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Questions
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1
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
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)
2
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
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
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is :
A
Mercury
B
Carbon tetrachloride
C
Zinc sulphide
D
Silicon carbide
4
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Among the reactions (a) - (d), the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are :
(a) CaO + SiO2 $$ \to $$ CaSiO3
(b) 3Fe2O3 + CO $$ \to $$ 2Fe3O4 + CO2
(c) FeO + SiO2 $$ \to $$ FeSiO3
(d) FeO $$ \to $$ Fe + $${{1 \over 2}}$$O2
A
(a) and (d)
B
(c) and (d)
C
(a)
D
(d)
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