Which of the following is used in photography?
- $Ag_2S$
- $AgCl$
- $Ag _{2} C _{2} O _{4}$
- $AgBr$
The Correct Option is D
Solution and Explanation
Top Questions on d -and f -Block Elements
Complete the following ionic equations:
$5\text{SO}_3^{2-} + 2\text{MnO}_4^{-} + 6\text{H}^+ \longrightarrow$
- CBSE CLASS XII - 2025
- Chemistry
- d -and f -Block Elements
Answer the following questions:
Name two elements of 3d series for which the third ionisation enthalpies are quite high.
Out of KMnO$_4$ and K$_2$MnO$_4$, which one is paramagnetic and why?
Write any one consequence of lanthanoid contraction.
How do you prepare potassium manganate from pyrolusite ore?
Why is the ability of oxygen more than fluorine to stabilise higher oxidation states of transition metals?- CBSE CLASS XII - 2025
- Chemistry
- d -and f -Block Elements
- Account for the following :The $E^\circ_{\text{Mn}^{3+}/\text{Mn}^{2+}}$ value for manganese is highly negative, whereas $E^\circ_{\text{Mn}^{4+}/\text{Mn}^{3+}}$ is highly positive.
- CBSE CLASS XII - 2025
- Chemistry
- d -and f -Block Elements
- Assertion (A): Actinoids show irregularities in their electronic configurations.
Reason (R): Actinoids are radioactive in nature.- CBSE CLASS XII - 2025
- Chemistry
- d -and f -Block Elements
- Which of the following transition metal ion is not coloured?
- CBSE CLASS XII - 2025
- Chemistry
- d -and f -Block Elements
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Concepts Used:
D and F Block Elements
The d-block elements are placed in groups 3-12 and F-block elements with 4f and 5f orbital filled progressively. The general electronic configuration of d block elements and f- block elements are (n-1) d 1-10 ns 1-2 and (n-2) f 1-14 (n-1) d1 ns2 respectively. They are commonly known as transition elements because they exhibit multiple oxidation states because of the d-d transition which is possible by the availability of vacant d orbitals in these elements.
They have variable Oxidation States as well as are good catalysts because they provide a large surface area for the absorption of reaction. They show variable oxidation states to form intermediate with reactants easily. They are mostly lanthanoids and show lanthanoid contraction. Since differentiating electrons enter in an anti-penultimate f subshell. Therefore, these elements are also called inner transition elements.
Read More: The d and f block elements