Description : Main constituent of dolomite is (A) CaCO3 (B) MgCO3 (C) K2CO3 (D) Na2CO3
Last Answer : (B) MgCO3
Description : Pick out the exothermic reaction out of the following: (A) C + H2O = CO + H2 (B) CaC2 + H2O = Ca(OH)2 + C2H2 (C) MgCO3 = MgO + CO2 (D) All (A), (B) and (C)
Last Answer : (B) CaC2 + H2O = Ca(OH)2 + C2H2
Description : In which of the following states maximum iron ore is found ? (1) FeCO3 (2) Fe2O3 (3) Fe3O4 (4) FeS2
Last Answer : Fe2O3
Description : Match List-I with List-II and select answer from the codes given below- List-I (a) White Revolution (b) Grey Revolution (c) Blue Revolution (d) Green Revolution List-II 1. Fertilizer production 2. Fish production 3. Cereal production 4. Milk ... (A) 4 1 2 3 (B) 1 2 3 4 (C) 2 4 3 1 (D) 1 3 4 2
Last Answer : (A) 4 1 2 3
Description : Match List-I (crops) with List-II (water requirement) and select your answer from the code given below- List-I (a) Jowar (b) Soybean (c) Cotton (d) Groundnut List-II 1. 140 mm - 300 mm 2. 350 mm - 450 mm 3. 200 mm - 300 mm 4. 300 mm - ... (b) (c) (d) (A) 3 1 2 4 (B) 4 2 3 1 (C) 1 4 2 3 (D) 3 1 4 2
Last Answer : (C) 1 4 2 3
Description : Dolomite is an ore of which metal?
Last Answer : Magnesium
Description : Which of the following is an ore of iron? (a) Bauxite (b) Haematite (c) Dolomite (d) Alunite
Last Answer : Ans: (b)
Description : Which of the following minerals are found in a natural way in the State of Chhattisgarh ? 1. Bauxite 2. Dolomite 3. Iron ore 4. Tin Select the correct answer using the code given below : [IAS 2008] (a) 1, 2 and 3 only (b) 1 and 3 only (c) 2 and 4 only (d) 1, 2, 3 and 4
Last Answer : Ans: (d)
Description : Which of the following is not an ore of magnesium? (1) Carnallite (2) Dolomite (3) Calamine (4) Sea water
Last Answer : (3) Calamine
Description : What is the principal ore of aluminium? (1) Dolomite (2) Copper (3) Lignite (4) Bauxite
Last Answer : (4) Bauxite Explanation: Bacodte is an aluminium ore and is the main source of aluminium. This form of rock consists mostly of the minerals gibbsite, boehmite , and diaspore , in a mixture ... it was first recognised as containing aluminium and named by the French geologist Pierre Berthier in 1821.
Description : __________ is used as a flux in the smelting of copper ore like chalcopyrite. (A) Coke breeze (B) Lime powder (C) Silica/quartz (D) Dolomite
Last Answer : (C) Silica/quartz
Description : What is the principal ore of aluminium ? (1) Dolomite (2) Copper (3) Lignite (4) Bauxite
Last Answer : Bauxite
Description : Tick out the sexual spores of fungi (a) Chlamydospores (b) sporangiospores (c) Zoospores (d) Zygospores
Last Answer : (d) Zygospores
Description : Which of the following is easily weatherable mineral a. Quartz b. Gypsum c. Calcite d. Dolomite
Last Answer : c. Calcite
Description : Which of the following is the mineral name for ordinary salt? w) biotite x) calcite y) halite z) dolomite
Last Answer : ANSWER: Y -- HALITE
Description : 9. Match List I (Mineral Oil Refineries) with List II (States) and select the correct answer using the code given below : L i st I L i st I I (Miner al Oil (St at es) Refiner ies) A. Numaligarh I. Punjab B. Bathinda II. Andhra ... C-II, D-III (3) A-II, B-I, C-IV, D-III (4) A-IV, B-III, C-II, D-I
Last Answer : (2) A-IV, B-I, C-II, D-III
Description : The Gauss seidel load flow method has the following disadvantages. Tick the incorrect statement. A) Unreliable convergence B) Slow convergence C) Choice of slack bus affects convergence D) A good initial guess for voltages is essential for convergence
Last Answer : The Gauss seidel load flow method has the following disadvantages. Tick the incorrect statement. A) Unreliable convergence B) Slow convergence C) Choice of slack bus affects convergence D) A good initial guess for voltages is essential for convergence
Description : Define the terms: (i) Mineral (ii) ore
Last Answer : i) Mineral: A naturally occurring substance present in earth's crust which contains metal in the free or combined state is known as mineral. ii) Ore: The mineral from which the metal is conveniently and economically extracted is known as ore.
Description : Match the following: Revolutions Related to A White (i) Fishery B Blue (ii) Agriculture C Yellow (iii) Milk D Green (iv) oil seeds (a) A-iii, B-iv, C-ii, D-i (b) A-ii, B-iii, C-i, d-iv (c) A-iv, B-ii, C-i, D-iii (d) A-iii, B-ii, C-iv, D-ii
Last Answer : (d) A-iii, B-ii, C-iv, D-ii
Description : Match the following: Product Protein A Milk (i) keratin B Egg (ii) Myosin C Meat (iii) Casein D Wool (iv) Albumen
Last Answer : (c) A-iii, B-iv, C-ii, D-i
Description : Roasting of metallurgical ores is done mainly to (A) Dehydrate it (B) Sinter the ore (C) Remove CO2 & H2O (D) Remove arsenic & sulphur
Last Answer : (D) Remove arsenic & sulphur
Description : Mgco3 + hcl = What will happen ?
Last Answer : MgCO₃ + HCl → MgCl₂ + CO₂ + H₂O
Description : What does a reaction between MgCO3 and NH4Br form?
Last Answer : Magnesium carbonate is not soluble in water.
Description : Stalactites and Stalagmites form due to the precipitation of : (1) CaCO3 (2) CaCl2 (3) MgCl2 (4) MgCO3
Last Answer : (1) CaCO3 Explanation: Stalactites and stalagmites are formed by water dripping or flowing from fractures on the ceiling of a cave. The dominant mineral in them is calcite (calcium carbonate) ... minerals that may be deposited include other carbonates, opal, chalcedony, limonite, and some sulfides.
Description : Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of (A) MgO & Na2CO3 (B) MgSO4 & BaCl2 (C) BaSO4 & NaCl (D) MgCO3 & NaC
Last Answer : (A) MgO & Na2CO3
Description : Main constituent of limestone is (A) CaCO3 (B) MgCO3 (C) Na2CO3 (D) CaSO4
Last Answer : (A) CaCO3
Last Answer : CaCO3
Description : Among the following list of malachite ,marble anglestite ,azurtite ,dolomite ,sedererite ,calamine and chromite
Last Answer : Among the following list of malachite ,marble anglestite ,azurtite ,dolomite ,sedererite ,calamine and chromite
Description : In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite (ii) Malachite (iii) Calcite (iv) Copper pyrities
Last Answer : In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite ... Siderite (viii) Iron pyrite (ix) Ar gentite
Description : Which one of the following clay mineral has the highest CEC? (A) Vermiculite (B) Montmorillonite (C) Kaolinite (D) Illite
Last Answer : (A) Vermiculite
Description : The mineral weathering and clay formation are rapid where the climate is- (a) Warm and moist (b) Warm and dry (c) Cold and moist (d) Cold and dry
Last Answer : (c) Cold and moist
Description : The deficiency of this element leads to older leaves turning purple in colour on the underside. Identify the mineral? [a] Calcium [b] Phosphorus [c] Potassium [d] Iron [e] None of the above
Last Answer : [c] Potassium
Description : Percentage of mineral matter in milk is about :- a. 1 % b. 0.7 % c. 1.5 % d. 0.05 %
Last Answer : c. 1.5 %
Description : How many grams of O2 are required to produce 100.0 g of Fe2O3?
Last Answer : Need answer
Description : What the answer for FeS2 plus O2 - and get Fe2O3 plus SO2?
Last Answer : FeS + 7 O2 = 2 Fe2O3 + 4 SO2
Description : At which temperature direct reduction of Fe2O3 by carbon is possible ?
Last Answer : Ans. Above 1123 K, carbon can reduce Fe2O3
Description : Cement mainly contains (A) CaO, SiO2 , Al2O3 (B) MgO, SiO2 , K2O (C) Al2O3 , MgO, Fe2O3 (D) CaO, MgO, K2O
Last Answer : (A) CaO, SiO2 , Al2O3
Description : Portland cement consists mainly of (A) CaO & SiO2 (B) SiO2 & Al2O3 (C) CaO & Al2O3 (D) CaO & Fe2O3
Last Answer : (A) CaO & SiO2
Description : Which of the following is the second major component of cement? (A) Al2O3 (B) SiO2 (C) CaO (D) Fe2O3
Last Answer : (B) SiO2
Description : Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene? (A) AgO (B) Al2O3 (C) ZnCl2 (D) Fe2O3
Last Answer : (A) AgO
Description : During smelting process, the combination of fuel in the furnace (A) Forms carbon dioxide (B) Carbon dioxide with carbon forms carbon mono-oxide (C) Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2 (D) All the above
Last Answer : Answer: Option D
Description : Name the mineral ore from which aluminium is extracted? -SST 10th
Last Answer : (i) Bauxite. (ii) Aluminium is gaining importance because of its extreme lightness, good conductivity and great malleability. It combines the strength of metals such as Iron. (iii) ... large deposits. Odisha is the largest bauxite producing state. Others are Gujarat, Maharashtra and Jharkhand.
Description : What do you understand by the term ‘mineral ore’? -SST 10th
Last Answer : Metallic minerals are extracted from the earth in raw state, it is known as ‘mineral ore’.
Description : Does lead ore contain mineral feces ?
Last Answer : Sand with lead ore as sand mineral feces.
Description : How is the mineral ore bauxite processed to obtain aluminum?
Last Answer : Bauxite is refined to alumina (aluminum oxide) by heating whilemixed with sodium hydroxide, where the resultant soluble compoundsodium aluminate can be removed from the ore. The aluminumhydroxide can be ... at the cathode of a very large processingcell.This is called the Hall-Heroult process.
Description : If the cost of separating a mineral from waste rock becomes too great the mineral may no longer be classified as an ore. This happens because?
Last Answer : Feel Free to Answer
Description : The commodity which accounts for the maximum volume of goods transported by the railways in India is (a) iron and steel (b) coal (c) mineral oil (d) metallic ores (other than iron ore)
Description : Which of the following is the power resource mineral? A. Iron ore B. Limestone C. Coal 78 D. Copper
Last Answer : ANSWER: C
Description : which of the follwing is metallic mineral? A. Chromite B. Iron ore C. Both a and b D. None of them