Podcast
Questions and Answers
What is the main reason for the lanthanides to have identical chemical properties?
What is the main reason for the lanthanides to have identical chemical properties?
- Similar physical properties
- Lanthanide contraction
- Identical electronic configuration (correct)
- Fajan's rule
According to Fajan's rule, what property affects the tendency of hydroxides to dissociate?
According to Fajan's rule, what property affects the tendency of hydroxides to dissociate?
- Atomic number
- Number of valence electrons
- Size of the cation (correct)
- Size of the anion
How does lanthanide contraction affect the basicity of lanthanides from La to Lu?
How does lanthanide contraction affect the basicity of lanthanides from La to Lu?
- No effect on basicity
- Increases basicity
- Causes instability
- Decreases basicity (correct)
What causes certain pairs of elements like Zr/Hf and Nb/Ta to have almost identical sizes and properties?
What causes certain pairs of elements like Zr/Hf and Nb/Ta to have almost identical sizes and properties?
Which process involves the dissolution of thorium and lanthanides as their sulphates?
Which process involves the dissolution of thorium and lanthanides as their sulphates?
What is the result of agitating the pasty mass of sulphates with water and filtering to remove silica?
What is the result of agitating the pasty mass of sulphates with water and filtering to remove silica?
Which lanthanides are precipitated as double sulphates when treated with Na2SO4?
Which lanthanides are precipitated as double sulphates when treated with Na2SO4?
What are the products formed when the precipitated double sulphates are treated with hot NaOH?
What are the products formed when the precipitated double sulphates are treated with hot NaOH?
Which lanthanide is precipitated as CeO2 when the oxides are treated with dilute HNO3?
Which lanthanide is precipitated as CeO2 when the oxides are treated with dilute HNO3?
What method is used to separate individual lanthanides from a solution containing nitrates of La, Pr, Nd, and Sm?
What method is used to separate individual lanthanides from a solution containing nitrates of La, Pr, Nd, and Sm?
What happens to the value of $\Delta G^{\circ}$ during a reaction as temperature increases in Ellingham diagrams?
What happens to the value of $\Delta G^{\circ}$ during a reaction as temperature increases in Ellingham diagrams?
In Ellingham diagrams, what does an abrupt change in the slope of a curve indicate?
In Ellingham diagrams, what does an abrupt change in the slope of a curve indicate?
How can Ellingham diagrams be used to predict the ability of a metal to reduce the oxide of another metal?
How can Ellingham diagrams be used to predict the ability of a metal to reduce the oxide of another metal?
At a given temperature, how can it be determined if a metal (A) can reduce the oxide of another metal (B) using an Ellingham diagram?
At a given temperature, how can it be determined if a metal (A) can reduce the oxide of another metal (B) using an Ellingham diagram?
What does it indicate if there is a point on each curve in an Ellingham diagram where the metal oxide is stable below it and unstable above it?
What does it indicate if there is a point on each curve in an Ellingham diagram where the metal oxide is stable below it and unstable above it?
Which metal has the highest tendency to reduce the oxides of other metals?
Which metal has the highest tendency to reduce the oxides of other metals?
What is a limitation of Ellingham diagrams?
What is a limitation of Ellingham diagrams?
What does the principle involved in choosing a reducing agent for metal oxides to metals consider?
What does the principle involved in choosing a reducing agent for metal oxides to metals consider?
What is the main property of ions present in solution in ion exchange chromatography?
What is the main property of ions present in solution in ion exchange chromatography?
What allows certain minerals like zeolites to exchange cations in solution?
What allows certain minerals like zeolites to exchange cations in solution?
