Metallurgy · JEE Main previous year questions

2019 10 questions

1. Q682019 · 12 Apr 2019 · Shift 1
   
   1. A.only in the region a
   2. B.in the region a and c
   3. C.only in the region c
   4. D.in the region a and b
   Show answer

   Answer: B

2. Q882019 · 12 Apr 2019 · Shift 1

   The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are :

   1. A.washer woman and concentration
   2. B.fisher woman and concentration
   3. C.washer man and reduction
   4. D.fisher man and reduction
   Show answer

   Answer: A

3. Q882019 · 10 Apr 2019 · Shift 1

   Match the refining methods (Column I) with metals (Column II). | Column I (Refining Methods) | Column II (Metals) | |---|---| | (I) Liquation | (a) Zr | | (II) Zone Refining | (b) Ni | | (III) Mond Process | (c) Sn | | (IV) Van Arkel Method | (d) Ga |

   1. A.(I)-(c) ; (II)-(a) ; (III)-(b) ; (IV)-(d)
   2. B.(I)-(c) ; (II)-(d) ; (III)-(b) ; (IV)-(a)
   3. C.(I)-(b) ; (II)-(d) ; (III)-(a) ; (IV)-(c)
   4. D.(I)-(b) ; (II)-(c) ; (III)-(d) ; (IV)-(a)
   Show answer

   Answer: B

4. Q872019 · 9 Apr 2019 · Shift 1

   The ore that contains the metal in the form of fluoride is :

   1. A.sphalerite
   2. B.magnetite
   3. C.malachite
   4. D.cryolite
   Show answer

   Answer: D

5. Q822019 · 9 Apr 2019 · Shift 2

   The one that is not a carbonate ore is :

   1. A.siderite
   2. B.bauxite
   3. C.malachite
   4. D.calamine
   Show answer

   Answer: B

6. Q842019 · 9 Apr 2019 · Shift 2

   Assertion: For the extraction of iron, haematite ore is used. Reason: Haematite is a carbonate ore of iron.

   1. A.Both the assertion and reason are correct and the reason is the correct explanation for the assertion.
   2. B.Only the reason is correct.
   3. C.Both the assertion and reason are correct, but the reason is not the correct explanation for the assertion.
   4. D.Only the assertion is correct.
   Show answer

   Answer: D

7. Q892019 · 8 Apr 2019 · Shift 2

   The Mond process is used for the

   1. A.Extraction of Zn
   2. B.extraction of Mo
   3. C.Purification of Zr and Ti
   4. D.Purification of Ni
   Show answer

   Answer: D

8. Q882019 · 12 Jan 2019 · Shift 2

   The pair that does NOT require calcination is -

   1. A.$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3$ and $\mathrm{CaC}{\mathrm{O}}_3\cdot \mathrm{MgC}{\mathrm{O}}_3$
   2. B.$\mathrm{ZnC}{\mathrm{O}}_3$ and CaO
   3. C.ZnO and $\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3\cdot \mathrm{x}{\mathrm{H}}_2\mathrm{O}$
   4. D.ZnO and MgO
   Show answer

   Answer: D

9. Q842019 · 11 Jan 2019 · Shift 2

   The reaction that does NOT define calcination is :

   1. A.$2\mathrm{C}{\mathrm{u}}_2\mathrm{S}+3{\mathrm{O}}_2\stackrel{\Delta }{\to }2\mathrm{C}{\mathrm{u}}_2\mathrm{O}+2\mathrm{S}{\mathrm{O}}_2$
   2. B.$\mathrm{CaC}{\mathrm{O}}_3\cdot \mathrm{MgC}{\mathrm{O}}_3\stackrel{\Delta }{\to }\mathrm{CaO}+\mathrm{MgO}+2\mathrm{C}{\mathrm{O}}_2$
   3. C.$\mathrm{ZnC}{\mathrm{O}}_3\stackrel{\Delta }{\to }\mathrm{ZnO}+\mathrm{C}{\mathrm{O}}_2$
   4. D.$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3\cdot \mathrm{X}{\mathrm{H}}_2\mathrm{O}\stackrel{\Delta }{\to }\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3+\mathrm{X}{\mathrm{H}}_2\mathrm{O}$
   Show answer

   Answer: A

10. Q842019 · 9 Jan 2019 · Shift 1

    The ore that contains both iron and copper is :

    1. A.Copper Pyrites
    2. B.Malachite
    3. C.Dolomite
    4. D.Azurite
    Show answer

    Answer: A