What is the duration of the Maharashtra HSC Chemistry board exam 2025?

The Maharashtra HSC chemistry board exam is held for 3 hours.

Which chapters are most important for 12th Boards Chemistry Maharashtra Board?

The important chapters and topics for the Maharashtra 12th chemistry board paper are: Aldehydes, Ketones, and Carboxylic Acids Halogen Derivatives of Alkanes and Arenes Alcohols, Phenols, and Ethers Coordination Compounds Thermodynamics Biomolecules

Maharashtra HSC Chemistry Answer Key 2025 Out, Check Set-wise Solutions, Exam Analysis -

Table of Contents

The Maharashtra State Board is holing the HSC board examination from February 11. In this process, the MSBSHSE is conducted the Maharashtra HSC Chemistry board exam on February 20, 2025. Students who took the exam can check the Maharashtra HSC Chemistry Answer Key 2025 for all question paper sets on this page along with the exam analysis.

Maharashtra HSC Chemistry Answer Key 2025

Our expert faculty for Chemistry at Adda247 prepares the unofficial solutions for all the board exam papers from Maharashtra Board. Students can review the Maharashtra HSC Chemistry Answer Key 2025 soon as the exam has been concluded. The questions are provided for all the objective-type questions and short-answer type questions. Students can use the answer key to assess their exam performance.

Q.No.	Question (QP Code: J-302)	Answers
1	Schottky defect is NOT observed in _____.	NiO
2	The freezing point of 0.1 m aqueous solution of Urea, if K f for water is 1.86 K kg mol -1 is _____.	-0.186 O C
3	Ozone layer is depleted by ____.	NO 2
4	When excess of AgNO 3 is added to a complex, one mole of AgCl is precipitated. The formula of complex is ____.	[CoCl 2 (NH 3 ) 3 ] Cl
5	The value of Δn g for the oxidation of 4 mole of sulphur dioxide to sulphur trioxide is ____.	-2
6	One dimensional nanostructure amongst the following is ____.	Nanorods
7	Which formula correlates degree of dissociation and concentration of electrolytes?	α = √Ka/c
8	The highest acidic compound among the following is ____.
9	The formula used to calculate molar conductivity of an electrolyte is _____.	Δ = 1000k/c
10	Which of the following is a secondary amine?	Diphenylamine
11	Write the structural formula of N,N-dimethylethanamine.

HSC Maharashtra Chemistry Questions and Answers Key 2025

The Maharashtra HSC chemistry answer key 2025 for short answer type questions and Section B questions have been provided below.

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:

8NH_3 + 3Cl_2 → 6NH_4Cl + N_2

(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)

Q. 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 (), the concentration of reactant reduces to half of its initial concentration, i.e., [A]=2[A]0

Substituting this in the rate equation:

Since, $log⁡2=0.3010\log 2 = 0.3010$ , we get:

Thus, the half-life (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,

where:

= concentration of the gas in the liquid,
= Henry’s law constant,
= partial pressure of the gas.

(b) Define: Osmotic pressure.

Answer: Osmotic pressure ( $π\pi$ ) 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:

where:

= molar concentration of solute,
= gas constant,
= temperature in Kelvin.

Q. 5. Differences between Lanthanoids and Actinoids:

Property	Lanthanoids	Actinoids
Atomic Numbers	57 to 71	89 to 103
Electronic Configuration	4f¹–14	5f¹–14
Oxidation States	+3 (common), rarely +2 or +4	Multiple oxidation states (+3 to +6)
Radioactivity	Mostly non-radioactive	All are radioactive
Chemical Reactivity	Less reactive	More reactive
Nature of Compounds	Form less complex compounds	Form highly complex compounds

Maharashtra Board HSC Chemistry Exam Answer Key 2025

The 2025 Maharashtra HSC Chemistry Exam Answer Key offers detailed solutions for each question featured in the Maharashtra Board Class 12 Chemistry examination. Learners can utilize this answer key to estimate their likely scores and evaluate their performance. The Maharashtra HSC Chemistry Answer Key 2025 PDF will be released for download soon after the exam, facilitating students in verifying their answers.

Maharashtra HSC Chemistry Exam Analysis 2025

Here are the students’ responses and expert analysis of the Maharashtra HSC Chemistry exam 2025 for students to gauge their performance. According to last year’s assessment, the chemistry exam had a moderate level of difficulty, where organic chemistry posed the greatest challenges, followed by physical chemistry and inorganic chemistry. In this document, the detailed section-wise and overall exam analysis for 2025 is presented.

HSC Maharashtra Chemistry Question Paper Analysis: Students’ Reaction

See what students who took the Maharashtra HSC Chemistry Examination 2025 are saying about the question paper below.

The majority of the questions were directly taken from the NCERT textbook. The majority of the questions were similar to those on last year’s exam paper.
The entire question paper was evenly structured.
Questions based on practical experience were simple.

Maharashtra HSC Chemistry Exam Analysis by Expert

The comprehensive Maharashtra Class 12 Chemistry Exam Analysis 2025 by expert can be found in the table below.

Maharashtra HSC Chemistry Exam 2025 Difficulty Level
Parameters	Details
Overall Difficulty Level	Easy to Moderate
Difficulty Level of Sections A	Easy
Difficulty Level of Sections B	Moderate
Difficulty Level of Sections C	Easy to Moderate
Difficulty Level of Sections D	Easy to Moderate
Number of Good Attempts	60+
Was the Paper Time Consuming?	Overall no. However, two sections: Section C and Section D were lengthy and time-consuming.

Maharashtra HSC Chemistry Question Paper 2025

The Maharashtra HSC chemistry board exam 2025 was held for 3 hours from 11 AM to 2 PM. The HSC Maharashtra board paper is conducted for 70 marks in total. The Maharashtra Board class 12 chemistry paper consists of different types of questions ranging from objective type to descriptive one. The Maharashtra HSC question paper 2025 will have a total of 31 questions.

Maharashtra Board Class 12th Chemistry Question Paper 2025 PDF

Students should stay tuned to this page to download the official Maharashtra HSC chemistry question paper 2025 pdf soon. The question paper pdf provided here can be used as a reference material to crosscheck answers given in the answer key.