The oxides of these metals can be reduced to metals by heating alone. (ii) Good electrical conductivity (iii) With chlorine, metals form chlorides which are electrovalent. It is especially effective when used on bearings operating in a warm, moist environment or in operations where a lot of water is needed to keep equipment cool. ferrous sulphate and zinc sulphate solutions respectively. (ii) can be easily cut with a knife. [citation needed]. (ii) Ores Pt & Cu are found in the free state. The lists do not show all contributions to every state ballot measure, or each independent expenditure committee Malleable : A metal that can be beaten into thin sheets on hammering is called malleable. Answer: The colour of ferrous sulphate is pale green which becomes colourless. The reactivity decreases in the order Mg > Al > Zn > Fe. Question 9. Work shall not be required to erect an air-supported temporary done beyond the point indicated in each successive membrane structure, a temporary stage canopy or a inspection without first obtaining the approval of tent having an area in excess of 35 m2. Standard ISO 6743-9 lubricants, industrial oils and related products (class L) classification part 9: family X (greases), first released in 1987 by the International Organization for Standardization, establishes a detailed classification of greases used for the lubrication of equipment, components of machines, vehicles, etc. Ways to prevent rusting of iron are : (b) By galvanizing. (c) III Define the following terms : (i) Mineral, (ii) Ore and (iii) Gangue. In other words, metal oxides that react wtih both acids and bases to form salt and water are called amphoteric oxides. (b) Sodium, potassium and lithium are stored under oil. Alloys are homogeneous mixtures of two or more metals, or a metal and a non-metal.E.g. Give reasons : Formation of Sodium oxide WebMultipurpose extreme pressure greases displaying both high melting point and water resistant characteristics. Solution: Click here to get started, Recommendation, Implementation and Support, ebook: Understanding Food & Beverage Lubricants, registering to purchase through this website, NLGI 2 (3752), NLGI 1 (3751), NLGI 0 (3750), NLGI 2 (1299), NLGI 1 (1298), NLGI 000 (1295), NLGI 2 (4025) also available as an aerosol spray, NLGI 1 (4024), NLGI 0 (4023), NLGI 00 (4022), NLGI 1 (4701), NLGI 0 (4702), NLGI 00 (4700), NLGI 2 (4072), NLGI 1 (4071), NLGI 0 (4070), NLGI 0 (453), NLGI 00 (452), NLGI 000 (451), Almagard Vari-Purpose Lubricant (3750-3752), Almatek General Purpose Lubricant (1232), Almaplex Industrial Lubricant (1274-1275), Almaplex Ultra-Syn Lubricant (1295-1299), H1 Quinplex Food Machinery Lubricant (4022-4025), Monolec Industrial Lubricant (4700-4702), Almasol High Temperature Lubricant (1250-1251), H1 Quinplex High Temperature Lubricant (4051), Pyroshield Syn Open Gear Grease (5100-5182), Wirelife Almasol Coating Grease (451-453), Lowering Energy Consumption Using Lubricants. (d) All the above. Can you play the detective to find out the nature of the solution he has used ? An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. Give reason Write equations for the reactions of WebMetal-Oxo and Metal-Peroxo Species Characterization, Orbital Description, and Reactivity Patterns of Transition-Metal Oxo Species In the Gas Phase Iron, ii. (a) NaCl solution and copper metal. Moist litmus paper? It also resists oxidation and vaporization, and repels water. Answer: Answer: Cartridge Synthetic Grease with Syncolon PTFE Super Lube Multi-Purpose Grease with Syncolon Super Lube Multi-Purpose Grease with Syncolon (PTFE) - 400 gram cartridge. By losing two electrons, the two sodium atoms form two sodiumions (2Na+). It is preferred over lithium carbonate as a precursor for lithium nickel manganese cobalt oxides.[14]. Copper iii. Malleable is being able to be beaten/hammered into thin sheets. It provides dependable performance in a broad operating temperature range in chassis, wheel bearings and other critical grease points. (c) CU(NO3)2 Solution: Answer: Question 3 Zinc is more reactive (more electro positive) than iron. It is usually applied using small lip-balm/lip-stick like applicators. According to Bloomberg, Ganfeng Lithium Co. Ltd.[10] (GFL or Ganfeng)[11] and Albemarle were the largest producers in 2020 with around 25kt/y, followed by Livent Corporation (FMC) and SQM. iii. Solution: ii. Kerosene is a low-viscosity, clear liquid formed from hydrocarbons obtained from the fractional distillation of petroleum between 150 and 275 C (300 and 525 F), resulting in a mixture with a density of 0.780.81 g/cm 3.It is miscible in petroleum solvents but immiscible in water. +44 (0)1480 272279 (d) Good thermal conductivity, malleability, light weight and high melting point are the properties/of aluminium due to which it-is used for making cooking utensils. (iii) Gangue : The unwanted impurities like sand, rocky material, earth particles, lime stone, mica, etc in an ore are called gangue. Silicone greases are generally thickened with silica. (a) Applying grease Mg(s) + 2HCl(aq) MgCl2(aq) + H2(g) Metal + HNO3 H2 not evolved. Kerosene is a low-viscosity, clear liquid formed from hydrocarbons obtained from the fractional distillation of petroleum between 150 and 275 C (300 and 525 F), resulting in a mixture with a density of 0.780.81 g/cm 3.It is miscible in petroleum solvents but immiscible in water. Question 19 LE greases offer varying benefits such as reduced wear, reduced operating temperatures, longer equipment life, enhanced performance, increased efficiency, increased uptime, lower grease consumption, longer service intervals and reduced maintenance. Typical Applications: Wire rope, chain links, pins, bushings, cable sheave bushings, cables, open and closed silent and roller chains, and small, slow-turning gearboxes that require a semifluid lubricant, Available Grades: NLGI 0 (453), NLGI 00 (452), NLGI 000 (451). Magnesium 1 day ago. Formulated for use in food processing applications, H1 Quincal Syn FG Grease features a synthetic base fluid, calcium sulfonate complex thickener, and Quinplex, LEs proprietary impact-resistant additive. Electrolyte Metal salt solution. Its tacky, water-resistant characteristics enable it to adhere strongly to rapidly moving parts, seal out damaging moisture, protect against premature wear and shield metal against corrosive attack. A MESSAGE FROM QUALCOMM Every great tech product that you rely on each day, from the smartphone in your pocket to your music streaming service and navigational system in the car, shares one important thing: part of its innovative design is protected by intellectual property (IP) laws. (d) AgNO3 solution and copper metal. Switching to H1 Quinplex Food Machinery Lubricant results in longer bearing life, fewer equipment repairs, less downtime and lower lubricant consumption. An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal. Solution: (a) zinc is costlier than tin Those minerals from which a metal can be profitably extracted are called ores. Which of the following properties of aluminium are responsible for the same? The metals are deposited at the cathode whereas chlorine is liberated at anode. E.g. (ii) Zn is more reactive than Fe, so it displaces iron as follows: Metals and nonmetals class 10 Question 5. H1 Quinplex High Temperature Lubricant is a clay-thickened grease designed to withstand high temperatures, staying in place to provide constant lubrication. Explain why the surface of some metals acquires a dull appearance when exposed to air for a long time. Similarly silver becomes black due to the formation of black Ag2S and Aluminium forms a white coating of Al2O3 on its surface. After sufficient force to shear the grease has been applied, the viscosity drops and approaches that of the base lubricant, such as the mineral oil. Metals replace hydrogen from dilute acids, where as non-metals do not. Give two examples of amphoteric oxides. An element reacts with oxygen to give a compound with a high melting point. Answer: The Patent Public Search tool is a new web-based patent search application that will replace internal legacy search tools PubEast and PubWest and external legacy search tools PatFT and AppFT. Fe(s) + H2SO4(aq) FeSO4(aq) + H2(g). It is nonmetallic and tetravalentits atom making four electrons available to form covalent chemical bonds.It belongs to group 14 of the periodic table. The monohydrate loses its water at 100110C. How do metals react with solutions of other Metal Salts, Extracting Metals in the Middle of the activities Series, Extracting Metals towards the top of the Activity Series. (d) IV What are the ions present in these compounds? Lithium hydroxide (isotopically enriched in lithium-7) is used to alkalize the reactor coolant in pressurized water reactors for corrosion control. What are alloys ? However, they dissolve in many organic solvents. In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte? Carbonate and sulphide ores are usually converted into oxides during the process of extraction. (b) carbon Almaplex Industrial Lubricant is a versatile wear-reducing aluminum complex grease that protects equipment from moisture & heat. Answer: DePaul University does not discriminate on the basis of race, color, ethnicity, religion, sex, gender, gender identity, sexual orientation, national origin, age, marital status, pregnancy, parental status, family relationship status, physical or mental disability, military status, genetic information or other status protected ii. At anode2Cl Cl2+ 2e When non-metals combine with oxygen it forms either neutral or acidic oxides. Reactive metals can displace less reactive metals from their compounds in solution or molten state. Solution: The calcium sulfonate complex thickener provides additional performance features that make this grease desirable for a variety of extreme conditions. Write equations for the reactions of WebMonolec Multiplex Lubricant is a highly versatile, long-life, lithium complex thickened grease designed for extreme pressure (EP) performance in a variety of farm, fleet, industrial and marine applications. Monolec Multiplex Lubricant is a highly versatile, long-life, lithium complex thickened grease designed for extreme pressure (EP) performance in a variety of farm, fleet, industrial and marine applications. Included in the LE grease line are technologically advanced, highly versatile, general purpose, multifunctional, and extreme pressure (EP) varieties, all of which outperform conventional greases. What happens when metals are burnt in air? It is great for electric motor applications. Solution: Question 10. (a) By painting It is specially formulated to provide exceptional protection at temperatures at which petroleum oils would completely oxidize (or carbonize). The measure of the consistency of grease is commonly expressed by its NLGI consistency number. (ii) Show the formation of Na2O and MgO by the transfer of electrons. Aqueous solutions of zinc sulphate and iron sulphate were taken in test tubes I and II by four students A, B, C and D. Metal pieces of iron and zinc were dropped in the two solutions and observations made after several hours were recorded in the form of table as given below: Which student has given the correct report? (iii) Silver [6], Some greases are labeled "EP", which indicates "extreme pressure". Metals and Nonmetals Class 10 Question 1. (a) What will be the action of gas on An alternative route involves the intermediacy of lithium sulfate:[8][9]. (i) Non-metals form acidic or neutral oxides. (ii) Sodium (a) Colour of CuSO4 solution is blue and FeSO4 solution is light green. Reactivity of an element can be explained as tendency to attain a completely filled outermost shell. Fatty oil-based greases have also been prepared with other thickeners, such as tar, graphite, or mica, which also increase the durability of the grease. Answer: Class 10 Metals and Non Metals NCERT Book Page Number: 53. Which of the following methods is suitable for preventing an iron frying pan from rusting ? (b) Because of malleability, metals can be casted into sheets. (iii) Arrange the metals A, B, C and D in the order of decreasing reactivity. HCl and cone. Question 2 The carbonate ores are changed into oxides by heating strongly in limited air which is known as calcination. WebThe salt is a typical ionic compound i.e a brittle solid with a high melting point. Hence, the decreasing order of reactivity of the metals is B > A > C > D. Question 4 Question 4. the fire code official. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12, Metals and nonmetals class 10: The NCERT Solutions for Class 10 Science is designed to provide a strong foundation for further studies in science. (d) zinc is more reactive than tin. WebSodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. (b) Sodium, potassium and lithium are very reactive and catch fire when exposed to air. Due to this, ionic compounds have high melting points. For e.g. This quality makes clean-up with pentane or hexanes trivial, but also easily leads to contamination of reaction mixtures. [7][8] Solid additives cannot be used in bearings because of tight tolerances. (d) It is easier to reduce a metal oxide into free metal. In the Water Spray-Off Test, competitive greases lost almost six times more grease. What chemical process is used for obtaining a metal from its oxide. Explain why these sour substances are effective in cleaning the vessels. (b) Au (c) CuSO4 green; FeSO4 blue (c) Cu They are more commonly known as lithium soaps. An element reacts with oxygen to give a compound with a high melting point. Get Smart with Money 2022 720p WEBRip 800MB x264-GalaxyRG Which gas is produced when dilute hydrochloric acid is added to a reactive metal ? (d) C Question 16 Those metal oxides which show basic as well as acidic behaviour are known as amphoteric oxides. (a) Al By losing 2 elections, the magnesium atoms form a magnesium ion (Mg2+) and by gaining 2 electrons, the oxygen atom forms an oxide ion (O2-). Answer: They do not have shining surface except iodine. 98% of products ordered ship from stock and deliver same or next day. Electrolyte is a suitable salt solution of metal M. Question 4 When metals are connected into circuit using a battery, bulb, wires and switch, current passes through the circuit and the bulb glows. Na, Mg, & Ca are obtained by the electrolysis of their molten chlorides. (a) CuSO4 (i) dry litmus paper ? Amphoteric oxides are the oxides, which react with both acids and bases to form salt and water. Answer: Answer: Name two metals, which will displace hydrogen from dilute acids, and two metals which will not. It provides dependable performance in a broad operating temperature range in chassis, wheel bearings and other critical grease points. Lithium-based greases are the most commonly used; sodium and lithium-based greases have higher melting point (dropping point) than calcium-based greases but are not resistant to the action of water. Two sodium atoms transfer their 2 outermost electrons to an oxygen atom. which is a compound that's highly resistant to corrosion and has a high melting point. HNO3 in the ratio of 3 : 1 is known as aqua-regia. (d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction. (c) silicon This reaction is used to join railway tracks or cracked machine parts and is known as the thermit reaction. Ni, & Cr), amalgam (alloy of Hg), brass (alloy of Cu & Zn) etc. Gold and platinum and other noble metals do not corrode in air. (d) CuSO4 green; FeSO4 colourless When non-metals (like sulphur) are connected, the bulb does not light up at all. These minerals are formed as a result of chemical changes taking place during the formation of earth. Apiezon or similar hydrocarbon based greases are the cheapest, and most suitable for high vacuum applications. He promised to bring back the glitter of old and dull gold ornaments. (Not for wheel bearings and automotive chassis applications.). (iv) Fligh melting point [NCERT Exemplar] The results obtained have been tabulated as follows : Use the Table above to answer the following questions about metals A, B, C and D. Write the electron dot structures for sodium, oxygen and magnesium. Cations & anions attract each other & are held by strong electrostatic force of attraction. (i) Mercury Solution: [10] Significant new capacity is planned, to keep pace with demand driven by vehicle electrification. Mg & Mn react with very dil. Grease generally consists of a soap emulsified with mineral or vegetable oil. WebAll 1080p Micro 1080p Micro 720p Micro 2160p Xvid. (a) D Pratyush took sulphur powder on a spatula and heated it. The processes used for removing the gangue from the ore are based on the differences between physical or chemical properties of the gangue and the ore. It features low bleed characteristics, excellent pumpability and great oxidation resistance. Mercury is a poor conductor of heat. [14], New location: Navigate to USACE Home > [Publications] > [Engineer Manuals] > [EM 1110-2-1424 Lubricants and Hydraulic Fluids]. It is composed of hydrocarbon molecules that typically The element is likely to be Therefore, when zinc is added to a solution of iron (II) sulphate, then the greenish colour of iron (II) sulphate solution fades gradually due to the formation of colourless zinc sulphate solution and iron metal is deposited on zinc. What is the colour of aqueous solution of CuSO4 and FeSO4 as observed in the laboratory? It is composed of hydrocarbon molecules that typically Lithium grease is formed by mixing lithium soap and oil. Carbon in the form of graphite conducts electricity, as there is a free electron in each carbon atom, which moves freely in between the hexagonal layers. (i) Metals above hydrogen in the activity series like sodium and magnesium displace hydrogen from dilute acids. So. (a) Platinum, gold and silver are used to make jewellery. They are relatively inert and generally do not affect reactions, though reaction mixtures often get contaminated (detected through NMR near 0[13]). The metal oxides are then reduced to the corresponding metals by using suitable reducing agents such as carbon. (a) I Question 13 Typical Applications: High-temperature applications, including: asphalt plants, brick/ceramic kilns, exhaust fans, kiln car bearings, lime kilns, oven conveyors, pellet mills, plastics and soot blowers, Available Grades: NLGI 2 1/2 (1250), NLGI 1 (1251). Question 9 Sodium metal is kept immersed in kerosene to prevent their reaction with oxygen, moisture and carbon dioxide of air. This premium combination imparts a very high dropping point, exceptional inherent extreme pressure (EP) characteristics, superior mechanical stability, low oil bleed, tackiness and water resistance everything you need to protect and extend the life of your equipment. ii. Similarly potassium and bromine form potassium bromide KBr, or lithium and iodine form lithium iodide LiI. Question 13. Physical Properties of Metals & Non-Metals. (ii) Metals below hydrogen in the activity series like copper, silver do not displace hydrogen from dilute acids. Formation of Magnesium oxide All minerals are not ores but all ores are minerals. It is especially effective when used on bearings operating in a warm, moist environment or in operations where a lot of water is needed to keep equipment cool. In 2012, the price of lithium hydroxide was about $5-6/kg. i. Mercury is in liquid state at room temperature. (ii) Moist litmus paper becomes red. To learn more about our industrial greases, please contact LE today. It is a distinctive red color, which shows when fresh lubricant forces out old material. They are more flexible and often used in demanding environments due to their inertness. (i) Copper is a better conductor of heat than steel. Answer: (c) Applying a coating of zinc. Copper does not react with dilute hydrochloric acid at all. Samples of four metals A, B, C and D were taken and added to the following solution one by one. Its robust aluminum complex formulation seals out water and other contaminants that can wreak havoc on the long-term life of equipment. It is a clay (bentone) thickened grease and is designed to withstand high temperatures, staying in place to provide constant lubrication. WebGrease is a solid or semisolid lubricant formed as a dispersion of thickening agents in a liquid lubricant. What would you observe when zinc is added to a sodium of iron(II) sulphate? Calcium sulphonates and polyureas are increasingly common grease thickeners not based on metallic soaps.[4][5]. (b) CuCO3 Answer: "Sinc Enrichment of Ores Solution: Under high pressure or shock loading, normal grease can be compressed to the extent that the greased parts come into physical contact, causing friction and wear. This compound is also soluble in water. What are amphoteric oxides ? The elements or compounds, which occur naturally in the earths crust, are known as minerals. This high-performance grease is intended for long-lasting use in heavy-duty mobile equipment such as that used in construction, agriculture, open pit mining and road-building. There 92 well known naturally occurring minerals of which 70 are metals and rest 20 are the non-metals. It dramatically lengthens grease intervals, eliminates bearing failures, can extend bearing life by up to threefold, and does not harden with age. Answer: Our greases go through a rigorous quality process to ensure consistency and performance from batch to batch with greases manufactured in Wichita, Kan. WebThe melting point of a solid can also be measured using the apparatus shown in Figure 2.7. Non-metals cannot be beaten with a hammer to form thin sheets. [17] Long lasting. Available Grades: NLGI 2 (1275), NLGI 1-1/2 (1274). But steel corrodes easily. Fluoroether-based greases are inert to many substances including solvents, acids, bases, and oxidizers. Answer: Food-grade greases are those greases that come in contact with food. If you find any doubts regarding this article or NCERT solutions for class 10 science chapter 3 Metals and Non Metals, leave your comments in the comment section below and we will get back to you as soon as possible. You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. A popular lithium grease thickener is lithium 12-hydroxystearate, which produces a general-purpose lubricating grease due to its high resistance to water and usefulness at a range of temperatures. Answer: (c) Aluminium forms a non-reactive layer of aluminium oxide on its surface. Hydrochloric acid reacts with metals above hydrogen in the reactivity series H1 Quincal is robust enough to handle elevated temperatures and other harsh conditions found at food manufacturing plants, resulting in longer bearing life, fewer equipment repairs, less downtime and lower lubricant consumption. Ion-based grease may come in the form of lithium, white lithium, and calcium. Question 12. Answer: WebUnder the Pollution Prevention Act of 1990 (PPA), TRI collects information to track industry progress in reducing waste generation and moving towards safer waste management alternatives. Grease is a solid or semisolid lubricant formed as a dispersion of thickening agents in a liquid lubricant. Almasol High Temperature Lubricant is good for bearings operating in or near heat-generating equipment that are subject to temperatures that cause ordinary greases to melt and run, leaving critical bearing surfaces unprotected. This is why ionic compounds have high melting points. Ductile is being able to be drawn into thin wires. steel, brass, bronze, etc. Candidates who are searching for NCERT Solutions for Class 10 Science Chapter 3 Metals And Non Metals questions and answers can refer to the class 10 science chapter 3 notes below. Solution: Question 3 [9] Over the centuries, all manner of materials have been employed as greases. WebWelcome to Patent Public Search. Can you play the detective to find out the nature of the solution he had used? It is intended for use in severe conditions such as high temperatures, heavy loads and water. In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte ? However the maximum usable temperature for lithium-based grease is 120 C. They loss e- & gains positive charge & are tenned as cation. [CBSE2011] A student took four test tubes I, II, III and IV containing aluminium sulphate, copper sulphate? Poor conductor of heat and electricity except graphite. (ii) Copper does not corrode easily. Gold and Platinum. WebThe AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos. Explain the meanings of malleable and ductile. Name two metals that are found in nature in the free state. They are, however, expensive, and are not easily cleaned away. Question 24 | | |, Class 10 Metals and Non Metals NCERT BookPage Number: 46. Give an example of a metal which : Solution: However, Cu & Ag are also found in the combined state as their sulphide or oxide ores. i. is a liquid at room temperature. Typical Applications: Industrial: bearings (anti-friction, conveyor, fan, heavily loaded ball, high-speed, plain, roller element, slow-speed), forging equipment, machine tools, presses, rolling mills and rotary aerators. For e.g. Typical Applications: Chassis, wheel bearings, front axle arrangements, U-joints, bucket pins, bearings, Available Grades: NLGI 2 (3752), NLGI 1 (3751), NLGI 0 (3750). Write a balanced chemical equation for the reaction taking place. (c) No change in colour of FeSO4 Silicone grease is based on a silicone oil, usually thickened with amorphous fumed silica. Aluminium oxide and zinc oxide are amphoteric in nature. For example, petroleum jellies such as Vaseline are not generally classified as greases. Metals and nonmetals class 10Question 3. do not displace hydrogen from dilute acids. Metals and nonmetals class 10 Question 7. These CBSENCERT Solutionswill not only help in your Class 10 exam preparation but also in clearing other competitive exams. and its NLGI consistency number.[12]. So it is kept immersed in kerosene oil to prevent its reaction with oxygen, moisture and carbon dioxide of air to prevent accidental fires. Reactivity Series: List of metals in order of their decreasing activities. Question 3. Yes, every mineral has a definite and a fixed composition. (b) zinc has a higher melting point than tin Solution: These displace metals of low reactivity from their oxides. Metals and nonmetals class 10Question 6. Lubrication Engineers offers a full line of high-performance industrial greases. For example, zinc oxide is reduced to metallic zinc by heating with carbon. Question 1 It remains unaffected by boiling water and steam. The displacement will take place in the following cases : Question 2 Aqua regia (By volume, this contains 3 parts of concentrated hydrochloric acid and 1 part of concentrated nitric acid) is the solution, which is used to sparkle the bangles like new, but their weight will be reduced drastically. (a) Metals can be beaten into thin sheets with a hammer without breaking. Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called gangue. The latter, anhydrous hydroxide, is preferred for its lower mass and lesser water production for respirator systems in spacecraft. HNO3 and a mixture of cone. (i) is a liquid at room temperature. Class 10 metals and nonmetals Question 18 Wirelife Almasol Coating Grease is a soft, semifluid calcium-based grease designed to coat wire rope as well as moving chain and cable parts to ensure long life and smooth, quiet operation. NSF H1 certified, it is a suitable lubricant for use in food processing and other sensitive environments. Answer: Solution: Question 26 Name two metals, which can form hydrides with metals. Protective metal oxide layer prevents the metal from further oxidation such as found in Al, Zn, Pb etc. These are highly resistant to corrosion. Another commonly used poly- olefin base oil as well The United States Department of Agriculture (USDA) has three food-grade designations: H1, H2 and H3. ii. Jointly developed by ASTM International, the National Lubricating Grease Institute (NLGI) and SAE International, standard ASTM D4950 standard classification and specification for automotive service greases was first published in 1989 by ASTM International. Again note the group formula pattern. Features such as these make LE greases effective for a wide variety of industrial and fleet applications, including high-temperature and high-moisture operations and extended service under extreme conditions. Lithium hydroxide is an inorganic compound with the formula LiOH. The grease helps to prevent joints from "freezing", as well as ensuring high vacuum systems are properly sealed. Write the chemical reaction when iron reacts with dilute H2SO4. WebA construction permit is 106.2.2 Appr oval required. Does every mineral have a definite and a fixed composition? Which metals do not corrode easily ? Solution: It is good for use on large open gears exposed to very high temperatures and is also recommended for use on kiln girth gears, large industrial gearing, oven chains, sliding surfaces, large slow moving (friction) bearings and similar applications. Write chemical equations that show aluminium oxide reacts with acid as well as base. Metals and nonmetals class 10Question 1. is a poor conductor of heat. Sodium hydroxide is a highly caustic base and alkali that decomposes proteins at ordinary ambient temperatures and may cause severe chemical It is especially effective when severe industrial operating conditions such as extreme temperatures and high speeds are present. (b) II Reason- HNO3 is strong oxidizing agent & oxidized H2 to water. These minerals arc called ores. are used as reducing agents. Question 7. (d) Zinc is more reactive than tin. (b) S(s) + O2(g) > SO2(g), Multiple Choice Questions (MCQs) [1 Mark each]. A man went door to door posing as a goldsmith. In some cases, the lubrication and high viscosity of a grease are desired in situations where non-toxic, non-oil based materials are required. Almatek General Purpose Lubricant is a lithium hydroxy 12 grease that offers long-lasting protection, versatility and performance. Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of zinc. When an aluminium strip is kept (a) Green solution of FeSO4 slowly turns brown Question 1 Metals are electropositive in nature. By applying oil or grease to the surface of iron objects so that supply of air consisting of moisture is cut off form the surface. H3 lubricants are food-grade lubricants, typically edible oils, used to prevent rust on hooks, trolleys and similar equipment. (ii) Sulphur dioxide gas turns moist blue litmus paper to red. While toilet soaps are used in domestic cleaning, lithium soaps are components of lithium grease. These acids dissolve the coating of copper oxide or basic copper carbonate present on the surface of tarnished copper vessels and makes them shining red-brown again. Answer: The four students A, B, C and D recorded their observations in the form of a table as given below: Which student has recorded the correct observation? H1 lubricants are food-grade lubricants used in food-processing environments where there is the possibility of incidental food contact. Lithium hydroxide is often produced industrially from lithium carbonate in a metathesis reaction with calcium hydroxide:[7]. Salts other than the carbonate have been used, but the carbonate salt is The main elements of standard ATSM D4950 and NLGI's consistency classification are reproduced and described in standard SAE J310 automotive lubricating greases published by SAE International. (d) (i) and (iv) When magnesium reacts with oxygen, the magnesium atom transfers its two outermost electrons to an oxygen atom. Class 10 Metals and Non Metals NCERT Book Page Number: 49. darkening of silver articles when exposed to air, gaining of green coat on copper, rusting of iron. They are soluble in water and slightly soluble in ethanol. This shows that copper is even less reactive than iron. Almaplex Ultra-Syn Lubricant is a heavy-duty synthetic grease that provides optimum performance under extreme operating conditions. CO is a neutral oxide; N2O5 or N2O3 is an acidic oxide. Question 15. Silicone-based greases are cheaper than fluoroether-based greases. Almaplex grease protects against oxidation, rust and corrosion. (c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking. Features of LE greases, which vary depending on the type of grease, include exceptional load-carrying ability, high dropping point, low evaporation rate, low oil separation and mechanical stability. Our specialists are available to advise you about the best products. Can be beaten into thin sheets. These metals such as Fe, Zn, Pb, Cu, etc are moderately reactive & are usually present as sulphides or carbonates in nature. These metals are the least reactive & are often found in a free state for e.g. White; Useful resources. Question 2. Typical Applications: Open gears (kiln girth gears), low speed plain bearings, oven chains, cables, and sliding surfaces operating in a high-temperature environment. Question 2 What will be the action of this gas on: ZnO and Al2O3. International Organization for Standardization, Society of Tribologists and Lubrication Engineers, 10.2993/0278-0771(2006)26[299:BSAAAG]2.0.CO;2, https://en.wikipedia.org/w/index.php?title=Grease_(lubricant)&oldid=1112459147, Articles with unsourced statements from November 2020, Articles with unsourced statements from June 2012, Wikipedia articles incorporating text from Grocer's Encyclopedia, Creative Commons Attribution-ShareAlike License 3.0, LA and LB: chassis lubricants (suitability up to mild and severe duty respectively), GA, GB and GC: wheel-bearings (suitability up to mild, moderate and severe duty respectively), This page was last edited on 26 September 2022, at 12:22. Gold (Au) and platinum (Pt) dissolve only in aqua-regia as these metals are very less reactive. can be easily cut with a knife. Physical Properties of Metals And Non-Metals. What happens when metals react with water? This layer prevents aluminium to react with other substances. Almaplex 1299 & 1298 (NLGI grades 2 & 1, respectively) provide 73 percent higher extreme pressure (EP) performance than competitive grease, as indicated by the results of the Four Ball EP Test. 2 mL each of cone. However the maximum usable temperature for lithium-based grease is 120 C. The dishonest goldsmith dipped the gold bangles in aqua-regia (which contains 1 part of concentrated nitric acid and 3 parts of concentrated hydrochloric acid, by volume). In MgO, ions present are Mg2+ and O2-. H1 Quinplex Food Machinery Lubricant is a semi-synthetic grease suitable for a broad operating temperature range. Question 22 Question 1 (iii) With chlorine, non-metals form chlorides which are covalent. It is good radiation protection against free neutrons. Metallic oxides of zinc, magnesium and copper were heated with the following metals : In which cases will you find displacement reactions taking place ? (c) FeSO4 solution and silver metal. Answer: Question 3 1275 Grease Commodore Marine Service, Inc. 1282 Grease Waste Management / Alliance Landfill, 3752 Grease Pittsgrove Dept. Question 15 [13], Lithium hydroxide is mainly consumed in the production of cathode materials for lithium ion batteries such as lithium cobalt oxide (LiCoO2) and lithium iron phosphate. (iii) Ductility For e.g. (b) Applying paint. The initially produced hydrate is dehydrated by heating under vacuum up to 180C. Chapter 3 Metals and Non Metals, is derived from the NCERT textbook of Class 10 Science as prescribed in CBSE Schools of India. (d) Pt (b) CuSO4 blue; FeSO4 dark green Patented NLGI grade 2 heavy-duty, multipurpose synthetic lubricant. Explain the meaning of malleable and ductile. 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