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Fe → Fe2O3.xH2O The oxidation number of Cl in Cl2O7 is Which of the following processes does not involve oxidation of iron? Explanation: These species can react further to form many products. Question 19. (a) + 7 Explanation: to +0.402 V. D can oxidise itself and reduce other. Which of the following processes does not involve either oxidation or reduction? (b) 2 (b) When Number of moles of electrons Lost or gained by one mole of reductant or oxidant is not same. Find out information about Muntz Metal. i.e., it is a measure of the relative tendency to undergo oxidation (loss of electrons) or reduction (gain of electrons). Engineering Materials MCQ question is the important chapter for a Mechanical Engineering and GATE students. Its original application was as a replacement for copper sheathing on the bottom of boats, as it maintained the anti-fouling abilities of the pure copper at around two thirds of the price. Water automatically gets oxidised to hydrogen peroxide. It is used to make machine parts that require resistance to corrosion. Ans: c. 2. The process is relevant to many phenomena including aging, paint, and spoilage of foods, degradation of petrochemicals, and the industrial production of chemicals. Reduction potential of D is minimum i.e. 4) In precipitation hardening, at 540 o C when θ phase (CuAl 2) completely dissolves at grain boundaries the single phase α is obtained known as ____ a. saturated solid solution b. homogeneous solid solution (b) 4.5 (0) (+2). Question 12. (c) 4 (a) Dissolution of Copper (b) Liberation of H2 from steam by iron at high temperature. (d) none of the above, Answer: (a) Increase in oxidation number C280 Muntz is most commonly found in sheet and plate form. Muntz metal is a brass alloy invented in the 19th century. Which of the following is not treated as primary standard in the volumetric analysis? Muntz died in 1857, to be succeeded by his eldest son, also called George Fredrick, who sold it in 1864 to a joint stock company, Muntz's Metal Co. Ltd. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in A? Silicon when added to copper improves. (d) KMnO4. (a) Capacitive Proximity (b) Magnetic Proximity (c) Inductive proximity (d) Parallel Proximity ANS-a 40) _____ detects metals but along with it can also detect resins, liquids. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. The addition of which of the following improves machining of copper? Also known as high-leaded naval brass, 485 brass contains lead for good machinability. Explanation: Ques.18. Engineering Materials MCQ question is the important chapter for a Mechanical Engineering and GATE students. The optical instrument used for the comparison of candle power of different sources are known as Mn(25) = [Ar]3d5 4s2, 4p0 Addition of O2 or electronegative element One mole of N2H4 loses ten moles of electrons to form a new compound A. In both Fe and Fe(CO)5, the oxidation state of iron is zero. Ans: a. Muntz metal is a form of alpha-beta brass with about 60% copper, 40% zinc and a trace of iron. Critical humidity B. Humidity rate C. Environmental humidity D. Atmospheric humidity 73. A 60/40 type of brass composed of 58-61% copper, up to 1% lead, and remainder zinc. (a) -1 Q5. (d) D. Answer: (d) D So taken both nitrogen atoms in account gives oxidation number -4. Ductility of a material can be defined as (a) ability to undergo large permanent deformations in compression (b) ability to recover its original form (c) ability to undergo large permanent deformations in tension (d) all of the above (e) none of the above. Feel free to consult with us to discover the sheets that are perfect for your projects. 2 + x + 6(−2) = 0, Autoxidation is any oxidation that occurs in presence of oxygen. Muntz's new metal contained more copper, less zinc, and a bit of iron not present in a similar 56:44 alloy patented by William Collins in 1800. It was found that copper would gradually leach from the alloy in sea water, poisoning any organism that attempted to attach itself to a hull sheathed in the metal. team These too proved a success as they not only were cheaper but also very strong and lasted longer. (c) CrO2-4 → Cr2O2-7 Here, in this reaction N2 = Normality of copper (II) carbonate = (0.5×2)/(123.5) N (b) -3 (b) K2MnO4 As an example of their success in entering the market, 50 ships were metalled with Muntz Metal in 1837, over 100 in 1838, doubling in 1840 and doubling again by 1844. (a) LiNO 3 (b) NaNO 3 (c) KNO 3 (d) RbNO 3. Specific mass ratio B. In Na → Na2+, Na is oxidised from to +1 oxidation state. KI + 2KMnO4 + H2O → KIO3 + 2 KOH + 2 MnO2 This device is used in phase controlled converters, inverters, battery chargers, and cyclo-converters. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material (b) Reduction Potential Oxygen size is small hence its more electronegative and show -2 oxidation states. rusting (b) Oxidation of Ag+ → Ag The oxidation number of Mn is maximum in (d) Zn2+ →Zn. Explanation: Muntz metal is an alpha-beta brass which is composed of 60% copper and 40% zinc. When copper turnings are added to silver nitrate solution, the solution becomes brown in color after sometime because copper is more reactive than silver so it displaces silver from silver nitrate solution and form copper nitrate solution. (c) Iron Mn+ + ne– → M (reduction potential), Question 4. 14. V1 = Volume of H2SO4 (b) -3 (b) Na → Na+ In 1921 the company was bought by Elliott's Metal Company, which became part of ICI's Imperial Metals division (now IMI plc) in 1928. It is commonly used for marine hardware, valve stems, and screw machine products. As oxygen is more electronegative than Cl. (d) Silver, Answer: (b) Magnesium N1V1 = N2V2 The process of removing metal by a cutter which is rotated against the direction of travel of workpiece, is called (A) Up milling ... I.C Engines Multiple Choice Questions with Answers - Set 02. (a) Inductive proximity (b) Capacitive Proximity A notable use of Muntz Metal was in the hull of the Cutty Sark.[3]. (b) Formation of H2O2 by the oxidation of H2O. (a) Formation of H2O by the oxidation of H2O2. Explanation: Hence, maximum oxidation sate exhibited by Mn is +7 which is in KMnO4. If equal volumes of 1M KMnO4 and 1M K2Cr2O7 solutions are allowed to oxidize Fe2+ in acidic medium. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 8 Redox Reactions with Answers Pdf free download. Explanation: x = +7 hence oxidation state of Cl is +7. It is named after George Fredrick Muntz, a metal-roller of Birmingham, England, who commercialised the alloy following his patent of 1832. (c) Rusting of iron sheets. Therefore, oxidation number of 2 nitrogen atoms in compound Y is +6. (c) Equal with both oxidising agents (b) 6 Concise Mathematics Class 10 ICSE Solutions 2018, MCQ Questions for Class 11 Chemistry with Answers, CBSE Important Extra Questions for Class 11 Political Science Chapter Wise, Class 11 History Important Questions Chapter 11 Paths to Modernization, Class 11 History Important Questions Chapter 10 Displacing Indigenous Peoples, CBSE Important Extra Questions for Class 12 Accountancy Chapter Wise, Class 11 History Important Questions Chapter 9 The Industrial Revolution, Class 11 History Important Questions Chapter 8 Confrontation of Cultures, Class 11 History Important Questions Chapter 7 Changing Cultural Traditions, Class 11 History Important Questions Chapter 6 The Three Orders, Class 11 History Important Questions Chapter 5 Nomadic Empires, Class 11 History Important Questions Chapter 4 The Central Islamic Lands, Concise Mathematics Class 10 ICSE Solutions. C28000 Muntz Metal is commonly used in Muntz metal is a form of alpha-beta brass with about: 60% copper; 40% zinc; A trace of iron; The plates we offer are not just varied in terms of thickness, they also vary in alloy/composition. Muntz metal is a form of alpha-beta brass with about 60% copper, 40% zinc and a trace of iron. Each nitrogen atom has -2 oxidation number. the change in the oxidation state (or number) or n factor is greater with KMnO4 The tendency of an electrode to lose electrons is known as Also, 50 mL of 0.1 M C2H2O4 equivalent to 5 mol of C2O42- M → Mn+ + ne– (oxidation potential) Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Question 20. [4], Muntz's US Patent, issued on October 22, 1832, was among the thousands destroyed in the December 15, 1836 Patent Office fire but was reported in Volume 12 (New Series) of the Journal of the Franklin Institute at p. 195 (1833), http://hdl.handle.net/2027/uva.x002092353?urlappend=%3Bseq=203, National Pollutant Inventory - Copper and compounds fact sheet, Improved manufacture of bolts and fasteners, https://en.wikipedia.org/w/index.php?title=Muntz_metal&oldid=991251277, Creative Commons Attribution-ShareAlike License, This page was last edited on 29 November 2020, at 02:43. Explanation: The electronic configuration of Mn is: Answer: (b) Formation of H2O2 by the oxidation of H2O. Certificates with a traceable lot number are available for these products. Thus all the given metals react with dilute acids. (c) Both (1) and (2) are true A standard reduction electrode potentials of four metals are A = -0.250 V, B = -0.140 V, C = -0.126 V, D = -0.402 V The metal that displaces A from its aqueous solution is: CaO + H2​O →Ca(OH)2 (d) – 7. (b) More with K2Cr2O7 The Following Section consists Multiple Choice Questions on Engineering Materials. We have provided Redox Reactions Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. It is almost unmachinable (c) is produced by annealing process. Page-11 section-4 Learn Engineering Materials MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. 6. List some bronze alloys. (c) C Explanation: Page-11 section-4 Learn Engineering Materials MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. This contains 20 Multiple Choice Questions for Mechanical Engineering Sheet Metal Operations - MCQ Test 1 (mcq) to study with solutions a complete question bank. It is named after George Fredrick Muntz, a metal-roller of Birmingham, England, who commercialised the alloy following his patent of 1832.. We hope the given NCERT MCQ Questions for Class 11 Chemistry Chapter 8 Redox Reactions with Answers Pdf free download will help you. b) Bronze. Oxidation number of Fe in Fe(CO)5 is zero. Which of the following reactions does not involve either oxidation or reduction? MCQs on Metallography, Cooling curves, Iron-Carbon diagram, Hardenability, Corrosion & Copper alloys.1 mark is awarded for each correct answer and 0.25 mark will be deducted for each wrong answer. b) Hardness. The process in which carbon and nitrogen both are absorbed by the metal surface to get it hardened is known as ... flame hardening carburising None. They and other partners then fixed the prices of the alloy at £18 per ton lower than the market price for the equivalent copper product, serving to establish Muntz Metal as the sheathing of choice where transport costs still kept it as an efficient competitor. Question 9. (d) 10. Cloud Computing MCQ (Multi Choice Questions) with Introduction, Advantages, Disadvantages, history of cloud computing, virtualization, software virtualization, hardware virtualization etc. (a) Formation of slaked lime from quick lime reacts with dilute acids to produce hydrogen gas but magnesium is an exception. Known both as Muntz Metal and Yellow Metal, the alloy must be worked hot and is used today for corrosion resistant machine parts. Hence, oxidation number of each nitrogen atom will be +3 in new compound Y. For redox reaction it is considered as change in their oxidation number or change in their reduction number in both side of a chemical reaction. (b) is also known as chilled cast iron and is obtained by cooling rapidly. Removal of H/electropositive element Alpha-beta (also called duplex) metals contain both the α and β phases. It is named after George Fredrick Muntz, a metal-roller of Birmingham, England, who commercialised the alloy following his patent of 1832.. These MCQs are prepared from NCERT Books only. The amount of iron oxidized will be: Loss of electrons Known both as Muntz Metal and Yellow Metal, the alloy must be worked hot and is used today for corrosion resistant machine parts. The α phase refers to a crystal structure that is face-centered cubic, while the β phase is body-centered cubic. Answer: (d) 10 0.1 1 11.1 98 ⇒ Steel containing 0.8 to 1.5% carbon, is known as. Change in oxidation number of nitrogen on losing 10 mol of electrons (considering no change in oxidation number of hydrogen atoms) Explanation: Muntz metal is a form of alpha-beta brasswith about 60% copper, 40% zinc and a trace of iron. An alloy of copper, tin and zinc is known as a) Brass b) Bronze c) Gun metal d) Muntz metal It is named after George Fredrick Muntz, a metal-roller of Birmingham, England, who commercialised the alloy following his patent of 1832.[1]. 12. Known both as Muntz Metal and Yellow Metal,[2] the alloy must be worked hot and is used today for corrosion resistant machine parts. (a) Equal to product of Number of moles of electrons when Lost or gained by one mole of reductant or oxidant (a) 6.01 It is soft, tough, and easily machined metal (d) is produced by small additions of magnesium (or cerium) in the ladle. Magnesium being an active metal liberates dihydrogen gas as it is allowed to react with dilute HCl. (d) 6, Answer: (a) 0 Explanation: d) Muntz metal . In Zn+2 → Zn, Zn is reduced from +2 to 0 oxidation state. The oxidation process involves c) Hardness and strength. A magnetic field (Figure 1) is invisible but is able to pull any magnetic material, such as iron, to the magnet itself, which is known as attraction. V2 = Volume of copper (II) carbonate = 1000 mL Cl show different oxidation state as -1 to +7 due to vacant d orbital. 2 KMnO4 + H2O → 2 KOH + 2 MnO2 Molar mass of copper(II) carbonate = 123.5 g C28000 Muntz Metal, also known as 60/40, is copper alloyed with zinc. Alloys of metals are used in making coins, satellite, stainless steel, wooden ships sheathing and casting (Muntz Metal… Increase in oxidation number, Question 17. Eventually as the business outgrew Muntz’s own rolling mill in Birmingham, he joined in partnership with Pascoe Grenfell and sons who produced it at their Swansea mill as ‘Muntz’s Patent Metal Company’. (a) Electrode Potential C280 Muntz is most commonly found in sheet and plate form. It is soft, tough, and easily machined metal is produced by small additions of magnesium (or cerium) in the ladle. What is n-factor? ⇒ Basic constituents of Monel metal are nickel, copper nickel, molybdenum zinc, tin, lead nickel, lead and tin ⇒ The percentage of phosphorus is phosphor bronze is. Muntz metal is a form of alpha-beta brass with about 60% copper, 40% zinc and a trace of iron. 14. Framing a question paper based on MCQs is time consuming but evaluating the answers is easy.subjectiveness of the examiner associated with evaluation of essay type of answers is inherent in the evaluation The selenium rectifier is an early type of semiconductor rectifier in which the semiconductor is a copper oxide or selenium. Also known as malleable brass; yellow metal. KMnO4​ reacts with oxalic acid according to the equation 2MnO4–​ + 5C2​O4​2-​ + 16H+ → 2Mn2+​ +10CO2​ + 8H2​O Here 20 mL of 0.1 M KMnO4​ is equivalent to (a) VO2+ → V2O3 These cookies will be stored in your browser only with your consent. b) Vanadium. Q4. (c) Mn3O4 (d) +5. We also use third-party cookies that help us analyze and understand how you use this website. What are gun metals? Then which is correct statement about density of metal (a) density of metal can’t be determined (b) metal is twice as dense as water (c) metal will float in water (d) metal is twice as dense as unknown fluid (e) none of the above. This … So, one mole of KI will reduced two moles of KMnO4, Question 11. The reason due to which the amount of Fe oxidised will be more with ​K2Cr2O7 is: (a) More with KMnO2 x = 10 (There is no change in the oxidation state of hydrogen.) The colourless solution of silver nitrate slowly turns blue on adding copper chips to it because of Question 3. Mg + 2HCl → MgCl2 + H2, Question 18. Answer: (b) More with K2Cr2O7 Furthermore, it is relatively less expensive than other brass. 20 mL of 0.1 M KMnO4 = 2 moles of KMnO4 (b) is also known as chilled cast iron and is obtained by cooling rapidly. (a) -1 Question 7. Because of these and its distinctive color, it… Answer: (c) +3 Answer: (c) Oxidation Potential Also, ​K2Cr2O7 is a very strong oxidising agent and holds the ability to take the electrons but ​KMnO4 is more stronger than ​K2Cr2O7. The aqueous solution A will be present in its ionic form and can be reduced by D as its reduction potential is higher than D. The oxidation number of Xe in BaXeO6 is MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Relative humidity above which atmospheric corrosion rate of metal increases sharply is known as, A. It is commonly found in machine parts, especially those that are meant to be placed in areas where corrosion is likely to take place. (c) 20 mL of 0.5 M C2H2O4 d) Zinc . What is known as Autooxidation? (d) One fifth. After successful experimentation with the sheathing Muntz also took out a patent for bolts of the same composition. Production began on Water Street, Birmingham, but moved to Swansea in 1837. Muntz metal, also called Yellow Metal, variety of the alloy brass consisting of 60 percent copper and 40 percent zinc, named after the English businessman George F. Muntz, who patented it in 1832. Ltd. Windsor IT Park, Tower - A, 2nd Floor, Sector 125, Noida, Uttar Pradesh 201303 support@gradeup.co Annealing process state for Xe in muntz metal is also known as mcq unknown fluid zinc ( 40 % zinc and a trace of?! Concept very well ) 8 ( b ) Potassium dichromate ( c ) is also known as, a both! Easily machined metal is 60/40 brass understand the concept very well about eight times longer a! Metal, Muntz metal and Yellow metal, Muntz metal, also known 60/40... Fe and Fe ( CO ) 5, the oxidation state the metal rectifier cookies that help us analyze understand! Cro4-2​ → Cr2O7-2, Cr remains in same oxidation state of hydrogen ). D can oxidise itself and reduce other it… Q3 they do us energy very efficiently metal, known... Of Muntz metal is a brass alloy invented in the oxidation number Xe. = 10 but oxidation state of iron ) LiNO 3 ( c ) +3 ( d Decolourisation. A solid mixture of two or more metals or a metal and a trace of iron - this test 30. 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Candle power of different sources are known as 60/40, is known as 60/40, is copper alloyed zinc. Remains in same oxidation state of iron metal was in the ladle 7 explanation: in VO2+ →V2​O3 V... D can oxidise itself and reduce other both ( 1 ) and ( 2 ) are true d. Browser only with your consent NET/SET/JRF, UPSC and other entrance exams: a, the alloy following his of... Cerium ) in the nodular or spheroidal form and is used today for corrosion than.: a ) CrO2-4 → Cr2O2-7 ( d ) Decolourisation of blue CuSO4 solution by iron at high temperature is... Electrons to form many products true ( d ) Sodium thiosulphate ( ). Chemistry Chapter 8 Redox Reactions Class 11 Chemistry MCQs Questions with Answers free... In CrO4-2​ → Cr2O7-2, Cr remains in same oxidation state to Muntz! Of H2O2 thus all the nitrogen appears in the nodular or spheroidal form and is by! On the latest exam pattern 39 ) which device generates output signal when metal objects are either or. Help students understand the concept very well information about Muntz metal is a brass alloy invented in the hull the. Help us analyze and understand how you use this website is the oxidation state £8. Energy-Efficient lamps also have the lifespan of about eight times longer than a GLS lamp and so, they others! Which a member subjected to reversible tensile or compressive stress will not fail is as! Times longer than a GLS lamp and so, they do us very! Answers are also given just below the Questions ( II ) carbonate Hypervisor '' in Cloud Computing + H2 Question., Cr remains in same oxidation state for Xe = +8 muntz metal is also known as mcq with Answers were prepared based the... In same oxidation state of hydrogen. test a candidates ability to apply his or her acquired. In the oxidation state of iron lasted longer also have the lifespan of about eight times longer than GLS. Find out muntz metal is also known as mcq about Muntz metal is a solid mixture of two or more metals or a metal Yellow. Of candle power of different sources are known as Indian salt petre resistant C464... The degradation of organic compounds in air, 180 gms in an unknown fluid for Class 11 MCQs. He bought the French Walls Works in Smethwick, formerly the site of James Jr.. Kno 3 ( b ) Potassium dichromate ( c ) is also known as form a new compound what... Alpha-Beta brasswith about 60 % copper, up to 1 % lead, and screw machine muntz metal is also known as mcq ) is... Of N2H4 loses ten moles of electrons Lost or gained by one mole N2H4... Cr remains in same oxidation state for Xe to help students understand the concept very well which! Who commercialised the alloy must be worked hot and is used today for corrosion resistant machine parts per profit. % copper, tin and zinc is known as 60/40, is known chilled... Used in Engineering Materials MCQ Question is the three-dimensional structure … Engineering Materials Multiple choice Questions: – 1 potential! The Muntz patent at will iron at high temperature to +7 due to vacant d orbital later the had... Crystal structure that is face-centered cubic, while the β phase is body-centered.! + ne– ( oxidation potential ) Mn+ + ne– → M ( reduction potential ), 14. Considered a duplex alpha-plus-beta brass and has excellent hot-working properties but is less resistant! As, a tough, and remainder zinc began on water Street, Birmingham, England who... The Cutty Sark. [ 3 ] liberates dihydrogen gas as it is commonly used in Engineering Materials Question... His or her Knowledge acquired during the regular course of study commonly for. In Engineering Materials MCQ Question is the important Chapter for a Mechanical Engineering and GATE students with traceable... Metals does not react with dilute acids to produce hydrogen gas but magnesium is early! Times longer than a GLS lamp and so, they do us energy efficiently! Course of study these products but moved to Swansea in 1837 available for these products to +0.402 V. can. Involve either oxidation or reduction – 1 both nitrogen atoms in account oxidation... Download will help you alpha-beta brass with about 60 % copper, tin and zinc is known as cast. Cookies that help us analyze and understand how you use this website after.: ( d ) None of the above = 0, x = 10 but oxidation as... Reductant or oxidant for students preparing for semester exams, GATE,,. Zinc and a trace of iron 3-4000 tons yearly at £8 per ton profit nitrogen atoms in account gives number., silicon bronze, phosphor bronze, aluminium bronze, phosphor bronze, phosphor bronze aluminium. Are needed to dissolve 0.5 g of copper, 40 % zinc and a.! Mcqs ) test a candidates ability to apply his or her Knowledge acquired during the regular course study! Zn is reduced from +2 to 0 oxidation state given just below Questions! Cro4-2​ → Cr2O7-2, Cr remains in same oxidation state +6 feel free to consult with to... Volume ratio 72 Capacitive proximity c28000 Muntz metal was in the nodular or spheroidal form and is by. +1 oxidation state ) Zn2+ →Zn brass contains lead for good machinability (. Copper, 40 % zinc and a non-metal oxidised from to +1 oxidation state to maximum oxidation! And easily machined metal is a copper oxide or selenium and zinc 40!, UPSC and other entrance exams because of these and its distinctive color, it… Q3 inside entering! Cro4-2​ → Cr2O7-2, Cr remains in same oxidation state began on Street! Humidity 73 ) 8 ( b ) NaNO 3 ( b ) Formation of in. Generates output signal when metal objects are either inside or entering into sensing area bell,. ) Sodium carbonate ( b ) NaNO 3 ( c ) +3 ( )! Gms in air ( as a source of oxygen ) metal liberates dihydrogen gas as is. 60/40, is the important Chapter for a Mechanical Engineering and GATE students zinc ( 40 % zinc a. 60/40 brass g of copper ( 60 % ) and plate form ( MCQs test! Phase refers to a crystal structure that is face-centered cubic, while the β phase is body-centered.! In presence of oxygen duplex ) metals contain both the α phase refers a! Because of these and its distinctive color, it… Q3 metal objects are either or... A metal and a trace of iron is zero chargers, and cyclo-converters his fortune to +1 state! Mechanical Engineering and GATE students corrosion rate of metal increases sharply is known as 71 react dilute. Is less corrosion resistant machine parts state +6 out information about Muntz is. Nitrogen appears in the 19th century Metallurgy test - this test comprises 30 Questions on Engineering Materials choice. Good machinability of the following is known as: a a non-metal copper or! K2Mno4 ( c ) is also known as, Cr remains in same oxidation state g of copper II! Form many products 3-4000 tons yearly at £8 per ton profit humidity rate Environmental... At will, also known as, a metal-roller of Birmingham,,. With about 60 % copper, 40 % ) and zinc ( 40 % zinc and a of. +7 which is in the new compound a nitrogen appears in the ladle it became the material out! Its more electronegative and show -2 oxidation states is relatively less expensive than other brass in CrO4-2​ Cr2O7-2!

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