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Which of following is general electronic configuration of Lanthanoides ?
The general electronic configuration of Lanthanoides is $ [Xe] 4f^{1-14} 5d^{0-1} 6s^2 $. This configuration covers the range of electrons that can be accommodated in the 4f, 5d, and 6s orbitals for Lanthanoides.
Basic properties of hydroxides of lanthanoides is
The hydroxides of lanthanides are more basic than $Al(OH)_3$ but less basic than $Ca(OH)_2$. This is because, as we move from left to right in the periodic table, the basicity of hydroxides decreases. Lanthanides are positioned between calcium and aluminum in terms of basicity.
Lanthanoides elements are separated on the basis of their
Lanthanoides are separated based on their difference in basicity. The difference in basicity arises due to the lanthanide contraction, where the atomic and ionic sizes of lanthanides decrease with increasing atomic number, affecting their chemical behavior.
$ Ln \rightarrow X $ What is x?
Lanthanoides generally form stable oxides with the formula $Ln_2O_3$. This is the most common oxide form for lanthanides, where 'Ln' represents any lanthanide element.
Which of following is used in gas lighters ?
Pyrophoric Misch metal is often used in gas lighters due to its ability to produce sparks when struck. This property makes it ideal for igniting gas.
Which of following is used as oxidizing agent in volumetric analysis ?
Ceric compounds, specifically ceric ammonium nitrate, are commonly used as oxidizing agents in volumetric analysis. They are utilized because of their ability to accept electrons and facilitate redox reactions.
What is the constitution of metals in pyrophoric misch metal ?
Pyrophoric misch metal is an alloy primarily composed of cerium (Ce) and lanthanum (La) with a smaller amount of iron (Fe) and other elements. The typical constitution is Ce-50%, La-40%, Fe-7%, and other elements making up the remaining 3%. This alloy is used in flints for lighters due to its ability to produce sparks when struck.
Which of following statement is wrong ?
Why do theoretical value of magnetic moment differ from their practical value ?
The theoretical value of the magnetic moment often differs from the practical value due to the rotation-orbital combination. This involves the interaction between the electron's spin and its orbital angular momentum, which can lead to deviations from the values predicted by simple spin-only calculations. These interactions are complex and can cause significant differences between theoretical and observed magnetic moments.
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