(a)
Interpretation:
The balanced chemical equation for production of chromium has to be written.
Concept Introduction:
Balanced Chemical equation:
A balanced chemical equation is an equation which contains same elements in same number on both the sides (reactant and product side) of the chemical equation thereby obeying the law of conservation of mass.
(b)
Interpretation:
The balanced chemical equation for production of copper has to be written.
Concept Introduction:
Roasting:
- In metallurgy roasting is used to purify metals. Roasting involves heating of ore at high temperature in furnace by air.
- In roasting, conversion of gas to solid occurs to clean metals.
- Mostly sulphide undergoes roasting and gets converted to an oxide.
Balanced Chemical equation:
A balanced chemical equation is an equation which contains same elements in same number on both the sides (reactant and product side) of the chemical equation thereby obeying the law of conservation of mass.
(c)
Interpretation:
The balanced chemical equation for production of lead has to be written.
Concept Introduction:
Balanced Chemical equation:
A balanced chemical equation is an equation which contains same elements in same number on both the sides (reactant and product side) of the chemical equation thereby obeying the law of conservation of mass.
(d)
Interpretation:
The balanced chemical equation for production of potassium has to be written.
Concept Introduction:
Balanced Chemical equation:
A balanced chemical equation is an equation which contains same elements in same number on both the sides (reactant and product side) of the chemical equation thereby obeying the law of conservation of mass.
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General Chemistry: Atoms First
- The following reactions all occur in a blast furnace. Which of these are redox reactions? (a) 3Fe2O3(s)+CO(g)2Fe3O4(s)+CO2(g) (b) Fe3O4(s)+CO(g)3FeO(s)+CO2(g) (c) FeO(s)+CO(g)Fe(l)+CO2(g) (d) C(s)+O2(g)CO2(g) (e) C(s)+CO2(g)2CO(g) (f) CaCO3(s)CaO(s)+CO2(g) (g) CaO(s)+SiO2(s)CaSiO3(l)arrow_forwardHow many cubic feet of air at a pressure of 760 torr and 0 °C is required per ton of Fe2O3 to convert that Fe2O3 into iron in a blast furnace? For this exercise, assume air is 19% oxygen by volume.arrow_forwardSeveral transition metals are prepared by reduction of themetal halide with magnesium. Titanium is prepared by the Krollmethod, in which ore (ilmenite) is converted to the gaseous chlo-ride, which is then reduced to Ti metal by molten Mg. Assuming yields of 84% for step 1 and 93% for step 2,and an excess of the other reactants, what mass of Ti metal canbe prepared from 21.5 metric tons of ilmenite?arrow_forward
- A slag sample is known to contain all of its iron in the forms of FeO and Fe2O3. A sample of 1,000 g of the slag was dissolved in hydrochloric acid according to the usual method, then reduced with stannous chloride and finally titrated with a 0.02237 M solution of potassium permanganate, of which 28.59 mL were used. A second aliquot of the slag sample, weighing 1,500, was dissolved in a nitrogen atmosphere to further adjust the oxidation state of the iron, it was immediately titrated with the same potassium permanganate solution. If this second experiment required 15.60 mL of permanganate solution, calculate: a) The percentage of total iron in the slag. b) The percentages of the oxide FeO and Fe2O3arrow_forward(a) Mention the optimum conditions for the industrial manufacture of ammonia by Haber’s process. (b) Explain the following giving appropriate reasons: (i) Sulphur vapour exhibits paramagnetic behaviour: (ii) Red phosphorus is less reactive than white phosphorusarrow_forward(a) What are the different oxidation states exhibited by the lanthanoids? (b) Write two characteristics of the transition elements. (c) Which of the 3d-block elements may not be regarded as the transition elements and why?arrow_forward
- The lanthanide elements reacts with oxygen to give compounds of the type Ln2O3.However,the are interesting exceptions ,such as common oxide of Terbium, TbxOy(y and x stand for unknown) 1.Given that the compound is 73.945%,what is its formula? 2.What is the oxidation number of terbium in this compound? 3.Write a balanced equation for the reaction of terbium and oxygen to give this oxide.arrow_forward(i) Thermal stability of hydrides of group 16 elements decreases downthe group. Why?(ii) Compare the oxidising powers of F2and Cl2 on the basis of bonddissociation enthalpy, electron gain ethalpy of hologens and hydrationenthalpy of halide ions.(iii) Write the chemical equation for the reaction of copper metal withconc. HNO3.arrow_forwardwhat is the role of silica in the metallurgy of copper?arrow_forward
- Although Be has less negative value of reduction potential compared to group 1 and the rest of group 2. It still exhibits some reducing property. Account for this reducing nature of Be.arrow_forwardWhy do Selenium and tellurium occur in rare minerals?arrow_forwardWhen aluminum replaces up to half of the silicon atomsin SiO2, a mineral class called feldspars result. The feldspars are the most abundant rock-forming minerals, comprisingabout 50% of the minerals in Earth’s crust. Orthoclase is afeldspar in which Al replaces one-fourth of the Si atoms ofSiO2, and charge balance is completed by K+ ions. Determinethe chemical formula for orthoclase.arrow_forward
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