Metallurgy – JEE Main Previous Year Questions with Solutions


JEE Main Previous Year Papers Questions of Chemistry with Solutions are available at eSaral. Practicing JEE Main chapter wise questions of Chemistry will help the JEE aspirants in realising the question pattern as well as help in analysing weak & strong areas.   Simulator Previous Years AIEEE/JEE Main Question
Q. Which method of purification is represented by the following equation : $\mathrm{Ti}(\mathrm{s})+2 \mathrm{I}_{2}(\mathrm{g}) \stackrel{\mathrm{s} 23 \mathrm{K}}{\longrightarrow} \mathrm{TiI}_{4}(\mathrm{g}) \stackrel{1700 \mathrm{K}}{\longrightarrow} \mathrm{Ti}(\mathrm{s})+2 \mathrm{I}_{2}(\mathrm{g})$ (1) Van Arkel (2) Zone refining (3) Cupellation (4) Poling [AIEEE-2012]

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Sol. (1) Explanation Ti,Zr,Hg etc can be purified by Van Arkel’s process

Q. The substance used as froth stabilisers in froth-floatation process is : (1) Copper sulphate (2) Aniline (3) Sodium cyanide (4) Potassium ethyl xanthate [J-Mains-2012 (Online)]

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Sol. (2) Explanation Aniline is used to stablises the forth.

Q. Which of the oxide groups among the following cannot be reduced by carbon :- (1) $\mathrm{Fe}_{2} \mathrm{O}_{3}, \mathrm{ZnO}$ (2) $\mathrm{PbO}, \mathrm{Fe}_{2} \mathrm{O}_{4}$ (3) $\mathrm{Cu}_{2} \mathrm{O}, \mathrm{SnO}_{2}$ (4) $\mathrm{CaO}, \mathrm{K}_{2} \mathrm{O}$ [J-Mains-2012 (Online)]

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Sol. (4) Explanation More reactive metal such as K and “Ca” etc. can be used by electrolytic reduction method but not by carbon reduction method.

Q. In Goldschmidt alumino thermic process which of the following reducing agents is used : (1) Calcium (2) Coke (3) Sodium (4) Al-powder

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Sol. (4) In alumino thermic process ‘Al’ metal is used as reducing agent.

Q. Calcination is the process in which : (1) Ore is heated strongly below its melting point in the presence of excess of ait and is used for the conversion of carbonates and hydrated oxide ores to their respective oxides. (2) Ore is heated strongly below its melting point in the absence or limited supply of air and is used for conversion of sulphide ores to their respective oxides (3) Ore is heated strongly below its melting point either in the limited or absence of air and is used to convert carbonates and hydrated oxide ores to their respective oxides (4) Ore is heated strongly above its melting point in the limited supply of air to convert sulphide ores to their respective oxides. [JEE-MAINS 2014]

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Sol. (3) Calcination is carried out in absence of air.

Q. The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is : (1) Cu (2) Cr (3) Ag (4) Ca

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Sol. (4) Explanation “Ca” is more reactive metal, Which can be obtained by electrolysis of molten electrolyte of $\mathrm{CaCl}_{2}$.But not in aqueous solution.

Q. The form of iron obtained from blast furnace is : (1) Steel (2) Wrought Iron (3) Cast Iron (4) Pig iron [J-Mains-2014 (Online)]

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Sol. (4) Pig iron is obtained from blast furnace . Which is impurest form of iron.

Q. In the context of the Hall-Heroult process for the extreaction of Al, which of the following statements is false ? (1) $\mathrm{Al}^{3+}$ is reduced at the cathode to form Al (2) $\mathrm{Na}_{3}$ AlF_ $_{6}$ serves as the electrolyte (3) $\mathrm{CO}$ and $\mathrm{CO}_{2}$ are produced in this process (4) $\mathrm{Al}_{2} \mathrm{O}_{3}$ is mixed with $\mathrm{CaF}_{2}$ which lowers the melting point of the mixture and brings conductivity [JEE-MAINS-2015]

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Sol. (2) Explanation n the Hall-Heroult process ‘Al’ is reduced at cathode by electrolysis of molten electrolyte $\mathrm{Al}_{2} \mathrm{O}_{3}$ but not $\mathrm{Na}_{3} \mathrm{AlF}_{6}$

Q. When metal ‘M’ is treated with NaOH, a white gelatinous precipitate ‘X’ is obtained, which is soluble in excess of NaOH. Compound ‘X’ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ‘M’ is (1) Ca (2) Al (3) Fe (4) Zn [JEE-MAINS-2018]

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Sol. (2) Explanation

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Comments
  • February 23, 2021 at 10:44 pm

    Too simple and easy 🙂 questions ☺️☺️.

    1
  • February 16, 2021 at 8:39 pm

    Very easy questions

    2
  • September 26, 2020 at 9:48 am

    will u plss provide some trickky questions in large number

    13
  • September 25, 2020 at 12:38 pm

    Thank you so much for this …but can you put up more questions.

    3
  • September 11, 2020 at 2:23 pm

    Thank you sir
    As I request to you sir please provide us more questions

    2
  • September 10, 2020 at 4:04 pm

    good , but some more questions which gains knowledge and useful for competitive tests

    1
  • September 4, 2020 at 5:14 pm

    Nyc but some more questions

    1
  • September 1, 2020 at 1:59 pm

    For practice no of questions should be more

    4
  • August 31, 2020 at 12:55 pm

    Nice.. But some more questions sir please

    1
  • August 31, 2020 at 12:54 pm

    Nice.. But some more models

    0
  • August 31, 2020 at 7:58 am

    really helpful……but some more plz

    0
  • August 26, 2020 at 10:30 pm

    Rlly it is suprb nd vry hlp full…….

    0
  • August 26, 2020 at 3:08 pm

    Easy questions

    0
  • August 26, 2020 at 12:37 pm

    I need some extra questions sir
    Like recent 2019 and 2020 questions

    1
  • August 23, 2020 at 9:56 am

    Good, but i want some more questions
    Thank u very much sirr

    0
  • August 23, 2020 at 7:08 am

    I need some more Question.

    1
  • August 18, 2020 at 12:24 pm

    Thank you for your questions

    0
  • August 17, 2020 at 3:18 pm

    Tq for the above questions

    0
  • August 15, 2020 at 8:53 am

    Good…but some more questions

    0
  • August 12, 2020 at 8:34 pm

    need some tricky questions in large numbers.

    0
  • August 8, 2020 at 2:37 pm

    Some more questions required

    0
  • Sai
    July 17, 2020 at 9:00 am

    Good fornpractice

    0
  • July 15, 2020 at 11:56 pm

    Thank for question

    0
  • July 15, 2020 at 10:48 pm

    Good questions sir but we need some more they should be some what tricky

    0
  • June 30, 2020 at 3:17 pm

    easy questions try to give hard questions

    0
  • Sri
    June 18, 2020 at 11:00 pm

    Thank u sir, very much useful

    4
  • June 17, 2020 at 8:19 pm

    Not only upto 2018 need 2019 also sir if possible keep before year paper bits sir.Till 2018 bits helped me a lot kindly keep 2019 too

    0
  • June 16, 2020 at 12:51 pm

    Very good question sir it will be quick revision for us

    0
  • June 3, 2020 at 7:16 am

    new 2019 questions are absent see that

    0
  • May 19, 2020 at 8:00 am

    Very useful sir.thank you.need many questions also.

    0
  • May 19, 2020 at 7:59 am

    Very useful sir.thank you.

    0
  • May 9, 2020 at 8:36 pm

    Helpful before exams

    0
  • f
    May 9, 2020 at 11:46 am

    need many more questions . not sufficient number . and mention year was asked

    0
  • April 26, 2020 at 7:02 pm

    Nice question s

    0
  • April 26, 2020 at 4:19 pm

    Super one.

    0
  • April 8, 2020 at 11:26 am

    Less questions

    0
  • April 7, 2020 at 1:52 pm

    helpfull ,but not to a high level

    0
  • March 10, 2020 at 2:53 pm

    Good collection of important questions.

    0
  • Me
    January 8, 2020 at 1:09 pm

    Nice

    0
  • December 31, 2019 at 12:33 pm

    Helpful

    0