HSC Chemistry Exam 2025: The Maharashtra State Board of Secondary and Higher Secondary Education began the 2025 HSC board exams on 11th February 2025. The exams are being held in two shifts – the first from 11:00 AM to 2:00 PM for major subjects and the second from 3:00 PM to 6:00 PM. Today, the HSC Chemistry exam took place in the morning session and was conducted smoothly across all exam centres without any issues. Download the free question paper PDF along with the answer key here.
Maharashtra Board HSC Exam 2025 Overview
Take a look at some key highlights of the Maharashtra Board HSC Exam 2025 to stay updated. For a detailed overview of today’s HSC Chemistry exam (2024-25), read this article. You can also download the question paper PDF and answer key here from the links given below:
| Particulars | Details |
| Board Name | Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE) |
| Exam Name | Maharashtra HSC (Class 12) Board Exam 2025 |
| Exam Level | State-Level |
| Streams | Science, Commerce, Arts, Vocational |
| Exam Mode | Offline (Pen and Paper) |
| Exam Dates | February 11–March 11, 2025 |
| Official Website | mahahsscboard.in |
| Result Declaration | May 2025 (Tentative) |
| Passing Criteria | Minimum 35% in each subject |
Maharashtra Board HSC Chemistry Question Paper 2025
Before checking the question paper make sure that the latest paper should have the below mentioned structure section-wise. There should be four sections from A to D with a total 23 questions with internal choices. Check the complete structure here.
| Section | Question Type | Question Numbers | Marks per Question | Total Marks |
| Section A | MCQ | Q.1 (i) to (vii) | 1 | 7 |
| Very Short Answer (VSA) | Q.2 (i) to (vii) | 1 | 7 | |
| Section B | Short Answer - I (SA-I) (Attempt 8) | Q.3 to Q.13 | 2 | 16 |
| Section C | Short Answer - II (SA-II) (Attempt 4) | Q.14 to Q.19 | 3 | 12 |
| Section D | Long Answer (LA) (Attempt 2) | Q.20 to Q.23 | 4 | 8 |
The question paper PDF for Maharashtra Board Class 12 Chemistry is updated here for free download:
Also Check: NCERT Solutions for Class 12 (2024-2025) All Subjects & Chapters, PDF Download
Check previous year question papers:
Maharashtra Board HSC Chemistry Answer Key 2025
Check here the updated answer key for Maharshtra Board Class 12th HSC Chemistry solutions from the 2025 question paper. Evaluate your answers and know what score you might get:
SECTION - AQ.1 Select and write the correct answer for the following multiple-choice type questions: (i) Schottky defect is NOT observed in: (ii) The freezing point of 0.1m aqueous solution of urea, if KfK_fKf for water is 1.86 K kg mol−1^{-1}−1 is: (iii) Ozone layer is depleted by: (iv) When excess of AgNO₃ is added to a complex, one mole of AgCl is precipitated. The formula of the complex is: (v) The value of Δng\Delta n_gΔng for the oxidation of 4 moles of sulphur dioxide to sulphur trioxide is: (vi) One-dimensional nanostructure amongst the following is: Answer: (b) Nanotubes ✅ (vii) Which formula co-relates degree of dissociation and concentration of electrolyte Answer: (d) α = √(Ka/c) ✅ (viii) The highest acidic compound among the following is Answer: (ix) The formula used to calculate molar conductivity of an electrolyte is: Answer: (c) 1000Λ / k ✅ (x) Which of the following is a secondary amine? Answer: (c) Diphenylamine ✅ Q2. (i) Write the structural formula of N, N-dimethylethanamine. Answer: CH3-N(CH3)-CH3 (Tertiary Amine) (ii) Write the reagents used for the reduction of carbonyl group in Clemmensen’s reduction. Answer: Zn-Hg and HCl (iii) Write the IUPAC name of isoprene. Answer: 2-Methyl-1,3-butadiene (iv) The rate law equation for A → Product is rate = k[A]ˣ. What is the effect of an increase in the concentration of ‘A’ on the rate of reaction, if x < 0? Answer: Decrease in concentration of ‘A’ increases the rate (v) What is the molality of an aqueous solution of KBr having freezing point –3.72°C? (Kf for water is 1.86 K kg mol⁻¹) Answer: 2 mol/kg (vi) Write the balanced chemical equation, when excess of ammonia is treated with chlorine. Answer: 8NH3+3Cl2→6NH4Cl+N28NH_3 + 3Cl_2 → 6NH_4Cl + N_28NH3+3Cl2→6NH4Cl+N2 (vii) Write the number of donor atoms present in EDTA, during the formation of a complex. Answer: 6 donor atoms (4 Oxygen, 2 Nitrogen) (viii) Write the names of the metal elements in brass alloy. Answer: Copper (Cu) and Zinc (Zn) SECTION BQ. 3. Derivation of half-life and rate constant for a first-order reaction: The integrated rate equation for a first-order reaction is:
At half-life (t1/2), the concentration of reactant reduces to half of its initial concentration, i.e., [A]=2[A]0 Substituting this in the rate equation:
Since, log2=0.3010\log 2 = 0.3010log2=0.3010, we get: t1/2=0.693/k Thus, the half-life (t1/2)of a first-order reaction is independent of the initial concentration and depends only on the rate constant. Q. 4. (a) State Henry’s law. Answer: Henry’s law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid at a constant temperature. Mathematically, C=kHP where:
(b) Define: Osmotic pressure. Answer: Osmotic pressure (π\piπ) is the minimum pressure that must be applied to a solution to prevent the inward flow of solvent molecules through a semipermeable membrane. It is given by the equation: π=CRT where:
Q. 5. Differences between Lanthanoids and Actinoids:
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