Related Questions

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 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
Mine water flowing at 1.5 m3/s with 2 mg/l dissolved oxygen, joins riverwater flowing at 7 m3/s containing 6 mg/l dissolved oxygen. The saturated value of the dissolved oxygen in the mixture is given to be 9.3 mg/l. On the basis, the initial oxygen deficit of the mixture in mg/l is
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)
X' agreed to supply 1000 tons of iron at Rs. 100 per ton to 'Y' to be delivered not later than 31st January, 2002. 'X' also entered into a contract with 'A' for purchase of 1000 tons of iron at Rs. 80 per ton telling 'A' clearly that the iron is needed before 31st January, 2002 for supply to 'Y' to fulfil the contract with Y. 'A' fails to supply the iron to 'X' who in tum failed to supply the same to 'Y'. In an action by 'X' against 'A'.
Calculate the volume of the aeration tank required for the following data: Flow: 800 m3/d BOD: 1000 mg/L F/M ratio: 0.15(extended aeration) MLSS : 3500 mg/L
What is the value for α for mechanical aeration aeration for the following equation. α= KLA(wastewater) /KLA(Tap water)
Calculate the volume of the aeration tank required for the following data: Flow: 800 m3/d BOD: 1000 mg/L F/M ratio: 0.15(extended aeration) MLSS: 3500 mg/L
Main functions of baffles in a bioreactor are
P. To prevent a vortex.
Q. To increase aeration.
R. To reduce interfacial area of oxygen transfer.
S. To reduce aeration rate.
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?