5. Why are most metals polycrystalline in microstructure. How would you get a: a. large grained metal b. fine grained metal

Q: In order to plate a steel part having a surface area of 0.13 m2 with a 0.05 mm thick layer of…

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Q: Product: Nail Cutter 1. Why did we use metal in making nail cutterl? Why not ceramics or polymer?…

A: The solution is shown below

Q: Explain the observed properties of Corundum (-Alumina) based on the features of its crystal…

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Q: What allotrope of carbon is used to reduce iron ore? O Coke

A: Solution: We know iorn ore is a mixture of hematite (Fe2O3) and magnetite (Fe3O4). So the iorn is…

Q: 4. The science and technology of extracting metals from their ores, refining them, and preparing…

A: Alloy :-  alloy is mixture of two or more elements which forms a impure substance but it never loose…

Q: i) ii) Steel essentially contains a) 80% or more iron b) 50% or more iron c) Alloying elements like…

A: The above questions can be answered as

Q: How coulometry is done? Explain the steps in a simple way.

A: Coulometric Analysis is an application of Faraday᾿s first law of electrolysis. It is based on the…

Q: Diamond is not a good conductor of electricity because:(a) It is very hard(b) Its structure is very…

A: The current is explained as the flow of electrons in a conductor. Hence, to conduct the electricity,…

Q: What hazards should you be aware of when working with copper and lead compounds in the laboratory

A: High levels of copper and lead compounds can be harmful. Inhaling large amounts of copper or lead…

Q: What is meant by the terms homogeneous and homozygous for insulating materials?

A: An insulating material refers to the material that does not allow electricity to pass through it.…

Q: Why are metals generally lustrous?

A: The general definition of the metals can be done as the elements that have tendency to lose…

Q: A metal      is brittle     is shiny     is a nonconductor of heat and electricity…

A: Those substance which breaks easily with lattice force are called brittle.

Q: Dr Kootsookos was cooking breakfast one day and the saucepan handle got hot and crumbled in her…

A: The polymer which is used for making saurcepan handle name is given below.

Q: What are the main factors that determine the electrical resistance of a formation?

A: Solution:  The main factors which determine the electrical resistance of formation are mentioned…

Q: Heating pyrites to remove sulphur is called:(a) Smelting(b) Calcination(c) Liquation(d) Roasting

A: The process to remove sulfur from pyrites is called Roasting. Option (d) is correct.

Q: Ores contain minerals and gangue. Describe the difference between a mineral and gangue.

A: A naturally occurring inorganic substance that has a definite composition and formula is called as…

Q: what are alloys? give examples.

A: Alloys: Combination of two or more metals in order to enhance the chemical and physical properties…

Q: What is the coordination number of a metal ion in a complexion? How does it differ from oxidation…

A: Coordination number is defined as the number of the ligands which are immediately surrounded or…

Q: of 75 mole % of copper and 25 mole percent of nickel. Which diagram best depicts the structure of…

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Q: actually removing:  a. all of the choices here are acceptable b. the impurities c. the oxides d.…

A: Magnesium ribbons contain a layer of magnesium oxide.

Q: Reasons why ore must be screened?

A: Ores must be screened due to the following reasons.

Q: When dilute HCl is added to zinc pieces taken in a test tube(a) No change takes place(b) the colour…

A: Given: dil.HCl is added to Zn pieces.

Q: How many grams of magnesium metal would be needed to make exactly 100.0 g of magnesium oxalate…

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Q: What are Inclusion compounds? Draw an example.

A: Compounds are composed of one or more molecules or contains different atoms in different…

Q: What is chrome plating or electroplating? Briefly explain how this process works.

A: The chrome plating can provide corrosion resistance and helps in easing the cleaning procedures. It…

Q: Why are metallized films a cheaper alternative to foil?

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Q: b) Diamond is a strong and hard material that does not conduct electricity. Verify this statement.…

A: Diamond is crystalline allotrope of carbon.It is a good conductor of heat but bad conductor of…

Q: What are semi-conductors?

A: Conductors are those substances which allow heat or electricity to pass through it while insulators…

Q: Alloying can harden the metals because

A: The main alloying elements which affect hardenability are carbon ,boron. Alloys contain atoms of…

Q: Why copper is used to make hot water tanks and not steel?

A: This is because steel contains iron which reacts with steam and form iron oxide.

Q: 5.1 Write any two characteristics of Chemisorption. 5.2 Why does physisorption decrease with the…

A: Chemisorption is defined as a type of adsorption which engages a reaction between the surface and…

Q: what are semi-conductors ? give examples.

A: Semiconductors are poorer electric conductors than metals but better conductors than non metals. Ex.…

Q: Which metals are found in carboy steel?

A: Steel is an alloy. Alloy is a mixture of two or more metals. The alloy has different properties than…

Q: Why polycrystalline form of a material is stable than single crystalline form?

A: All matter can be classified as solid, liquid, and gases mainly. In these physical states of matter,…

Q: Explain about passivation in metals

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Q: Consider the molecule NF3. How can we explain the observation that the F-N-F bond angles in NF3 are…

A: Disclaimer : Since the problem contains multiple questions , we are answering only the first…

Q: Write the overall balanced equation and if it is reduced or oxidizedwhen when copper wire is in a.…

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Q: Like metallic crystals, ceramic crystals can have defects. We want to identify the type of defects…

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