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Page 1 P- 1 Numerical Q.1. Among following compounds, the number of those present in copper matte is ___________. Q.2. The number of statement/s, which are correct with respect to the compression of carbon d JEE Main 2023 (Online) 1st February Evening Shift ioxide from point (a) in the Andrews isotherm from the following is ___________ Page 2 P- 1 Numerical Q.1. Among following compounds, the number of those present in copper matte is ___________. Q.2. The number of statement/s, which are correct with respect to the compression of carbon d JEE Main 2023 (Online) 1st February Evening Shift ioxide from point (a) in the Andrews isotherm from the following is ___________ Answer Key & Explanation 1. Ans. Correct answer is 1 Explanation Copper matte is a mixture of copper sulfide and iron sulfide formed as a result of smelting of copper ore. It contains mainly copper sulfide (Cu2S) as the major component and iron sulfide (FeS) as a minor component. The compounds A. CuCO3, C. Cu2O, and D. FeO are not present in copper matte, but can be formed as a result of further processing or refining of the matte. Therefore, among the given compounds, only "B. Cu2S" is present in copper matte. 2. Ans. Correct answer is 2 Explanation A. Carbon dioxide remains as a gas upto point (b) B. Liquid carbon dioxide appears at point (c) JEE Main 2023 (Online) 24th January Evening Shift C. Liquid and gaseous carbon dioxide coexist between points (b) and (c) D. As the volume decreases from (b) and (c), the amount of liquid decreases Page 3 P- 1 Numerical Q.1. Among following compounds, the number of those present in copper matte is ___________. Q.2. The number of statement/s, which are correct with respect to the compression of carbon d JEE Main 2023 (Online) 1st February Evening Shift ioxide from point (a) in the Andrews isotherm from the following is ___________ Answer Key & Explanation 1. Ans. Correct answer is 1 Explanation Copper matte is a mixture of copper sulfide and iron sulfide formed as a result of smelting of copper ore. It contains mainly copper sulfide (Cu2S) as the major component and iron sulfide (FeS) as a minor component. The compounds A. CuCO3, C. Cu2O, and D. FeO are not present in copper matte, but can be formed as a result of further processing or refining of the matte. Therefore, among the given compounds, only "B. Cu2S" is present in copper matte. 2. Ans. Correct answer is 2 Explanation A. Carbon dioxide remains as a gas upto point (b) B. Liquid carbon dioxide appears at point (c) JEE Main 2023 (Online) 24th January Evening Shift C. Liquid and gaseous carbon dioxide coexist between points (b) and (c) D. As the volume decreases from (b) and (c), the amount of liquid decreases Between (b) & (c) ? liquid and gaseous CO2 co-exist. As volume changes from (b) to (c) gas decreases and liquid increases. (A), (C) ? correct Page 4 P- 1 Numerical Q.1. Among following compounds, the number of those present in copper matte is ___________. Q.2. The number of statement/s, which are correct with respect to the compression of carbon d JEE Main 2023 (Online) 1st February Evening Shift ioxide from point (a) in the Andrews isotherm from the following is ___________ Answer Key & Explanation 1. Ans. Correct answer is 1 Explanation Copper matte is a mixture of copper sulfide and iron sulfide formed as a result of smelting of copper ore. It contains mainly copper sulfide (Cu2S) as the major component and iron sulfide (FeS) as a minor component. The compounds A. CuCO3, C. Cu2O, and D. FeO are not present in copper matte, but can be formed as a result of further processing or refining of the matte. Therefore, among the given compounds, only "B. Cu2S" is present in copper matte. 2. Ans. Correct answer is 2 Explanation A. Carbon dioxide remains as a gas upto point (b) B. Liquid carbon dioxide appears at point (c) JEE Main 2023 (Online) 24th January Evening Shift C. Liquid and gaseous carbon dioxide coexist between points (b) and (c) D. As the volume decreases from (b) and (c), the amount of liquid decreases Between (b) & (c) ? liquid and gaseous CO2 co-exist. As volume changes from (b) to (c) gas decreases and liquid increases. (A), (C) ? correct MCQ (Single Correct Answer) Q.1. Which one of the following is not an example of calcination? JEE Main 2023 (Online) 15th April Morning Shift Q.2. Given below are two statements related to Ellingham diagram: Statement I : Ellingham diagrams can be constructed for formation of oxides, sulfides and halides of metals. Statement II : It consists of plots of ?fH0 vs T for formation of oxides of elements. In the light of the above statements, choose the most appropriate answer from the options given below: Page 5 P- 1 Numerical Q.1. Among following compounds, the number of those present in copper matte is ___________. Q.2. The number of statement/s, which are correct with respect to the compression of carbon d JEE Main 2023 (Online) 1st February Evening Shift ioxide from point (a) in the Andrews isotherm from the following is ___________ Answer Key & Explanation 1. Ans. Correct answer is 1 Explanation Copper matte is a mixture of copper sulfide and iron sulfide formed as a result of smelting of copper ore. It contains mainly copper sulfide (Cu2S) as the major component and iron sulfide (FeS) as a minor component. The compounds A. CuCO3, C. Cu2O, and D. FeO are not present in copper matte, but can be formed as a result of further processing or refining of the matte. Therefore, among the given compounds, only "B. Cu2S" is present in copper matte. 2. Ans. Correct answer is 2 Explanation A. Carbon dioxide remains as a gas upto point (b) B. Liquid carbon dioxide appears at point (c) JEE Main 2023 (Online) 24th January Evening Shift C. Liquid and gaseous carbon dioxide coexist between points (b) and (c) D. As the volume decreases from (b) and (c), the amount of liquid decreases Between (b) & (c) ? liquid and gaseous CO2 co-exist. As volume changes from (b) to (c) gas decreases and liquid increases. (A), (C) ? correct MCQ (Single Correct Answer) Q.1. Which one of the following is not an example of calcination? JEE Main 2023 (Online) 15th April Morning Shift Q.2. Given below are two statements related to Ellingham diagram: Statement I : Ellingham diagrams can be constructed for formation of oxides, sulfides and halides of metals. Statement II : It consists of plots of ?fH0 vs T for formation of oxides of elements. In the light of the above statements, choose the most appropriate answer from the options given below: JEE Main 2023 (Online) 13th April Evening Shift Q.3. Which one of the following is most likely a mismatch ? JEE Main 2023 (Online) 13th April Morning Shift Q.4. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : In the Ellingham diagram, a sharp change in slope of the line is observed for Mg?MgO at ~1120°C Reason R: There is a large change of entropy associated with the change of state In the light of the above statements, choose the correct answer from the options given belowRead More
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FAQs on General Principles and Processes of Isolation of Meta: JEE Mains Previous Year Questions (2021-2024) - Chemistry for JEE Main & Advanced
| 1. What are the general principles of isolation of metals? |  |
Ans. The general principles of isolation of metals include mining, concentration of ore, extraction of metal, and refining of metal.
| 2. What is the process of roasting in metallurgy? | |
Ans. Roasting is a process in metallurgy where the ore is heated in the presence of excess air to convert the ore into its oxide.
| 3. How is leaching used in the extraction of metals? | |
Ans. Leaching is a process used in the extraction of metals where a suitable solvent is used to extract the metal from the ore.
| 4. What is the role of flux in the extraction of metals? | |
Ans. Flux is used in the extraction of metals to remove impurities by forming a fusible slag and to lower the melting point of the metal oxide.
| 5. How is electrolytic refining used in the purification of metals? | |
Ans. Electrolytic refining is a process used to purify metals where an electrolytic cell is used to dissolve impure metal at the anode and deposit pure metal at the cathode.
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