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Which of the following statements are true with respect to iron ore?
I. Limestone and coal are important for smelting iron ore
II. More than 20% of the world iron ore deposits are in India
III. Odisha and Jharkhand top in the production of iron ore
IV. Iran is the largest buyer of Indian iron ore
An iron blast furnace produces hot metal containing 95% Fe. The iron ore charged into the furnace contains 95% Fe2O3 and the rest is gangue. Assume that all the iron in the ore goes to hot metal. The amount of iron ore (in kg) required for producing 1000 kg of hot metal is (Atomic weight of Fe = 56 g mol-1 and that of Fe2O3 = 160 g mol-1)
Out of the total production of iron from hematite, an ore of Iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is
Which of the following statements are correct: 1. Australia is the top Iron ore producer in the world. 2. India is the 4th on a list of top iron ore producers in the world. 3. India does not import iron ore. Select the correct answer from the code given below:
An ore contains 25% of an alloy that has 90% iron. Other than this, in the remaining 75% of the ore, there is no iron. How many kilograms of the ore are needed to obtain 60 kg of pure iron?
Consider the following statements about Iron ore.
1. Iron ore was first discovered in Odisha by PN Bose in 1904.
2. The iron ore deposits of Odisha state occur in five districts including Koraput.
Which of the following statements is/are correct?
The following information is provided for an ore deposit:
Number of waste blocks = 10
Number of ore blocks = 5
Volume of each waste block, m3 = 600
Total cost of waste handling per m3 = Rs. 100
Tonnage of each ore block = 400
Total cost of ore handling per ton = Rs. 150
Sale price of ore per ton = Rs. 500
The net cash flow of mining the deposit in lakhs of rupees, is
Which of the following facts is/are correct about the blast furnace in Iron metallurgy? Limestone is added to the blast furnace to reduce the iron oxide in the ore to iron. Coke is added to the blast furnace to physically separate iron from other impurities. Carbon dioxide reduces to carbon monoxide.
Match the following: List - I List - II i. Ore of Pb (Lead) a. Siderite ii. Ore of Fe (Iron) b. Galena iii. Ore of Cu (Copper) c. Philosopher's wool iv. Ore of Zn (Zinc) d. Malachite  
Estimation of total iron in oxide ore comprises of three basic steps namely (i) extraction of iron into solution (ii) oxidation for volumetric analysis or precipitation for gravimetric analysis, and (iii) titration in volumetric analysis or ignition and weighting in gravimetric analysis. Which of the following concentrated acid is used for the first step i.e. extraction of iron into solution?