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Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced


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9 Questions MCQ Test Chemistry for JEE | Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced

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Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 1

Copper can be extracted from (1978)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 1

Malachite is CuCO3 . Cu (OH)2 it is ore of copper.

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 2

In the alumino-thermite process, aluminium acts as                   (1983 - 1 Mark)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 2

Al reduces Fe2O3 or Cr2O3 to respective metals and acts as a reducing agent.
Fe2O3 + 2Al → Al2O3 + 2Fe

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 3

The chemical composition of ‘slag’ formed during thesmelting process in the extraction of copper is (2001S)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 3

NOTE : During the extraction of copper, iron is present in the ore as impurity (FeS).
The ore together with a little coke and silica is smelted; FeS present as impurity in the ore is oxidized to iron oxide, which then reacts with silica to form fusible ferrous silicate which is removed as slag.

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 4

Which of the following process is used in the extractive metallurgy of magnesium?  (2002S)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 4

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 5

Which ore contains both iron and copper?           (2005S)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 5

Cuprite : Cu2O; Chalcocite : Cu2S; Chalcopyrite : CuFeS2;
Malachite: Cu(OH)2.CuCO3. We see that CuFeS2 contais both Cu and Fe.

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 6

Extraction of zinc from zinc blende is achieved by                      (2007)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 6

NOTE : Extraction of Zn from ZnS (Zinc blende) is achieved by roasting followed by reduction with carbon.
2ZnS + 3O2 → 2ZnO + 2SO2
ZnO + C → Zn + CO

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 7

Oxidation states of the metal in the minerals haematite andmagnetite, respectively, are                 (2011)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 7

(i) Haematite is Fe2O3 in which Fe is present in III oxidation state.
(ii) Magnetite (Fe4O3) is an equimolar mixture of FeO and Fe2O3.
Oxidation state of Fe in FeO is II.
Oxidation state of Fe in Fe2O3 is III.

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 8

In the cyanide extraction process of silver from argentiteore, the oxidising and reducing agents used are              (2012)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 8

The reactions involved in cyanide extraction process are :

Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 9

Sulfide ores are common for the metals (JEE Adv. 2013)

Detailed Solution for Test: Single Correct MCQs: General Principles & Processes of Isolation of Elements | JEE Advanced - Question 9

Silver, copper and lead are commonly found in earth's crust as Ag2S (silver glance), CuFeS2 (copper pyrites) and PbS (galena)

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