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Test: Extraction of Metals - JEE MCQ
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15 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Extraction of Metals
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Test: Extraction of Metals - Question 1
The impurities associated with mineral used in metallurgy are called collectively?
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Test: Extraction of Metals - Question 2
Which of the ore dressing process requires finest size of ore?
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.
Test: Extraction of Metals - Question 4
Aluminothermic process is used for the extraction of metals, whose oxides are
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Test: Extraction of Metals - Question 6
Calamine, bauxite, malachite and siderite respectively are ores of .........
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Test: Extraction of Metals - Question 7
Which of the following elements is present as the impurity to the maximum extent in the pig iron?
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carbon and varying amounts of 
and 
which makes the iron hard and brittle.
Test: Extraction of Metals - Question 8
Which of the following statement(s) is/are correct?
(i) Cast iron is used in the manufacture of railway sleepers
(ii) Wrought iron is used in the manufacture of anchors, bolts, chains etc.
(iii) Nickel steel is used in making pendulums.
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is pyrolusite (oxide ore).
Test: Extraction of Metals - Question 11
Identify the correct set of sulphide ores from the following
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and 
. It is found in metamorphic, igneous, and sedimentary rocks.
.
.
Test: Extraction of Metals - Question 12
During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as
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, Ore of 
would be
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: Cinnabar
Test: Extraction of Metals - Question 14
Which one of the following oxides is reduced by water gas to obtain the metal during its extraction?
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Test: Extraction of Metals - Question 15
The pair of oxides, which can be leached out, when powdered bauxite containing certain impurities is digested with concentrated solution of 
at 
temperature and 
bar pressure are
Detailed Solution for Test: Extraction of Metals - Question 15
, the rest being a mixture of 
and 
. The powdered bauxite is treated with concentrated solution of 
resulting in the dissolution of 
and 
while the other oxides 
and 
) being basic remain insoluble in 
. Hence, only 
and 
leached out.|
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