Bihar Board 12th Chemistry Answer Key 2025, Download PDF - All SETs

Bihar Board Class 12th Chemistry Answer Key 2025: The answer key for the Class 12th Chemistry exam 2025, conducted by the Bihar School Examination Board (BSEB), will be released soon. This answer key will help students compare their answers and estimate their potential marks. Once the answer key is released, students can match their answers with the correct ones and evaluate their performance in the exam. This process helps students understand areas where they need improvement and where they performed well. Additionally, using the answer key allows students to learn from their mistakes and improve their preparation for future exams.

Also Check: Bihar Board 10th Exam Date 2025

Importance of Bihar Board Class 12th Chemistry Answer Key 2025:

• Self-Assessment: By using the answer key, students can match their answers with the correct ones. This helps them understand which questions they answered correctly and where they went wrong. It also allows students to identify their strengths and weaknesses, enabling them to prepare better for upcoming exams. Self-assessment helps students learn from their mistakes and work on improvement, boosting their confidence.
  
  
• Transparency: The answer key brings transparency to the exam process, as students can clearly see which answers were correct and which were not. This increases students' trust in the exam results, as they know the evaluation was done fairly and accurately. The answer key also shows students how correct answers should be presented, which can be helpful for future exams.
  

Check: BSEB Class 12 Chemistry Exam Analysis 2025

Bihar Board Class 12th Chemistry Answer Key 2025: Key Points

Related:

• BSEB Class 10 Model Papers 2025
• BSEB Class 12 Model Papers 2025

BSEB Class 12 Chemistry Answer Key 2025

1. Which of the following adsorptions forms multimolecular layer ?
(A) Physical adsorption
(B) Chemical adsorption
(C) Both (A) and (B)
(D) None of these

Ans: (A) Physical adsorption

2. Impurities present in an ore are called
(A) Flux
(B) Gangue
(C) Alloy
(D) Slag

Ans: (B) Gangue

3. The process of smelting involves reduction of metal oxide with
(A) Al
(B) C
(C) Mg
(D) S

Ans: (B) C

4. Lutetium (Lu) is
(A) a transition element
(B) a lanthanide
(C) an actinide
(D) a p-block element

Ans: (B) a lanthanide

5. Which of the following metals is not obtained by electrolysis ?
(A) Na
(B) Mg
(C) Al
(D) Fe

Ans: (D) Fe

6. Which of the following oxides is paramagnetic ?
(A) СО₂
(B) cIo
(C) SO2
(D) SiO

Ans: (A) CO₂

7. Elements of which atomic numbers belong to 3d transition series ?
(A)22 to 30
(B) 21 to 30
(C)21 to 31
(D) 21 to 29

Ans: (B) 21 to 30

How to Download Bihar Board Class 12th Chemistry Answer Key?

• Step 1: Visit the official website of Bihar Board, biharboardonline.bihar.gov.in.

• Step 2: Click on the "Answer Key" or "उत्तर कुंजी" section on the homepage.

• Step 3: Select the "Intermediate Chemistry Answer Key 2025" link.

• Step 4: Download the answer key in PDF format and compare it with your answers.

Also Check:

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• Bihar Board Class 12th 2025 Admit Card Out
• NCERT Books for CBSE Class 12 - Latest Edition
• NCERT Solutions for CBSE Class 12 - Updated
• NCERT Rationalised Content for Class 12
• NCERT Class 10 Revised Textbooks (All Subject PDFs)
• NCERT Class 10 Solution PDFs
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