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Class 12 Chemistry (Part Ii) Chapter 8 D And F Block Elements Quiz 5 (25 MCQs)

Quiz Instructions

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1. General electronic configuration of d block elements

Correct Answer: B) Ns$^{1-2 }$(n-1)d$^{1-10}$.

2. What is the IUPAC name for the complex [Ag(NH3)2]+?

Correct Answer: D) Diammine silver(I).

3. What is the primary use of potassium permanganate?

Correct Answer: D) As an oxidizing agent.

4. How do lanthanides contribute to the production of strong magnets?

Correct Answer: C) Lanthanides contribute to strong magnets by being key components in neodymium-iron-boron (NdFeB) magnets.

5. Which of the following is a characteristic of lanthanoids?

Correct Answer: D) They are silvery white metals.

6. Both silver and cadmium have d$^{10}$ electronic configuration in ground state, although silver is transition element but cadmium is not considered as transition element because

Correct Answer: A) Silver is transition element but cadmium is not.

7. Transition elements show variable oxidation state due to

Correct Answer: A) Small energy gap between (n-1)d and ns orbitals.

8. Name a transition metal that is commonly used as a catalyst.

Correct Answer: B) Platinum.

9. In a chemistry class, Alisha is learning about transition metals and their importance in various industries. She is tasked with listing two industrial applications of transition metals.

Correct Answer: D) Catalysts in chemical reactions and manufacturing of alloys.

10. Which of the following is not a common property of the transition metals?

Correct Answer: C) They are easily vaporized.

11. Ion size of lanthanide is .....

Correct Answer: C) Decrease from La-Lu.

12. What factors influence the oxidation states of transition metals?

Correct Answer: A) Electron configuration, ligand nature, oxidation state, stability of complexes.

13. What are some common uses of lanthanides in technology?

Correct Answer: A) Common uses of lanthanides include strong magnets, phosphors in displays, catalysts, and rechargeable batteries.

14. Aanya is conducting an experiment in her chemistry lab to explore the effectiveness of different transition metals as catalysts. She needs to identify which of the following metals are commonly used in catalytic processes.

Correct Answer: C) Iron, Nickel, Palladium.

15. What role do ligands play in coordination chemistry?

Correct Answer: B) Ligands act as electron pair donors to central metal atoms in coordination complexes.

16. Which of the following is a correct term lanthanide elements can also be referred to as?

Correct Answer: B) Rare-earth metals.

17. Although +3 is the characteristics oxidation state for lanthanoids yet cerium also shows +4 oxidation state

Correct Answer: A) It has a tendency to attain noble gas configuration.

18. Which of the following is not an element of first transition series?

Correct Answer: C) Mg.

19. What is the effect of lanthanoid contraction?

Correct Answer: C) Decrease in atomic size.

20. Which of the following statement is incorrect regarding Zinc metal

Correct Answer: B) Zinc have high enthalpy of atomization.

21. The property which is not characteristic of transistion metals is

Correct Answer: D) Natural radioactivity.

22. A fe 2+ acts as a reducing agent R:Fe3+ has stable d5 configuration

Correct Answer: A) A true R true and correct reason.

23. What is the primary reason for the paramagnetic behavior of transition metals?

Correct Answer: A) Presence of unpaired electrons.

24. Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid state?

Correct Answer: B) CuF$_{2}$.

25. THE ELECTRONIC CONFIGURATION OF Cu(II) IS 3d9 AND Cu (I) IS 3d10 . wHICH OF THE FOLLOWING IS CORRECT?

Correct Answer: A) CU(II) IS MORE STABLE.

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