Answer : Some statement about Ellingham diagram (a) Increase in the slope of the line on +ve side indicates the phase ... C. Only b and c D. a,b and c
Description : For the formation of metal oxide, `deltaG^(@)` __________ with increase in temperature.
Last Answer : For the formation of metal oxide, `deltaG^(@)` __________ with increase in temperature. A. Only I B. I,II only C. I,II,III only D. All
Description : 45.4 L of nitrogen reacted with 22.7 L of oxygen and 45.4 L of nitrogen oxide was formed. The reaction is given below: 2N2(g) + O2(g) →2N2O(g) Which law is being obeyed in this experiment? Write the statement of this law.
Last Answer : Ans. Gay lussac’s law of gaseous volume is being obeyed. According to gay lussac’s law of gaseous volumes, gases combine or are produced in a chemical reaction in a simple ration by volume, provided that all gases are the same temperature and pressure.
Description : A sulphide ore is first converted into its oxide before reduction. This is done because :
Last Answer : A sulphide ore is first converted into its oxide before reduction. This is done because : A ... oxide is generally less stable than the metal sulphide
Description : Which of the following faction is of no significance for roasting sulphide ores to the oxide and not subjecting the sulphide ores in carbon reduction
Last Answer : Which of the following faction is of no significance for roasting sulphide ores to the oxide and ... are thermodynamically more stable than `CS_(2)`
Description : Why carbon reduction process is not applied for reducing aluminium oxide to aluminium ?
Last Answer : Ans. Because aluminium metal itself a very powerful agent and can easily reduce CO formed during the reaction back to carbon.
Description : Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products
Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS
Description : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .
Last Answer : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides ... -1 : is false , statement-2 : is true
Description : Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation ... (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
Last Answer : (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature
Last Answer : (C) Cold working of a metal decreases its fatigue strength
Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'
Description : What is hard and brittle iron that is formed into a particular shape by pouring the liquid metal into a mold?
Last Answer : I think it would be cast
Description : Which of the following molecules or ions is NOT formed when K metal reacts with liquid CH3OH? Is it: w) potassium ion x) hydrogen ion y) methoxy ion z) hydrogen molecule
Last Answer : ANSWER: X -- HYDROGEN ION
Description : What tools are better to use on home plumbing and wouldn't it be easier to use a liquid plumbing agent to free up debris in the lines?
Last Answer : Certain tools are preferred and required to do home Plumbing repair. Liquid Drano is a product out there and it is very thick and hard to use, but it is safe. The best equipment to have would be a sing auger, and a toilet auger.
Description : Why is it easier to cook in a pressure cooker? (a) High pressure creates turbulence (b) More steam is formed inside the cooker (c) Boiling point of water is raised (d) Boiling point of water is lowered
Last Answer : Ans:(c)
Description : Shrinkage allowance on pattern is provided to compensate for shrinkage when the (A) Metal changes from liquid state to solid state at freezing temperature (B) Solid phase temperature drops ... to room temperature (D) Liquid metal temperature drops from pouring temperature to freezing temperature
Last Answer : (B) Solid phase temperature drops from freezing temperature to the room temperature
Description : Pick out the wrong statement. (A) Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value (B) Environmental pollution by ... in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere
Last Answer : (D) The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere
Description : A decrease in water content results in a reduction of the volume of a soil in (A) Liquid state (B) Plastic state (C) Semi solid state (D) All of these
Last Answer : (D) All of these
Description : Pick out the wrong statement. (A) The controlling resistance in case of heating of air by condensing steam is in the air film (B) The log mean temperature difference (LMTD) for ... a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature
Last Answer : (C) In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs
Description : (A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` `DeltaG=-300kj//"mole"`
Last Answer : (A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` ` ... incorrect D. If (A) is incorrect but (R ) is correct
Description : Bauxite is an oxide mineral o f
Last Answer : Bauxite is an oxide mineral o f A. Barium B. Boron C. Bismuth D. Aluminium
Description : Do power plants use specialized scrubbers o remove sulfur oxide gases?
Last Answer : Need answer
Description : What is the electron configuration of the oxide ion (O ^-2) *The "^" represents a superscript. *Review at the diagram below for help.?
Last Answer : 1s2 2s2 2p4
Description : Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace? (A) Increase in calorific value of the fuel (B) Increase in flame temperature (C) Reduction in scale losses (D) Saving in fuel consumption
Last Answer : (A) Increase in calorific value of the fuel
Description : You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature. -Chemistry
Last Answer : Aim: To test the nature of oxides formed by metals and non-metals. Materials Required: Sulphur powder, Mg ribbon, water, blue litmus paper, red litmus paper. Procedure: 1.Take magnesium ribbon ... the metallic oxides are basic in nature whereas most of the non-metallic oxides are acidic in nature.
Description : Why Transient Metal Oxide Is Used To Make Stained Glass ?
Last Answer : Degeneration of electrons occurs in the d orbitals of their last orbits when transition metals form compounds . So their compounds (silicates) are colored. This is why transition metal oxides are used to make stained glass.
Description : Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
Last Answer : Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most ... C. `SrCO_(3)` D. `BaCO_(3)`
Description : A metal oxide has `40%` oxygen. The equivalent weight of the metal is:
Last Answer : A metal oxide has `40%` oxygen. The equivalent weight of the metal is:
Description : If the equivalent mass of a metal is double that of oxygen then the weight of its oxide is ___ times greater than the weight of the metal.
Last Answer : If the equivalent mass of a metal is double that of oxygen then the weight of its oxide is ___ times greater than the ... A. 1.5 B. 2 C. 0.5 D. 3
Description : `3 g` of an oxide of a metal is converted completely to `5 g` chloride. Equivalent weight of metal is:
Last Answer : `3 g` of an oxide of a metal is converted completely to `5 g` chloride. Equivalent weight of metal is: A. 33.25 B. 3.325 C. 12 D. 20
Description : X gm of metal gave Y gm of its oxide, so equivalent mass of metal is :
Last Answer : X gm of metal gave Y gm of its oxide, so equivalent mass of metal is : A. `(y-x)/(x)xx8` B. `(x)/((y-x))xx8` C. `(x)/(y)xx8` D. `(x+y)/(x)xx8`
Description : The oxide of a metal (R ) can be reduced by the metal (P) and metal (R ) can reduce the oxide of metal (Q). Then the decreasing order of the reactivit
Last Answer : The oxide of a metal (R ) can be reduced by the metal (P) and metal (R ) can reduce the oxide of metal (Q). Then ... C. `R gt P gt Q` D. `Q gt P gt R`
Description : A metal contains, metal oxide as impurity. The method used to refine this metal is
Last Answer : A metal contains, metal oxide as impurity. The method used to refine this metal is A. Poling B. Liqation C. Cupellation D. Distallation
Description : Is an oxide a metal non-metal or metalloid?
Last Answer : These terms apply to elements, not compounds.
Description : In the illustrated amplifier, the base of the transistor is what type of material? EL-0022 A. N type B. P type C. metal oxide insulator D. alloy junction material
Last Answer : Answer: A
Description : Which metal is protected by the layer of its own oxide?
Last Answer : Aluminum
Description : The formation of oxide film on a metal due to atmospheric exposure reduces its (A) Toughness (B) Stiffness (C) Creep limit (D) All (A), (B) & (C)
Last Answer : (C) Creep limit
Description : Which metal is protected by the layer of its own oxide? (A) Iron (B) Silver (C) Calcium (D) Aluminium
Last Answer : (D) Aluminium
Description : Name the alkali metal which forms only the normal oxide on heating with air ?
Last Answer : Ans. Li.
Description : The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is: (a) Copper granules (b) Magnesium ribbon (c) Sodium pellets (d) Aluminum dust
Last Answer : (d) Aluminum dust