ISC Class 12th Chemistry Answer Key 2025: The answer key for ISC Class 12 Chemistry exam 2025 will be released soon. This answer key will help students compare their answers and estimate their probable marks. Once the answer key is released, students can match their answers with the correct answers and evaluate their performance in the exam. This process helps students understand in which areas they need improvement and where they have performed well. Additionally, using the answer key allows students to learn from their mistakes and improve their preparation for future exams.
The Council for the Indian School Certificate Examinations (CISCE) conducted the ISC Class 12 Board Chemistry exam today i.e. on February 24 for a duration of three hours from 2:00 PM to 5:00 PM. As we know, the officials do not release the official answer key and declare the result directly.
However to help every candidate we have prepared an unofficial with all the answers This answer key will help students estimate their scores and analyze their performance. While it may not be 100% accurate, it will provide a good idea of the expected marks. Students can refer to it after the exam to check their answers. Stay tuned for the unofficial ISC Class 12 Board Chemistry exam answer key, which will be available soon after the exam is over
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Details |
Information |
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Conducting Body |
Council For the Indian School Certificate Examinations (CISCE) |
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Name of Examination |
ISC Class 12th Chemistry Board Exam 2025 |
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Category |
Answer Key |
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Status |
To be Released |
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ISC Class 12th Chemistry Exam Date 2025 |
February 24, 2025 |
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ISC Class 12th Chemistry Answer Key Release Date |
February 24, 2025 |
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Mode of Availability |
Online Mode |
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Official Website |
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Question Number |
Answer Key |
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(i) _____ is an example of a primary cell but _____ is an example of a secondary cell. |
Dry Cell, Nickel-cadmium cell |
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(ii) The complex compound [Ni(CO)₄] is ______ in shape and nickel is in ____ oxidation state in this complex compound. |
Tetrahedral, Zero |
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(iii) When acetaldehyde is treated with hydrazine and KOH in a high boiling solvent glycol, _____ is formed and the reaction is known as _____ reduction. |
Ethane, Wolff-Kishner |
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(iv) The transition metal ions having _____ d-orbitals are colourless and _____ in nature. |
Completely filled, Diamagnetic |
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Question Number |
Answer Key |
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(i) Which one of the following can produce the foul-smelling compound methyl isocyanide in presence of alcoholic KOH? |
(d) Chloroform and methyl amine |
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(ii) The osmotic pressure of a solution: Which one of the following is correct? |
(b) Only P and R are correct |
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(iii) Which one of the following alcohols is the strongest acid? |
(a) Phenol |
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(iv) Which one of the following does NOT form a silver mirror on heating with Tollen’s reagent? |
(c) Sucrose |
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(v) The coordination number and the oxidation state of the central metal ‘D’ in the complex [D(en)₂(H₂O)₂]Cl₃ are: |
(d) 6 and 3 respectively |
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(vi) Assertion & Reason: The process of halogenation of benzene takes place in the presence of anhydrous FeCl₃. |
(c) Assertion is true and Reason is false. |
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(vii) Assertion & Reason: The Zr-Hf pair of elements has the same value of atomic radii due to lanthanoid contraction. |
(a) Both Assertion and Reason are true and Reason is the correct explanation for Assertion. |
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Question Number |
Answer Key |
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(i) What will be the order of reaction if the unit of k is mol⁻² L² s⁻¹? |
Third Order |
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(ii) State any one difference between the order of reaction and molecularity of a reaction. |
The order of a reaction is determined experimentally and can be a fraction or zero, while molecularity is always a whole number. |
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(iii) For the reaction 2A → B + C, the rate law is rate = k[A]³/². What is the order and molecularity of the reaction? |
Mol = 2 |
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