Description : Soil having high content of aluminum and iron oxide is also known as - (1) meadow soil (2) pedalfer soil (3) chernozen soil (4) podzol soil
Last Answer : (2) pedalfer soil Explanation: Pedalfer soil is composed of aluminum and iron oxides. It is a subdivision of the zonal soil order comprising a large group of soils in which sesquioxides increase relative to silica during soil formation.
Description : Thermite is a mixture of aluminum and: w) hematite x) sodium oxide y) iron z) magnesium
Last Answer : ANSWER: W -- HEMATITE
Description : Which of the following substances would be the best choice to neutralize aqueous Sodium Hydroxide? w) sodium carbonate x) silicon dioxide y) aluminum oxide z) phosphorus pentoxide
Last Answer : ANSWER: Z -- PHOSPHORUS PENTOXIDE
Description : Name the process used to obtain Aluminum by electrolysis of aluminum oxide dissolved in molten cryolite?
Last Answer : ANSWER: HALL PROCESS
Description : Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur
Last Answer : ANSWER: Z -- SULFUR
Description : How many moles of aluminum oxide are present in a sample having a mass of 178.43g?
Last Answer : The number of moles is 6,631.
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
Description : The powder component of IRM is essentially A. EBA with methyl methacrylate B. Zinc oxide with EBA C. Zinc oxide and aluminum oxide D. Zinc oxide and methyl methacrylate E. Zinc oxide and ethyl methacrylate
Last Answer : D. Zinc oxide and methyl methacrylate
Description : Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)
Last Answer : c. plain fissure bur
Description : What is Aluminum Sulphate called in modern Bengali ?
Last Answer : Aluminum sulphate is commonly called alum in Bengali.
Description : What is the physical condition of aluminum ?
Last Answer : The physical condition of aluminum is silver metal.
Description : Who Discovered Aluminum ?
Last Answer : Aluminum H. Orstad discovered.
Description : In what year was aluminum discovered ?
Last Answer : Aluminum was discovered in 1825 .
Description : What is the valence of aluminum ?
Last Answer : Aluminum valence 3 .
Description : What is the boiling point of aluminum ?
Last Answer : The boiling point of aluminum is 2467 degrees Celsius.
Description : What is the melting point of aluminum ?
Last Answer : Aluminum has a melting point of 660 degrees Celsius.
Description : What is the relative atomic mass of aluminum ?
Last Answer : Relative atomic mass of aluminum 27 .
Description : Where did the name Aluminum come from ?
Last Answer : The name Aluminum comes from the salt called Elam.
Description : What is the atomic number of aluminum ?
Last Answer : The atomic number of aluminum is 13 .
Description : What is the weight of aluminum in the crust ?
Last Answer : 7 parts of the weight of the crust is aluminum.
Description : What is Aluminum Plan ?
Last Answer : Aluminum is a metal. In the case of metallic elements, the number of electrons in the latest orbit indicates its valence. Since there are 3 electrons in the last orbit of aluminum, its scheme is 3
Last Answer : Aluminum symbol Al
Description : What is a mixture of potassium nitrate powdered charcoal and sulfur called? (1) paint (2) aluminum (3) brass (4) gun powder
Last Answer : (4) gun powder Explanation: Gun powder is the mixture of potassium nitrate powdered charcoal and sulfur.
Description : Give reason why boron and aluminum tend of form covalent compounds.
Last Answer : Ans. Sum of the three ionization enthalpies of both the elements are very high. Thus they have no tendency to lose electrons to form ionic compound. Instead they form covalent compounds.
Description : Give reason for the following observation (L-III) (a)- The tendency for catenation decreases down the group in group 14 (b)- The decreasing stability of+3 oxidation state with increasing atomic no. in group 13. (c)- Molten aluminum bromide is a poor conductor of electricity.
Last Answer : Ans. -(a) it is due to decrease in bond dissociation energy which is due to increase in atomic size C-C > Si-Si >Ge-Ge>Sn-Sn>Pb-Pb. (b)- It is due to inert pair effect. (c)- Molten AlBr3 is poor conductor of electricity because it is covalent compound.
Description : Why are isotopes not considered in Mendeleev’s periodic table?Name the elements which are predicted by Mendeleev as eka –silicon and eka –aluminum
Last Answer : Ans.Because Mendeleev gave priority to similarities in properties. Germanium and gallium
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 is the element which makes up about 8 percent of the earth's crust and occurs in all rocks except limestone and sandstone? w) sulfur x) aluminum y) sodium z) magnesium
Last Answer : ANSWER: X -- ALUMINUM
Description : Which of the 3rd period elements loses electrons most readily? w) Sodium x) Magnesium y) Aluminum z) Silicon
Last Answer : ANSWER: A-SODIUM
Description : Mendeleev proposed the existence of an unknown element that he called eka-aluminum. The element is now called: w) magnesium x) silicon y) gallium z) germanium
Last Answer : ANSWER: C -- GALLIUM
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 : What is the common name for Potassium Aluminum Sulfate dodecahydrate?
Last Answer : ANSWER: ALUM
Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group
Last Answer : ANSWER: Y -- CARBON-SILICON GROUP
Description : Which of the following elements would form a covalent bond with Bromine? w) Calcium x) Aluminum y) Oxygen z) Tin
Last Answer : ANSWER: Y -- OXYGEN
Description : What molten substance is used in the Hall process to reduce aluminum?
Last Answer : ANSWER: CRYOLITE
Description : Which of the following elements gains electrons most readily? w) Sodium x) Magnesium y) Aluminum z) Fluorine
Last Answer : ANSWER: D -- FLUORINE
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 : This noncombustible liquid in its dry form is noncorrosive to common metals except aluminum. About 90% of all of this material which is manufactured goes into the production of chlorofluorocarbons. ... substance: w) carbon tetrachloride x) methylene chloride y) hydrogen chloride z) methyl fluoride
Last Answer : ANSWER: W -- CARBON TETRACHLORIDE
Description : Which one of the following atoms has two unpaired electrons in its ground state: w) Sodium x) Calcium y) Oxygen z) Aluminum
Description : The metal extracted from Bauxite is : (1) Silver (2) Copper (3) Manganese (4) Aluminum
Last Answer : Aluminum