Description : Which of the following metals is obtained from its most common ore using an electrolytic process? w) nickel x) tin y) aluminum z) manganese
Last Answer : ANSWER: Y -- ALUMINUM
Description : Which of the following metals causes Itai-Itai disease? (1) Cadmium (2) Chromium (3) Cobalt (4) Copper
Last Answer : (1) Cadmium Explanation: Itai-itai disease was the documented case of mass cadmium poisoning in Toyama Prefecture, Japan, starting around 1912. The cadmium poisoning caused softening of the bones and kidney ... damage. Itai-itai disease is known as one of the Four Big Pollution Diseases of Japan.
Description : Which of the following metals causes Itai-Itai disease ? (1) Cadmium (2) Chromium (3) Cobalt (4) Copper
Last Answer : Cadmium
Description : Sphalerite is a primary ore of which of the following metals? w) zinc x) tin y) copper z) iron
Last Answer : ANSWER: W -- ZINC
Description : Cinnabar, pyrite and galena are minerals which consist of one or more metals combined with the same element. Which one of the following is the element that is common to all three of these minerals? Is it: w) iron x) copper y) sulfur z) sodium
Last Answer : ANSWER: C-- SULFUR
Description : Which of the following materials are used in the manufacture of pig iron from iron ore? w) Limestone and carbon x) Calcium oxide and oxygen y) Chromium and nickel z) Oxygen and sulfur dioxide
Last Answer : ANSWER: W -- LIMESTONE AND CARBON
Description : Which oxide of the following metals is often used as a pigment in white paint? w) titanium x) cobalt y) nickel z) vanadium
Last Answer : ANSWER: W -- TITANIUM
Description : Copper is refined commercially by a process of: w) smelting x) electrolysis y) sublimation z) roasting
Last Answer : ANSWER: X -- ELECTROLYSIS
Description : The metals commonly used for electroplating are – (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium
Last Answer : (2) Chromium, Copper and Nickel Explanation: The process of electroplating takes place as metals in ionic form move from a positive to negative electrode. An electric current passing through the ... ability of metal objects. Plating protects by one of two ways, either sacrificially or mechanically.
Description : The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium
Last Answer : Chromium, Copper and Nickel
Description : The electrolysis of molten sodium hydride librates hydrogen gas at the ------------- .
Last Answer : Ans. Anode
Description : What substance is produced at the cathode in the electrolysis of molten sodium chloride?
Last Answer : ANSWER: SODIUM
Description : Which of the following is an important element of stainless steel. w) chromium x) magnesium y) copper z) nickel
Last Answer : ANSWER: W -- CHROMIUM
Description : Galena is a primary ore of which of the following metals? w) zinc x) tungsten y) lead z) silver
Last Answer : ANSWER: Y -- LEAD
Description : Hematite is a primary ore of which of the followin metals? w) zinc x) tungsten y) iron z) none of the above
Last Answer : ANSWER: Y -- IRON
Description : Which one of the following metals is essential to the structure and functioning of hemoglobin? w) copper x) magnesium y) tin z) iron
Last Answer : ANSWER: Z -- IRON
Description : Which of the following metals is LEAST reactive toward atmospheric oxygen? w) Lead x) Copper y) Iron z) Aluminum
Last Answer : ANSWER: X -- COPPER
Description : Which of the following metals is a solid at room temperature, yet melts in your hand? w) gallium x) cesium y) sodium z) magnesium
Last Answer : ANSWER: W -- GALLIUM
Description : Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium
Description : What is a typical spacing between atoms in a crystal, e.g., copper or rock salt? w) 0.1 Angstroms x) 2 Angstroms y) 20 Angstroms z) 100 Angstroms
Last Answer : ANSWER: B -- 2 ANGSTROMS
Description : Which of the following metals is NOT obtained by reduction using carbon? (1) Copper (2) Sodium (3) Iron (4) Zinc
Last Answer : (2) Sodium Explanation: Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal.
Description : Which of the following substances would be the best choice to neutralize sulfuric acid? w) sodium hydroxide x) silicon dioxide y) copper metal z) phosphorus pentoxide
Last Answer : ANSWER: W -- SODIUM HYDROXIDE
Description : A metal that does NOT occur native in the earth is w) copper x) gold y) sodium z) silver
Last Answer : ANSWER: Y -- SODIUM
Description : What is the process by which an atom gains electrons? w) Reduction x) Neutralization y) Electrolysis z) Oxidation
Last Answer : ANSWER: W -- REDUCTION
Description : Metal required for polymerization of insulin is (A) Copper (B) Chromium (C) Cobalt (D) Zinc
Last Answer : Answer : D
Description : Constituents of stellite are (A) Zinc, copper and nickel (B) Cobalt, chromium and tungsten (C) Zinc, aluminium and nickel (D) Nickel, cobalt and vanadium
Last Answer : (B) Cobalt, chromium and tungsten
Description : Constituents of stellite are (A) Zinc, copper & nickel (B) Cobalt, chromium & tungsten (C) Zinc, aluminium & nickel (D) Nickel, cobalt & vanadium
Last Answer : (B) Cobalt, chromium & tungsten
Description : State as to why: (a) A solution of Na2CO3 is alkaline? (b)alkali metals are prepared by electrolysis of their fused chlorides ? (c)sodium is found to be more useful than potassium ?
Last Answer : Ans. (a) It undergoes hydrolysis to produce a strong base NaOH . (b) When the aq. Solution of any alkali metal is subjected to electrolysis ,H2 instead of the alkali metal is produced at the ... of sugars and amino acids into the cells. Thus, sodium is found to be more useful than potassium.
Description : Manganite is an ore/mineral of ______. (1) Beryllium (2) Chromium (3) Manganese (4) Copper
Last Answer : (3) Manganese Explanation: Manganite is an ore mineral of manganese. As a manganese ore, it ranks after pyrolusite and romanechite.
Description : A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What ... the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.
Last Answer : ANSWER: Y -- THE LOSS AND READSORPTION OF THE COBALT'S WATERS OF HYDRATION.
Description : How many water molecules are contained in Cobalt (II) sulfate heptahydrate? w) 3 x) 6 y) 8 z) 7
Last Answer : ANSWER: D -- 7
Description : Which one of the following metals pollutes the air of a city having large number of automobiles? (1) Cadmium (2) Chromium (3) Lead (4) Copper
Last Answer : (3) Lead Explanation: The history of car pollution has been one of air and water contamination followed by regulated improvement. Cars and trucks cause a lot of air the pollution in the world ... . But since leaded gasoline has been phased out, lead emissions have decreased by about 98 percent.
Last Answer : Lead
Description : Which of the following are alloying materials used the manufacture of stainless steel? w) Limestone and carbon x) Calcium oxide and oxygen y) Oxygen and sulfur dioxide z) Chromium and nickel
Last Answer : ANSWER: Z -- CHROMIUM AND NICKEL
Description : 36. Aluminium is extracted from alumina (Al2O3 ) by electrolysis of a molten mixture of : (1) Al2O3 + KF + Na3AlF6 (2) Al2O3 + HF + NaAlF4 (3) Al2O3 + CaF2 + NaAlF4 (4) Al2O3 + Na3AlF6 + CaF2
Last Answer : Al2O3 + Na3AlF6 + CaF2
Description : Name the process used to obtain Aluminum by electrolysis of aluminum oxide dissolved in molten cryolite?
Last Answer : ANSWER: HALL PROCESS
Description : Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in ... is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin
Last Answer : C. Amalgam is an alloy of two or more metals, one of them is mercury
Description : Molten rock beneath the Earth's crust is called: w) magma x) liquicite y) lava z) igneous
Last Answer : ANSWER: W -- MAGMA
Description : Which of the following liquid metals has the highest thermal conductivity? (A) Molten sodium (B) Molten lead (C) Mercury (D) Molten potassium
Last Answer : (A) Molten sodium
Description : Good quality of edible salt is obtained from brine by the process of (A) Solar evaporation (B) Vacuum evaporation (C) Freeze drying (D) Electrolysis
Last Answer : (B) Vacuum evaporation
Description : Which of the following metals is used in the electromagnets? (a) Soft iron (b) Stainless steel (c) Cobalt (d) Copper
Last Answer : Ans:(a)
Description : The principle behind a breeder reactor is: w) U-235 undergoes fission. x) U-238 is converted to Pu-239, which undergoes fission. y) Deuterium undergoes fission. z) Cobalt-60 undergoes fission.
Last Answer : ANSWER: X -- U-238 IS CONVERTED TO Pu-239, WHICH UNDERGOES FISSION.
Description : The radioactive element most commonly detected in humans is: w) potassium-40 x) cobalt-60 y) iodine-131 z) plutonium-238
Last Answer : ANSWER: W -- POTASSIUM-40
Description : What radioactive element is routinely used in treating hyperthyroidism, and in reducing thyroid activity? w) Iron-59 x) Gold-198 y) Cobalt-60 z) Iodine-131
Last Answer : ANSWER: Z -- IODINE-131
Description : Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum
Last Answer : ANSWER: Z -- ALUMINUM
Description : Which of the following refers to an easily melted product of the reaction between the flux and the impurities of an ore? w) slag x) slurry y) slug z) none of the above
Last Answer : ANSWER: W -- SLAG
Description : Statement-1: Sodium chloride is added during electrolysis of fused anhdrous magnesium chloride. Statement-2: Anhydous magnesium chloride is obtained b
Last Answer : Statement-1: Sodium chloride is added during electrolysis of fused anhdrous magnesium chloride. Statement-2: ... -1 is false but Statement -2 is true
Description : Which one of the following metals pollutes the air of a city having large number of automobiles? A. Cadmium B. Chromium C. Lead D. Copper
Last Answer : ANSWER: C
Description : Which of the following metals contribute to to biomagnifications problem in the ecosystem? (1) Mercury (2) Chromium (3) (4) Copper (4) (4) Lead
Last Answer : (1) Mercury Explanation: Mercury causes biomagnification problem in the ecosystem.
Description : Which of the following metals contribute to to biomagnification problem in the ecosystem ? (1) Mercury (2) Chromium (4) Copper (4) Lead
Last Answer : Mercury