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1
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The incorrect statement is :
A
bronze is an alloy of copper and tin
B
cast iron is used to manufacture wrought iron
C
german silver is an alloy of zinc, copper and nickel
D
brass is an alloy of copper and nickel
2
JEE Main 2020 (Online) 5th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
An Ellingham diagram provides information about :
A
the temperature dependence of the standard Gibbs energies of formation of some metal oxides
B
the pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction of metals
C
the conditions of pH and potential under which a species is thermodynamically stable
D
the kinetics of the reduction process
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Among statements (a) - (d), the correct ones are
(a) Lime stone is decomposed to CaO during the extraction of iron from its oxides.
(b) In the extraction of silver, silver is extracted as an anionic complex.
(c) Nickel is purified by Mond’s process.
(d) Zr and Ti are purified by Van Arkel method.
A
(a), (c) and (d) only
B
(c) and (d) only
C
(b), (c) and (d) only
D
(a), (b), (c) and (d)
4
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Cast iron is used for the manufacture of :
A
wrought iron, pig iron and steel
B
wrought iron and pig iron
C
wrought iron and steel
D
pig iron, scrap iron and steel
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