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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]
Ans. (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)]
Ans. (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)]
Ans. (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
Ans. (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]
Ans. (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
Ans. (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)]
Ans. (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]
Ans. (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]
Ans. (2) Explanation

Leave a comment


Ankit Singh
March 24, 2023, 6:35 a.m.
Thank you
Harshan S
Jan. 31, 2023, 6:22 p.m.
thank you
May 5, 2022, 5:53 p.m.
More Questions needed
Amit Singh kushwaha
June 22, 2021, 8:08 p.m.
Debarati Pramanick
March 14, 2021, 12:01 p.m.
Thank you
Feb. 23, 2021, 10:44 p.m.
Too simple and easy 🙂 questions ☺️☺️.
Feb. 16, 2021, 8:39 p.m.
Very easy questions
shilpa kommiri
Sept. 26, 2020, 9:48 a.m.
will u plss provide some trickky questions in large number
July 29, 2023, 6:35 a.m.
Use marks app
Sept. 25, 2020, 12:38 p.m.
Thank you so much for this ...but can you put up more questions.
Satyam Trivedi
Sept. 11, 2020, 2:23 p.m.
Thank you sir As I request to you sir please provide us more questions
Sept. 10, 2020, 4:04 p.m.
good , but some more questions which gains knowledge and useful for competitive tests
Sept. 4, 2020, 5:14 p.m.
Nyc but some more questions
Sept. 1, 2020, 1:59 p.m.
For practice no of questions should be more
Aug. 31, 2020, 12:55 p.m.
Nice.. But some more questions sir please
Aug. 31, 2020, 12:54 p.m.
Nice.. But some more models
Aug. 31, 2020, 7:58 a.m.
really helpful......but some more plz
Shivani Bitla
Aug. 26, 2020, 10:30 p.m.
Rlly it is suprb nd vry hlp full.......
Anand kumar
Aug. 26, 2020, 3:08 p.m.
Easy questions
Aug. 26, 2020, 12:37 p.m.
I need some extra questions sir Like recent 2019 and 2020 questions
Aug. 23, 2020, 9:56 a.m.
Good, but i want some more questions Thank u very much sirr
Aug. 23, 2020, 7:08 a.m.
I need some more Question.
Aug. 18, 2020, 12:24 p.m.
Thank you for your questions
Aug. 17, 2020, 3:18 p.m.
Tq for the above questions
Aug. 15, 2020, 8:53 a.m.
Good...but some more questions
Aug. 12, 2020, 8:34 p.m.
need some tricky questions in large numbers.
Aug. 8, 2020, 2:37 p.m.
Some more questions required
July 17, 2020, 9 a.m.
Good fornpractice
Kamani gupta
July 15, 2020, 11:56 p.m.
Thank for question
July 15, 2020, 10:48 p.m.
Good questions sir but we need some more they should be some what tricky
June 30, 2020, 3:17 p.m.
easy questions try to give hard questions
June 18, 2020, 11 p.m.
Thank u sir, very much useful
June 17, 2020, 8:19 p.m.
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
June 16, 2020, 12:51 p.m.
Very good question sir it will be quick revision for us
June 3, 2020, 7:16 a.m.
new 2019 questions are absent see that
May 19, 2020, 8 a.m.
Very useful sir.thank you.need many questions also.
May 19, 2020, 7:59 a.m.
Very useful sir.thank you.
Arpit Yadav
May 9, 2020, 8:36 p.m.
Helpful before exams
May 9, 2020, 11:46 a.m.
need many more questions . not sufficient number . and mention year was asked
April 26, 2020, 7:02 p.m.
Nice question s
Goldi verma
April 26, 2020, 4:19 p.m.
Super one.
April 8, 2020, 11:26 a.m.
Less questions
April 7, 2020, 1:52 p.m.
helpfull ,but not to a high level
March 10, 2020, 2:53 p.m.
Good collection of important questions.
Jan. 8, 2020, 1:09 p.m.
Dec. 31, 2019, 12:33 p.m.

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