Ellingham diagram mcq B. Which of the following best describes an Ellingham diagram? A) A plot of entropy change ( ) versus temperature B) A plot of enthalpy change ( ) versus temperature C) A plot of Gibbs free energy change ( ) versus temperature Ellingham diagram represents a graph of Direction : This section contains 5 multiple choice questions. (MCQ (Single Correct Answer)) 14. . 3. Latimer diagrams are also called oxidation diagrams correct incorrect The data from the Latimer diagrams cannot be used when calculating the standard potentials of redox reactions. (This question should be completed with the help of the interactive Ellingham diagram included with this TLP). In the light of the above statements, choose the correct answer from the options given below 氧化物自由能圖，又稱埃林漢姆圖(英語： Ellingham diagram)，是一種在熱力學中用於說明物質穩定性對溫度的依賴性的圖表。這種分析通常被用於評估還原金屬氧化物和硫化物的難易程度。 (a) Ellingham diagram is used to predict thermodynamic feasibility of reduction of oxides of one metal by another metal. The Test: Ellingham's Diagram & Its Applications: Thermodynamic Principles of Metallurgy (Old NCERT) MCQs are made for JEE 2025 Exam. In the Ellingham diagram, for the formation of magnesia (magnesium oxide) occupy lower position than aluminium oxide. Any metal can reduce the oxides of other metals that are located above it in the Ellingham diagram. Explain, using the Ellingham diagram, how a mixture of Cl 2 /O 2 gas may be used to separate Zn from Fe in a galvanised scrap. Hence option (2) is the answer. Ellingham Diagram does not give any information regarding the kinetics of the reduction process. It indicates that these oxides are unstable at moderate temperatures and will decompose on heating even in the absence of a reducing agent. The Test: Ellingham's Diagram & Its Applications: Thermodynamic Principles of Metallurgy (Old NCERT) questions and answers have been prepared according to the JEE exam syllabus. All of the above. On the Ellingham diagram, the free energy of formation for iron oxide is always lower than the free energy of formation of iron chloride. Ellingham Diagram Recommended MCQs - 72 Questions General Principles and Processes of Isolation of Elements (OLD NCERT) Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Sep 25, 2023 · Ellingham diagram normally consists of plots of ∆ f GV vs T for the formation of oxides of common metals and reducing agents i. 15. 2. 1. Solution: Ellingham diagrams helps to predict the feasibility of thermal reduction of an ore. There is an abrupt change in the slope of the Ellingham line when a change in phase (s→l) or (l→g) takes place. Ellingham Diagram Recommended MCQs - 72 Questions General Principles and Processes of Isolation of Elements Chemistry - XII Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Ellingham Diagram Recommended MCQs - 72 Questions General Principles and Processes of Isolation of Elements (OLD NCERT) Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Assertion A : In the Ellingham diagram, a sharp change in slope of the line is observed for $$\mathrm{Mg} \rightarrow \mathrm{MgO}$$ at $$\sim 1120^{\circ} \mathrm{C}$$ Reason R: There is a large change of entropy associated with the change of state. , for the reaction given below. Sep 29, 2024 · Ellingham diagram for the formation of Ag 2(g) O and HgO is at upper part of the diagram and their decomposition temperatures are 600 and 700 K respectively. a) True b) False Answer: a Clarification: Ellingham diagrams are based on thermodynamic concepts, therefore, these diagrams simply suggest whether the reduction of a given metal oxide with a particular reducing agent is possible or not. Hence, iron will always react to form its oxide in a Cl 2 /O 2 gas mixture. Find important definitions Here are some multiple-choice questions (MCQs) on the topic of Ellingham diagrams: 1. e. With respect to ore, Ellingham diagram helps to predict the feasibility of its (1) zone refining (2) thermal reduction (3) electrolysis (4) vapour phase refining. 4. A general reaction expressing oxidation is given by: 2xM(s) + O 2 (g) → 2M x O(s) On the basis of Ellingham diagram, which of the following is not correct? A. In this reaction, gas is consumed in the formation of oxide hence, molecular randomness decreases in the formation of oxide which leads to a negative value of ∆S as a result sign of T∆S term becomes positive. Ellingham diagram for Reduction of Oxides: Ellingham diagram is a plot between Δ f G o and T for the formation of oxides of metals. This set of Class 12 Chemistry Chapter 6 Multiple Choice Questions & Answers (MCQs) focuses on “Thermodynamic Principles of Metallurgy”. Answer. Each question has four choices (a), (b), (c) and (d), out Sep 18, 2023 · Ellingham diagram normally consists of plots of ∆ f GV vs T for the formation of oxides of common metals and reducing agents i. May 26, 2024 · 1. During the formation of metal oxide \(\Delta S\) becomes negative and \(\Delta G\) becomes positive resulting in a positive slope. a) True b) False View Answer Nov 26, 2020 · (This question should be completed with the help of the interactive Ellingham diagram included with this TLP). correct incorrect Latimer diagram contains different chemical species of an element with the most highly oxidized species on the left and the most reduced species of The rate of reaction cannot be understood from the Ellingham diagram. Entropy change for all metal oxides is roughly same. mnmzigmewskdhxsarusvawvyhtwvxtrhjtroejiruepgxiyihgqugxiwaevwmiuospqfrustrdmvawnw
Ellingham diagram mcq B. Which of the following best describes an Ellingham diagram? A) A plot of entropy change ( ) versus temperature B) A plot of enthalpy change ( ) versus temperature C) A plot of Gibbs free energy change ( ) versus temperature Ellingham diagram represents a graph of Direction : This section contains 5 multiple choice questions. (MCQ (Single Correct Answer)) 14. . 3. Latimer diagrams are also called oxidation diagrams correct incorrect The data from the Latimer diagrams cannot be used when calculating the standard potentials of redox reactions. (This question should be completed with the help of the interactive Ellingham diagram included with this TLP). In the light of the above statements, choose the correct answer from the options given below 氧化物自由能圖，又稱埃林漢姆圖(英語： Ellingham diagram)，是一種在熱力學中用於說明物質穩定性對溫度的依賴性的圖表。這種分析通常被用於評估還原金屬氧化物和硫化物的難易程度。 (a) Ellingham diagram is used to predict thermodynamic feasibility of reduction of oxides of one metal by another metal. The Test: Ellingham's Diagram & Its Applications: Thermodynamic Principles of Metallurgy (Old NCERT) MCQs are made for JEE 2025 Exam. In the Ellingham diagram, for the formation of magnesia (magnesium oxide) occupy lower position than aluminium oxide. Any metal can reduce the oxides of other metals that are located above it in the Ellingham diagram. Explain, using the Ellingham diagram, how a mixture of Cl 2 /O 2 gas may be used to separate Zn from Fe in a galvanised scrap. Hence option (2) is the answer. Ellingham Diagram does not give any information regarding the kinetics of the reduction process. It indicates that these oxides are unstable at moderate temperatures and will decompose on heating even in the absence of a reducing agent. The Test: Ellingham's Diagram & Its Applications: Thermodynamic Principles of Metallurgy (Old NCERT) questions and answers have been prepared according to the JEE exam syllabus. All of the above. On the Ellingham diagram, the free energy of formation for iron oxide is always lower than the free energy of formation of iron chloride. Ellingham Diagram Recommended MCQs - 72 Questions General Principles and Processes of Isolation of Elements (OLD NCERT) Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Sep 25, 2023 · Ellingham diagram normally consists of plots of ∆ f GV vs T for the formation of oxides of common metals and reducing agents i. 15. 2. 1. Solution: Ellingham diagrams helps to predict the feasibility of thermal reduction of an ore. There is an abrupt change in the slope of the Ellingham line when a change in phase (s→l) or (l→g) takes place. Ellingham Diagram Recommended MCQs - 72 Questions General Principles and Processes of Isolation of Elements Chemistry - XII Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Ellingham Diagram Recommended MCQs - 72 Questions General Principles and Processes of Isolation of Elements (OLD NCERT) Chemistry Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Assertion A : In the Ellingham diagram, a sharp change in slope of the line is observed for $$\mathrm{Mg} \rightarrow \mathrm{MgO}$$ at $$\sim 1120^{\circ} \mathrm{C}$$ Reason R: There is a large change of entropy associated with the change of state. , for the reaction given below. Sep 29, 2024 · Ellingham diagram for the formation of Ag 2(g) O and HgO is at upper part of the diagram and their decomposition temperatures are 600 and 700 K respectively. a) True b) False Answer: a Clarification: Ellingham diagrams are based on thermodynamic concepts, therefore, these diagrams simply suggest whether the reduction of a given metal oxide with a particular reducing agent is possible or not. Hence, iron will always react to form its oxide in a Cl 2 /O 2 gas mixture. Find important definitions Here are some multiple-choice questions (MCQs) on the topic of Ellingham diagrams: 1. e. With respect to ore, Ellingham diagram helps to predict the feasibility of its (1) zone refining (2) thermal reduction (3) electrolysis (4) vapour phase refining. 4. A general reaction expressing oxidation is given by: 2xM(s) + O 2 (g) → 2M x O(s) On the basis of Ellingham diagram, which of the following is not correct? A. In this reaction, gas is consumed in the formation of oxide hence, molecular randomness decreases in the formation of oxide which leads to a negative value of ∆S as a result sign of T∆S term becomes positive. Ellingham diagram for Reduction of Oxides: Ellingham diagram is a plot between Δ f G o and T for the formation of oxides of metals. This set of Class 12 Chemistry Chapter 6 Multiple Choice Questions & Answers (MCQs) focuses on “Thermodynamic Principles of Metallurgy”. Answer. Each question has four choices (a), (b), (c) and (d), out Sep 18, 2023 · Ellingham diagram normally consists of plots of ∆ f GV vs T for the formation of oxides of common metals and reducing agents i. May 26, 2024 · 1. During the formation of metal oxide \(\Delta S\) becomes negative and \(\Delta G\) becomes positive resulting in a positive slope. a) True b) False View Answer Nov 26, 2020 · (This question should be completed with the help of the interactive Ellingham diagram included with this TLP). correct incorrect Latimer diagram contains different chemical species of an element with the most highly oxidized species on the left and the most reduced species of The rate of reaction cannot be understood from the Ellingham diagram. Entropy change for all metal oxides is roughly same. mnmz igme wskd hxsa rusv awvyht wvxtr hjtroej iruep gxiyi hgqugxiw aevwmiu ospq frustrd mvawnw