Give reasons:(a) Platinum, gold and silver are used to make jewellery.(b) Sodium, potassium and lithium are stored under oil.(c) Aluminum is highly reactive metal, yet it is used to make utensils for cooking.(d) Carbonate and sulphides ores are usually converted into oxides during the process of extraction.

Q: Write the equation for the reaction of:(a) Iron with steam(b) Calcium with water(c) Potassium with…

A:

Q: An element forms an oxide, E2O3, and a fluoride, EF3.(a) Of which two groups might E be a member?(b)…

A: a) The oxidation state of E is +3 as it forms E2O3 and EF3 thus E belongs to 3A or 3B group.

Q: An element forms an oxide, E₂O₃, and a fluoride, EF₃.(a) Of which two groups might E be a member?(b)…

A: a. (a) When element E form oxide E2O3 then oxidation state of E is +3. When it forms fluoride EF3…

Q: ive short answers to the following. a. What is the correlation of ionization potential and atomic…

A: a. As we move from left to right atomic number increases because electron getting added but…

Q: Magnesium carbonate is soluble in water (100 mg / L) whereas strontium carbonate is only slightly…

A:

Q: Semiconductors made from elements in Groups 3A(13)and 5A(15) are typically prepared by direct…

A: Given: Mass of molten gallium     = 32.5 g Volume of molten gallium = 20.4 L Temperature…

Q: Hydroxylamine (NH2OH) reduces copper(II) to the free metal in acid solutions. Write a balanced…

A: The chemical reaction in which number of atoms for each element in the reaction and the total charge…

Q: Hydrogen fluoride is produced industrially by the action of sulphuric acid on CaF2. Suppose 308 kg…

A: 1) the percent of yield is = 73.5%. 2) the unreacted CaF2 is = 81.7 Kg.

Q: The prefix eka- comes from the Sanskrit word for “one.”Mendeleev used this prefix to indicate that…

A: Eka-manganese was the name given to the element which is below manganese in the periodic table.

Q: Comment on the structural and compositional implications of (a) the Fe-deficiency of iron(II)…

A: Iron oxide exist as Fe(ll) oxide and Fe(III) oxide.Iron(II) oxide or FeO is inorganic oxide.…

Q: Describe the role of the following :(i) NaCN in the extraction of silver from a silver ore(ii)…

A: Given process, (i) NaCN in the extraction of silver from a silver ore(ii) Iodine in the refining of…

Q: A) What are Oxides. Write the difference between acidic and basic oxides. B) Write the equation for…

A: The question is based on the concept of oxides . we have to explain about acidic,  basic and…

Q: Write chemical equations for the following processes: (iv) Reduction of VO2+to produce VO2+ (v)…

A: iv) Since in VO2+ , V is in 5+ state and in VO2+ , V is in 4+ state Hence the reduction of VO2+ is…

Q: Why is it important to know the reactions of alkali and alkaline metals in metallurgical processes?

A: Alkali metals are group 1 elements like potassium, sodium, Lithium, cesium, rubidium etc. Alkaline…

Q: Suppose that nA = 0.22nB and a small change in composition results in μA changing by δμA = −15 J…

A: At constant P, T: ∑ni dμi=0 Thus it implies that: nA dμA+nB dμB=0                 ...... (1)

Q: Provide two reactions for rubidium which are of high importance. They could be reactions of wide…

A: Imoprtant reactions of rubidium: Rubidium (Rb), a element of Group 1 in the periodic table, an…

Q: Consider the given Ellingham diagram. At 1000 °C, which among Mg, Al, and Zn can be extracted from…

A: Given:  Ellingham diagrams are plots of standard free energy change versus temperature for the…

Q: Would the reaction of beryllium, Be, with oxygen be more or less vigorous than ba?

A:

Q: Would the reaction of cesium, Cs, with oxygen be more or less vigorous than K?

A: We are given two elements K and Cs

Q: The only alkali metal that reacts with oxygen to give a compound with the expected stoichiometry is…

A:

Q: Lead is more often found in nature as its sulfide than its oxide. Provide a brief rationale for this…

A: Most of the proportion of lead is found in earth crusting, where it is in the form of sulfide ore.…

Q: Some of the water on earth was formed by the interaction ofiron and silicon oxides and methane.…

A: When chemical substances combine such that their ionic or molecular structures change to generate…

Q: Write chemical equations for the following processes: (iv) Reduction of VO2+ to produce VO2+ (v)…

A: iv) Since in VO2+, V is in 5+ state and in VO2+, V is in 4+ state Hence the reduction of VO2+ is…

Q: Write the chemical formula for each of the following compounds, and indicate the oxidation state of…

A: Chemical formula of Sodium hypochlorite is NaClO  or  NaOCl . Oxidation state of Na = +1 Oxidation…

Q: (a) Mention the optimum conditions for the industrial manufacture of ammonia by Haber’s process. (b)…

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Q: The first ionization energies of iron, cobalt, nickel, and the first three platinum metals are all…

A: The ionization energy is the energy needed to remove an electron from the outermost shell of the…

Q: Give answers of the following. a. Transition elements are placed in the center. Give detailed…

A:

Q: Write the chemical formula for each of the following compounds, and indicate the oxidation state of…

A: The formula and oxidation state of halogen for hydroiodic acid has to be given. The given compound…

Q: Hydroxylamine 1NH2OH2 reduces copper(II) to the free metal in acid solutions. Write a balanced…

A: Introduction: We have to balance the reaction between hydroxylamine and Cu2+.

Q: Predict the volume of hydrogen generated at 1.00 atm and25°C by the reaction of 4.53 g scandium with…

A: Given that: pressure of hydrogen gas = 1.00 atm Temprature = 25°C  Mass of scandium =  4.53 g  To…

Q: What mass, in grams, of hydrogen gas forms during the complete reaction of 10.01 g of calcium with…

A: Given: Molar mass of Ca=40.078 g/ mol. Given mass of Ca=10.01 g

Q: The U.S. Department of Energy has set the benchmark of 6% H by weight for an acceptable hydrogen…

A: given materials : NaAlH4, LiAlH4, LaNi5H6,  TiFeH2

Q: (a) What are the different oxidation states exhibited by the lanthanoids? (b) Write two…

A: (a) What are the different oxidation states exhibited by the lanthanoids? In the lanthanide series,…

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.