The mass of carbon anode consumed (givin...

The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (at . Mass of A1=27)

180 kg

270 kg

540 kg

90 kg

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In Hall process, in the production of Al, carbon is used as the anode material . The reaction are :

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In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass. sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water

Equal masses of two samples of charcoal A and B are burnt separately and the resulting carbon dioxide are collected in two vessels. The radioactivity of ^14 C is measured for both the gas samples. The gas from the charcoal A gives 2100 counts per week and the gas from the charcoal A gives 2100 counts per week and the gas from the charcoal B gives 1400 counts per week. Find the age difference between the two samples. Half-life of ^14 C = 5730 y .

Despite the fact that aluminium is a reactive metal, it is a stable in air as well as in water. This is due to the formation of thin layer of oxide on the surface of aluminium metal which makes it passive for further attack. The layer is so useful, that in industry, it is purposely deposited by an electrolytic process called anodising. Reaction of aluminium with oxygen is highly exothermic and is called thermite reaction. 2Al_((s)) +(3)/(2) O_(2(g)) rarr Al_(2)O_(3(s)) Delta_(f) H^(Ө) = -1670 kJmol^-1 This reaction finds application for welding of metal and in the metallurgical extraction of many metals from their oxides. The limitation is that to start the reaction, high temperature is required for which an ignition mixture is required. Anodising can be done by elecrolysing dil H_(2)SO_(4) with Al as anode. This results in :

A gas cylinder can hold 1 kg of hydrogen gas at room temperature and 1 atm pressure. Calculate the following: The mass of carbon dioxide which the cylinder could hold under similar conditions of temperature and pressure. (Molar mass of CO2 = 44 g)

Energy evolved from the fusion reaction 2_(1)^(2)H=_(1)^(4)He+Q is to be used for the production of power. Assuming the efficiency of the process to be 30% . Find the mass of deuterium that will be consumed in a second for an output of 50 MW .

Which of the following statements is correct ? (i) Copper is extracted by hydrometallury from low grade ores. (ii) In electrolytic reduction of alumina , graphite is acting as anode and steel vessel with lining of carbon acts as cathode. (iii) In Hall-Heroult process, aluminium is obtained at anode and CO and CO_(2) are produce at cathode

A cylinder can hold 1 kg of hydrogen at room temperature and pressure. What mass of carbon dioxide it can hold under similar conditions of temperature and pressure ? If the number of molecules of hydrogen in the cylinder is x, calculate the number of carbon dioxide molecules in the cylinder. Give reasons for your answer.

AAKASH INSTITUTE ENGLISH-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Assignment (Section-C) Previous Years Question

Which of the following statements, about the advantage of roasting of ...
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Sulphide ores of metals are usually concentrated by froth floatation p...
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The mass of carbon anode consumed (giving only carbon dioxide) in the ...
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In which of the following processes, fused sodium hydroxide is electro...
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Which of the following does not contain aluminium?
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Which of the following does not contain Mg?
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Carborundum is
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Mond's process is used for
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Which process of purification is represented by the following reaction...
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The most important ore of tin is
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The process used for the extraction of sodium is called :
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Among the metals Cr,Fe,Mn,Ti,Ba, and Mg, the one that cannot be obtain...
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Chemical used as a depressant in separatin ZnS from PbS in froth-float...
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The iron obtained from the blast furnace is called:
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