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| 312308 Applied Science Chemistry K Scheme Msbte Exam Mcqs with Answers |
Explore the world of Applied Science, focusing on Physics and Chemistry, through the K Scheme's Previous Year MCQ (Multiple Choice Questions) with the title '312308 Applied Science Physics & Chemistry.' Leveraging insights from the MSBTEallclear website, this resource provides valuable assistance for studying. Join us as we delve into the realm of science, using the support of MSBTEallclear to enhance our understanding and preparation for the K Scheme curriculum.
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Also Study: Applied Science Physics MCQ's with Answers
- Title: 312308 Applied Science Chemistry
- Focus: Chemistry within the realm of Applied Science
- Format: Previous Year MCQ (Multiple Choice Questions)
- Purpose: To aid in studying and preparation for the K Scheme curriculum
- Resource: Leveraging insights and assistance from the MSBTEallclear website
- Approach: Utilizing MCQs to enhance understanding and retention
- Objective: To provide a comprehensive study tool for students navigating the complexities of Applied Science in the K Scheme
- Benefits: Offers structured preparation and practice for students aiming to excel in their academic pursuits.
Unit - IV Metals and Alloys
4.1 Ancient Indian Metallurgy (IKS)
4.2 Metals: Occurrence of metals in free and combined state. Basic concepts : Mineral, ore, gangue, flux and slag, metallurgy.
4.3 Metallurgy:Extraction processes of metal from ore Concentration : Gravity separation, electromagnetic separation, froth floatation, calcination and roasting, Reduction : Smelting, aluminothermic process, Refining,poling , electrorefining.
4.4 Mechanical properties of metals :Hardness, ductility, malleability, tensile strength, toughness, machinability, weldability, forging, soldering, brazing, castability.
4.5 Alloys: Purposes of making alloys with examples.
4.6 Preparation methods of alloys : Fusion, compression.
4.7 Classification of alloys :Ferrous and non-ferrous alloys Ferrous alloys: Composition ,properties and applications of low carbon, medium carbon, high carbon steels. Nonferrous alloy:Composition ,properties and applications of Brass, Bronze, Duralumin, Tinman Solder, Woods metal.
4.1 Ancient Indian Metallurgy (IKS)
1. Ancient Indian metallurgy (IKS) primarily focused on the extraction and processing of: a) Gold b) Silver c) Iron d) Copper
Answer: c) Iron
Explanation: Ancient Indian metallurgy, particularly in the context of IKS, was heavily focused on iron extraction and processing.
2. Ancient Indian metallurgical techniques were documented in texts such as: a) Vedas b) Upanishads c) Arthashastra d) Mahabharata
Answer: a) Vedas
Explanation: The Vedas contain references to ancient Indian metallurgical techniques and practices.
3. The term "Ayas" in ancient Indian texts referred to: a) Copper b) Iron c) Gold d) Bronze
Answer: b) Iron
Explanation: In ancient Indian texts, "Ayas" referred to iron, indicating its significance in metallurgy during that period.
4. Ancient Indian metallurgy made significant contributions to: a) Agriculture b) Warfare c) Textile industry d) Medicine
Answer: b) Warfare
Explanation: Ancient Indian metallurgy played a crucial role in advancing warfare technologies, including the production of iron weapons and tools.
5. The iron pillar of Delhi, dated to the Gupta period, is a testament to: a) Advanced bronze metallurgy b) Sophisticated iron smelting techniques c) Skilled craftsmanship in goldsmithing d) High-quality steel production
Answer: b) Sophisticated iron smelting techniques
Explanation: The iron pillar of Delhi, known for its corrosion resistance, showcases the advanced iron smelting techniques of ancient Indian metallurgy.
4.2 Metals: Occurrence of Metals in Free and Combined State, Basic Concepts
1.Metals occur in nature in the form of: a) Minerals b) Ores c) Gangue d) All of the above
Answer: d) All of the above
Explanation: Metals occur in nature as minerals and ores, often accompanied by gangue materials.
2. Gangue is: a) The desired metal b) The unwanted material accompanying the ore c) The flux used in metallurgical processes d) The by-product of metal extraction
Answer: b) The unwanted material accompanying the ore
Explanation: Gangue refers to the undesired material that accompanies the ore during metal extraction.
3. The process of obtaining metal from its ore is known as: a) Smelting b) Refining c) Metallurgy d) Reduction
Answer: c) Metallurgy
Explanation: Metallurgy encompasses the entire process of obtaining metal from its ore, including extraction, refining, and processing.
4. Which of the following is NOT a concentration technique used in metallurgy? a) Gravity separation b) Electromagnetic separation c) Distillation d) Froth flotation
Answer: c) Distillation
Explanation: Distillation is not typically used as a concentration technique in metallurgy; instead, it is commonly used for separating liquid mixtures based on differences in boiling points.
5. Calcination and roasting are processes used in: a) Concentration of ore b) Reduction of ore c) Refining of metal d) Shaping of metal
Answer: a) Concentration of ore
Explanation: Calcination and roasting are concentration techniques used to remove volatile impurities and moisture from the ore.
4.3 Metallurgy: Extraction Processes, Reduction, Refining
1. Smelting is the process of: a) Concentrating ore using heat b) Extracting metal from its ore using heat and reducing agents c) Refining metal using electrolysis d) Shaping metal through forging
Answer: b) Extracting metal from its ore using heat and reducing agents
Explanation: Smelting involves the extraction of metal from its ore by heating it with reducing agents to remove oxygen.
2. The aluminothermic process is commonly used for the extraction of: a) Iron b) Aluminum c) Copper d) Gold
Answer: b) Aluminum
Explanation: The aluminothermic process is commonly used to extract aluminum from its ore by reducing aluminum oxide using aluminum powder.
3.Refining of metal involves: a) Removing impurities to obtain pure metal b) Shaping metal into desired forms c) Joining metal parts together d) Increasing the strength of metal
Answer: a) Removing impurities to obtain pure metal
Explanation: Refining of metal involves processes aimed at removing impurities to obtain pure metal, often through techniques such as electrolysis or chemical treatments.
4. Poling is a refining technique used primarily for: a) Aluminum b) Copper c) Iron d) Silver
Answer: d) Silver
Explanation: Poling is a refining technique used primarily for refining silver, where impurities are removed by stirring the molten metal with green wood.
Electrorefining is commonly used for the refining of: a) Copper b) Aluminum c) Gold d) Lead
Answer: a) Copper
Explanation: Electrorefining is commonly used for refining copper, where impurities are removed by electrolysis.
4.4 Mechanical Properties of Metals: Hardness, Ductility, Malleability, Tensile Strength, Toughness, Machinability, Weldability, Forging, Soldering, Brazing, Castability
1. Hardness is a measure of a material's: a) Resistance to deformation b) Ability to conduct electricity c) Ability to absorb heat d) Resistance to corrosion
Answer: a) Resistance to deformation
Explanation: Hardness measures the resistance of a material to deformation, such as indentation or scratching.
2. Ductility refers to a material's ability to: a) Stretch without breaking b) Conduct electricity c) Resist indentation d) Withstand high temperatures
Answer: a) Stretch without breaking
Explanation: Ductility is the ability of a material to deform under tensile stress, typically by stretching without breaking.
Malleability is the property of a material to: a) Resist indentation b) Conduct electricity c) Be hammered or rolled into thin sheets d) Withstand high temperatures
Answer: c) Be hammered or rolled into thin sheets
Explanation: Malleability is the ability of a material to be hammered or rolled into thin sheets without breaking or cracking.
3. Tensile strength is the maximum: a) Pressure a material can withstand b) Temperature a material can withstand c) Force a material can withstand without breaking d) Weight a material can support
Answer: c) Force a material can withstand without breaking
Explanation: Tensile strength is the maximum force per unit area a material can withstand before breaking under tension.
4. Toughness is the ability of a material to: a) Resist indentation b) Absorb energy before fracturing c) Withstand high temperatures d) Conduct electricity
Answer: b) Absorb energy before fracturing
Explanation: Toughness is the ability of a material to absorb energy and deform plastically before fracturing.
5. Machinability refers to a material's ease of: a) Conducting electricity b) Conducting heat c) Forming into complex shapes d) Being machined or cut
Answer: d) Being machined or cut
Explanation: Machinability refers to a material's ability to be machined or cut easily with minimal tool wear.
6. Weldability refers to a material's ability to: a) Resist corrosion b) Form strong joints with other materials c) Conduct electricity d) Be shaped into desired forms
Answer: b) Form strong joints with other materials
Explanation: Weldability refers to a material's ability to form strong and reliable weld joints with other materials.
7. Forging is a manufacturing process that involves: a) Melting metal and pouring it into molds b) Shaping metal using compressive forces c) Joining metal parts using heat d) Coating metal with a thin layer of another metal
Answer: b) Shaping metal using compressive forces
Explanation: Forging is a manufacturing process that involves shaping metal by applying compressive forces, typically using a hammer or press.
8. Soldering is a joining process that involves: a) Melting and flowing a filler metal into the joint b) Heating the metal parts until they melt and fuse together c) Applying adhesive to bond metal parts together d) Using high-pressure to join metal parts
Answer: a) Melting and flowing a filler metal into the joint
Explanation: Soldering involves melting and flowing a filler metal (solder) into the joint between two metal parts to form a bond.
9. Brazing is similar to soldering but involves: a) Lower temperatures b) Higher temperatures c) No use of filler metal d) Use of adhesive
Answer: b) Higher temperatures
Explanation: Brazing is similar to soldering but is performed at higher temperatures and typically involves the use of a filler metal with a higher melting point.
10. Castability refers to a material's ability to: a) Be shaped into desired forms b) Conduct electricity c) Resist indentation d) Withstand high temperatures
Answer: a) Be shaped into desired forms
Explanation: Castability refers to a material's ability to be easily shaped or formed into desired shapes through casting processes.
4.5 Alloys: Purposes, Preparation Methods, Classification, Ferrous and Non-Ferrous Alloys
1. The primary purpose of making alloys is to: a) Increase the density of the metal b) Enhance the mechanical properties of the metal c) Decrease the melting point of the metal d) Decrease the electrical conductivity of the metal
Answer: b) Enhance the mechanical properties of the metal
Explanation: Alloys are made to improve the mechanical properties of metals, such as strength, hardness, and corrosion resistance.
2. Fusion method for preparing alloys involves: a) Melting and mixing constituent metals b) Dissolving one metal into another at high temperature c) Crushing and compressing metals together d) Applying adhesive to join metals together
Answer: a) Melting and mixing constituent metals
Explanation: Fusion method involves melting and mixing constituent metals to form an alloy.
3. Compression method for preparing alloys involves: a) Melting and mixing constituent metals b) Dissolving one metal into another at high temperature c) Crushing and compressing metals together d) Applying adhesive to join metals together
Answer: c) Crushing and compressing metals together
Explanation: Compression method involves crushing and compressing metals together to form an alloy.
4. Ferrous alloys are those that contain: a) Iron as the main constituent b) Copper as the main constituent c) Aluminum as the main constituent d) Nickel as the main constituent
Answer: a) Iron as the main constituent
Explanation: Ferrous alloys are those that primarily contain iron as the main constituent, often with other elements such as carbon and manganese.
5. Non-ferrous alloys are those that: a) Contain iron as the main constituent b) Do not contain iron as the main constituent c) Are magnetic d) Are harder than ferrous alloys
Answer: b) Do not contain iron as the main constituent
Explanation: Non-ferrous alloys are those that do not contain iron as the main constituent, such as brass, bronze, and aluminum alloys.
6. An example of a non-ferrous alloy is: a) Stainless steel b) Cast iron c) Brass d) Carbon steel
Answer: c) Brass
Explanation: Brass is an alloy of copper and zinc, and it does not contain iron as the main constituent, making it a non-ferrous alloy.
7.Woods metal is a non-ferrous alloy primarily used for: a) Making tools b) Electrical wiring c) Soldering d) Casting sculptures
Answer: c) Soldering
Explanation: Woods metal is a non-ferrous alloy used for low-temperature soldering applications.
8. Duralumin is a non-ferrous alloy primarily composed of: a) Copper and tin b) Copper and zinc c) Aluminum and copper d) Aluminum and zinc
Answer: c) Aluminum and copper
Explanation: Duralumin is an aluminum alloy with copper as the main alloying element, often with small additions of other elements such as magnesium and manganese.
4.6 Classification of Alloys: Ferrous and Non-Ferrous Alloys
1. Ferrous alloys primarily contain: a) Iron b) Copper c) Aluminum d) Zinc
Answer: a) Iron
Explanation: Ferrous alloys primarily contain iron as the main constituent, along with other elements like carbon, manganese, and chromium.
2. Non-ferrous alloys do not contain: a) Iron b) Copper c) Aluminum d) Zinc
Answer: a) Iron
Explanation: Non-ferrous alloys do not contain iron as the main constituent, and they can include metals like copper, aluminum, zinc, and others.
3. Ferrous alloys are commonly used in applications such as: a) Building construction b) Electrical wiring c) Food packaging d) Jewelry making
Answer: a) Building construction
Explanation: Ferrous alloys, particularly steels, are commonly used in building construction due to their strength, durability, and resistance to corrosion.
4. Non-ferrous alloys are preferred for applications where: a) High strength is required b) Corrosion resistance is required c) Low cost is a priority d) Magnetic properties are essential
Answer: b) Corrosion resistance is required
Explanation: Non-ferrous alloys are preferred for applications where corrosion resistance is required, such as marine environments or chemical processing.
4.7 Ferrous Alloys: Composition, Properties, and Applications of Low Carbon, Medium Carbon, High Carbon Steels
1. Low carbon steel contains carbon content ranging from: a) 0.1% to 0.3% b) 0.3% to 0.6% c) 0.6% to 1.0% d) 1.0% to 2.0%
Answer: a) 0.1% to 0.3%
Explanation: Low carbon steel typically contains carbon content ranging from 0.1% to 0.3%, making it relatively soft and easily formable.
2. Medium carbon steel contains carbon content ranging from: a) 0.1% to 0.3% b) 0.3% to 0.6% c) 0.6% to 1.0% d) 1.0% to 2.0%
Answer: b) 0.3% to 0.6%
Explanation: Medium carbon steel typically contains carbon content ranging from 0.3% to 0.6%, offering a balance of strength and ductility.
3. High carbon steel contains carbon content ranging from: a) 0.1% to 0.3% b) 0.3% to 0.6% c) 0.6% to 1.0% d) 1.0% to 2.0%
Answer: d) 1.0% to 2.0%
Explanation: High carbon steel typically contains carbon content ranging from 1.0% to 2.0%, providing high strength and hardness but reduced ductility.
4. Applications of low carbon steel include: a) Structural components b) Cutting tools c) Springs d) Railway tracks
Answer: a) Structural components
Explanation: Low carbon steel is commonly used in structural components such as beams, columns, and plates due to its formability and weldability.
5. Applications of high carbon steel include: a) Springs b) Nuts and bolts c) Automobile bodies d) Electrical wires
Answer: a) Springs
Explanation: High carbon steel is often used in the manufacturing of springs, where high strength and resistance to deformation are required.
4.8 Non-ferrous Alloys: Composition, Properties, and Applications of Brass, Bronze, Duralumin, Tinman Solder, Woods Metal
1. Brass is an alloy primarily composed of: a) Copper and tin b) Copper and zinc c) Aluminum and copper d) Aluminum and zinc
Answer: b) Copper and zinc
Explanation: Brass is an alloy primarily composed of copper and zinc, offering good corrosion resistance and ductility.
2. Bronze is an alloy primarily composed of: a) Copper and tin b) Copper and zinc c) Aluminum and copper d) Aluminum and zinc
Answer: a) Copper and tin
Explanation: Bronze is an alloy primarily composed of copper and tin, known for its strength, corrosion resistance, and historical significance.
3. Duralumin is an alloy primarily composed of: a) Copper and tin b) Copper and zinc c) Aluminum and copper d) Aluminum and zinc
Answer: c) Aluminum and copper
Explanation: Duralumin is an aluminum alloy with copper as the main alloying element, known for its high strength-to-weight ratio and resistance to corrosion.
4. Tinman solder is an alloy primarily used for: a) Low-temperature soldering b) High-temperature welding c) Brazing d) Forging
Answer: a) Low-temperature soldering
Explanation: Tinman solder is an alloy primarily used for low-temperature soldering applications due to its low melting point.
5. Woods metal is an alloy primarily used for: a) Electrical wiring b) Plumbing c) Soldering d) Casting sculptures
Answer: c) Soldering
Explanation: Woods metal is an alloy primarily used for low-temperature soldering applications, particularly in electronics and plumbing.