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

Q: Account for the relative band gap energies of semiconductors interms of periodic trends?

A:

Q: cassiterite is an ore of ?

A: Ore: It is a natural occurrence of rock in which minerals are present with economically significant…

Q: What is Oxide Ceramics? Demonstrate the advantages and disadvantages of ceramic materials compared…

A: Oxide ceramics are inorganic compounds of metals like aluminium, zirconium, titanium etc. or of…

Q: Silicon carbide (SiC) is made by the high-temperature reaction of silica sand (quartz) with coke;…

A: Given: At high temperature, the reaction of silica sand (quartz) and coke produces silicon carbide…

Q: one of the following is true about the sodium metabisulfite a. oxidized to sulfonic acid b. it is…

A: Given: Sodium metabisulfite (Na2S2O5)

Q: Cite and explain three reasons why ferrous alloys are used so extensively.

A: Three reasons why ferrous alloys are used so extensively have to be explained below.

Q: What chemical process is used for obtaining a metal from its oxide?

A: The chemical process used for obtaining metal from its oxide:

Q: Define the term a substitutional alloy?

A: Alloy is the one which is formed by mixing the metals.

Q: A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true…

A: Few questions based on general chemistry that are to be accomplished.

Q: The diagram below shows the variation in boilng point of the hydrides of Group V elements  Account…

A: Welcome to bartleby !

Q: ite form of iron has fcc crystal lattice structure,whereas its alpha form has bcc crystal lattice…

A: For a Face-Centred Cubic lattice:  4r=2a where r is the radius of the atom and a is the edge length.…

Q: What is the general trend of the boiling point of the hydrides of the chalcogens (H2S, H2Se, H2Te)…

A:

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: Describe some uses for (a) calcium and its compounds, and (b) magnesium and its compounds.

A: There are many  uses for (a) calcium and its compounds, and (b) magnesium and its compounds.

Q: The metal which is protected by a layer of its own oxide is ans. Copper Gold Aluminum Iron

A: Given Choices  Copper  Gold Aluminum Iron As we know iron in presence of air (oxygen and moisture)…

Q: (a) A alkali metals react withhydrogen to form hydrides and react with halogens to formhalides.…

A: Alkali metals are the elements of the periodic table placed in group-1. They are most…

Q: Explain magnesium oxide (MgO) process in detail.

A: Explain magnesium oxide (MgO) process in detail.

Q: How is Vanadium a Problem and an opportunity?

A: Interpretation: How vanadium is a problem and an opportunity is to be determined.

Q: (a) Two unlabelled bottles are suspected to contain beryllium and magnesium. (i) Suggest a simple…

A: we are requiredto distinguish two metal magnesium (Mg) and beryllium (Be)

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: Give explanations for the large drops in melting point fromC to Si and from Ge to Sn.

A: In the periodic table, the atomic size is decreases across left to right and up to down increases.…

Q: What is doping and operate Indium with Silicon and Phosphorous with Germanium

A: Given: 1.explain doping. 2. doping of indium with silicon 3. doping of phosphorous with Germanium

Q: what are the bondling and structure of graphite, explain why graphite is a good solid lubricant

A: Graphite has a covalent structure consisting of layers of carbon atoms. Carbon atoms have 4 valence…

Q: Geosciences are very versatile. This fact rests or the finding that the number of silicate minerals…

A: a) The step by step reaction sequence from silicic acid to tricyclosilicate is shown below-

Q: Give a brief explanation of this mineral Iron ore

A: Answer - Iron ore - Iron ores are rocks and minerals from which metallic iron can be economically…

Q: In what kind of sulfur preparation is precipitated sulfur preferred? Why?

A: Precipitated sulfur is prepared by boiling sulfur and calcium oxide in water and then precipitating…

Q: What is metallic glass? Describe the features that promote high glass-forming ability in metals.

A: Metallic glass: It is an amorphous metal alloy. The atoms in the materials are decorated by…

Q: Analyse the progress and assesses Solvay process for the production of sodium carbonate as an…

A:

Q: What is OFHC copper? Describe briefly its processing and comment on the applications of the metal…

A: alloys are the metallic  substance composed  of two or more elements as either a compound or…

Q: 3. Sketch all the Bravais lattices, why is there no Face centered tetragonal while there is a base…

A: By knowing the smallest unit cell of the compound we can know about the packing of the solid and…

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: hy do oxides of phosphorus and sulfur have varied oxidation number?

A: The oxidation state of an element is the representation of the charge acquired by that element after…

Q: Nearly every compound of silicon has the element in the 4 oxidation state. In contrast, most…

A: Part(a): Both Si and Pb belong to same group 14. Pb is down the group and Si is top the group. As we…

Q: Although Be has less negative value of reduction potential compared to group 1 and the rest of group…

A: Given information,    Although Be has less negative value of reduction potential compared to group…

Q: Speculate as to why carbon forms carbonate rather thansilicate analogs.

A: The d-orbitals are available for the elements that exhibit the principle quantum number of three or…

Q: The hypothetical metal is said to contain various crystalline defects. Explain the role of defects…

A: Crystal Defects is imperfection of regular geometrical shape. This happenes due to change of…

Q: H2 reacts with many s- and p-block elements forming metallic hydrides. On descending a group, the…

A: The question is based on periodic properties of elements. we have to identify the false statements.

Q: Why are fluorides of transition metals more stable in their higher oxidation state as compared to…

A: The stability of the lower vs. higher oxidation state of halides of transition metals depends on the…