Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.In self-reduction, the reducing agentisa)Sb)O2-c)S2-d)SO2Correct answer is option 'C'. Can you explain this answer?

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Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO₄.5H₂O), atacamite (Cu₂CI(OH)₃), cuprite (Cu₂O), copper glance (Cu₂S) and malachite (Cu₂(OH)₂CO₃). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS₂). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.

In self-reduction, the reducing agent is

a)
S
b)
O^2-
c)
S^2-
d)
SO₂

Correct answer is option 'C'. Can you explain this answer?

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Copper is the most noble of the first row transition metals and occurs...

Cu₂S + 2Cu₂O → 6Cu + SO₂
lnCu₂S, sulphur is S^2- and in SO₂, sulphur is in +4 state.
Hence, S^2- is acting as reducing agent.

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Copper is the most noble of the first row transition metals and occurs...

Self-reduction in the extraction of copper from chalcopyrite:
In the extraction of copper from chalcopyrite, self-reduction is a crucial step that involves the following key points:
- Definition: Self-reduction is a process where a metal is extracted from its ore by heating the ore in the absence of air or any other oxidizing agent. The metal oxide present in the ore is reduced to the metal by its own constituent.
- Role of the reducing agent: In the case of extracting copper from chalcopyrite, the reducing agent is sulfur (S) present in the chalcopyrite ore. When the chalcopyrite ore is heated in the absence of air, sulfur reacts with oxygen atoms in copper oxide (Cu2O) to form sulfur dioxide (SO2) gas. This reaction leads to the reduction of copper oxide to copper metal.
- Chemical reaction: The self-reduction of copper oxide in chalcopyrite can be represented by the following chemical equation:
Cu2O + 2S → 2Cu + SO2
- Significance: Self-reduction is an important step in the extraction of copper from chalcopyrite as it helps in converting copper oxide to pure copper metal without the need for external reducing agents. This process is cost-effective and environmentally friendly compared to other extraction methods.
In conclusion, self-reduction plays a vital role in the extraction of copper from chalcopyrite by utilizing sulfur as a reducing agent to convert copper oxide to copper metal.

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Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.In self-reduction, the reducing species is

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Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.Iron is removed from chalcopyrite as

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Read the passage given below and answer the following questions:The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

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Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.In self-reduction, the reducing agentisa)Sb)O2-c)S2-d)SO2Correct answer is option 'C'. Can you explain this answer?

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Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.In self-reduction, the reducing agentisa)Sb)O2-c)S2-d)SO2Correct answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.In self-reduction, the reducing agentisa)Sb)O2-c)S2-d)SO2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2CI(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.Q.In self-reduction, the reducing agentisa)Sb)O2-c)S2-d)SO2Correct answer is option 'C'. Can you explain this answer?.

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