CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day

CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day are discussed below. Students appearing for the CBSE 12th Board Exam 2025 can include these in their preparation.

Abhilasha Kiran

Updated on - Feb 7, 2025 | 10:32:00 AM

CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day are available below (Image Credits: pexels.com).

CBSE 12th Chemistry D and F Block Important Questions 2025: The Chemistry Exam for CBSE Class 12 Board 2025 is scheduled for February 27, 2025. With the CBSE Class 12th Chemistry Board Exams approaching, students must prioritize the D and F Block elements unit. The 12th Chemistry D and F Block chapter is part of inorganic Chemistry and holds the weightage of 7 marks in total. By including the CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day provided below, students can easily secure 7 marks in their Chemistry paper. The important questions from Chemistry D and F Block chapters highlight the crucial topics that can form questions in the CBSE Class 12th Chemistry Board Exam 2025.

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CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day

The D and F Block is the fourth unit of the CBSE 12th Chemistry syllabus. This crucial section demands a focus on key concepts like the electronic configuration, oxidation states, and lanthanoid contraction of lanthanoids and actinoids. The chapter also discusses the variable oxidation states, coloured compounds, catalytic properties, and magnetic properties of transition elements.

Additionally, Werner's theory of coordination compounds, their nomenclature, isomerism, and diverse applications are also part of the Chemistry D and F Block chapter. Candidates can include the following CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day.

Question Number	Questions
Ques 1	Explain briefly how the +2 state becomes more and more stable in the first half of the first-row transition elements with increasing atomic number.
Ques 2	Explain giving reasons: (i) Transition metals and many of their compounds show paramagnetic behaviour. (ii) The enthalpies of atomisation of the transition metals are high. (iii) The transition metals generally form coloured compounds. (iv) Transition metals and their many compounds act as good catalysts.
Ques 3	What are interstitial compounds? Why are such compounds well-known for transition metals?
Ques 4	Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.
Ques 5	How would you account for the following: (i) Of the d4 species, Cr2+ is strongly reducing while manganese(III) is strongly oxidising. (ii) Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised. (iii) The d1 configuration is very unstable in ions.
Ques 6	Indicate the steps in the preparation of: (i) K2Cr2O7 from chromite ore. (ii) KMnO4 from pyrolusite ore.
Ques 7	What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.
Ques 8	The chemistry of the actinoid elements is not as smooth as that of the lanthanoids. Justify this statement by giving some examples of the oxidation state of these elements.
Ques 9	Name the members of the lanthanoid series which exhibit +4 oxidation states and those which exhibit +2 oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.
Ques 10	What can be inferred from the magnetic moment values of the following complex species? Example: K4[Mn(CN)6) [Fe(H2O)6]2+ K2[MnCl4] Magnetic Moment (BM): 2.2 5.3 5.9

Including CBSE 12th Chemistry D and F Block Important Questions 2025 For Exam Day can be an effective strategy to prepare for the CBSE Class 12th Chemistry exam.

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