d- and f-Block Elements: JEE Main Chemistry Previous Year Questions

443 previous year questions from d- and f-Block Elements. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.Which of the following group of transition metals is called coinage metals?
2. 2.A transition metal ion exists in its highest oxidation state. It is expected to behave as
3. 3.Identify the incorrect statement from the following:
4. 4.The radius of La3+ (Atomic number of La = 57) is 1.06Å. Which one of the following given values will be closest to the radius of Lu3+ (Atomic number of Lu = 71) ?
5. 5.Which of the following factors may be regarded as the main cause of lanthanide contraction?
6. 6.A solution of $Cr{O}_5$ in amyl alcohol has a....colour
7. 7.In which one of the following pairs, both the elements does not have $\text{(}n-1\text{)}{d}^{10}n{s}^2$ configuration in its elementary state?
8. 8.Which one of the following is used to remove most of plutonium from spent nuclear fuel?
9. 9.Choose the correct statement. ${\text{Fe}}^{3+}$ ion is more stable than ${\text{Fe}}^{2+}$ ion because
10. 10.Which of the following elements are not regarded as transition elements?
11. 11.Which of the following exhibits only $+3$ oxidation state?
12. 12.A mixture of $\text{NaCl}$ and $K_2{\text{Cr}}_2{O}_7$ is heated with conc. $H_2{\text{SO}}_4$, deep red vapours are formed. Which of the following state…
13. 13.When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained are
14. 14.Identify the inorganic sulphides that are yellow in colour: (A) ${\left({\text{NH}}_4\right)}_{2}S$ (B) Pbs (C) Cus (D) ${\text{As}}_2{S}_3$ (E)…
15. 15.In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)
16. 16.A transition metal exists in its highest oxidation state. It is expected to behave as
17. 17.In a transition series, with the increase in atomic number, the paramagnetism
18. 18.Find the compound ' A' from the following reaction sequences. A…
19. 19.The pair of metal ions that can give a spin-only magnetic moment of 3.9 BM for the complex [M$(H_{2}O{)}_6$]$C{l}_2$ is :
20. 20.What are different possible oxidation states exhibited by scandium?
21. 21.Which one of the following is correct for all elements from Sc to Cu?
22. 22.The basic character of the transition metal monoxide follows the order: (At. no. : Ti = 22, V = 23, Cr = 24, Fe = 26)
23. 23.Identify the incorrect statement among the following:
24. 24.The pair of lanthanides in which both elements have high third-ionization energy is:
25. 25.Which one of the following lanthanide ions does not exhibit paramagnetism?