Maharashtra MSS Main Chemistry Paper I 2025
- Year 2025
- Conducted By Maharashtra Public Service Commission
- Questions 8
- Maximum Marks 250
- Duration Three Hours
- Languages English
Exam Details
| Detail | Information |
|---|---|
| Examination | Maharashtra State Services Main Examination |
| Year | 2025 |
| Conducting Body | Maharashtra Public Service Commission |
| Paper | Chemistry Paper I |
| Subject | Chemistry |
| Duration | Three Hours |
| Maximum Marks | 250 |
| Number of Questions | 8 |
| Question Type | Descriptive / Subjective |
This entry consolidates the Maharashtra State Services Main Examination Chemistry Paper I (2025). Page 1 provides the exam header, medium (English), total marks (250), duration (three hours), and instructions including the format (two sections, eight questions, five to attempt, with Q1 and Q5 compulsory) and calculator allowance. Page 2 presents the repaired objective/theory questions for Section A, including substantive prompts on ideal vs real gases, thermodynamics, entropy, phase diagrams, amperometric titrations, and Joule-Thomson effects. The combined pages outline the structure, scoring, and expectation for descriptive versus (limited) objective-type prompts, and lay a foundation for SEO-friendly metadata, topic tagging, and FAQ development.
Major Topics Covered
- Ideal gas
- Real gas deviations
- Surface tension
- Capillary rise
- Thermodynamics
- First law of thermodynamics
- Isothermal process
- Adiabatic process
- Cyclic processes
- Glass electrode
- Transition state theory
- Collision theory
- Entropy
- Reversible vs irreversible processes
- Amperometric titration
- Phase diagram of water
- Joule-Thomson effect
- Joule-Thomson coefficient
- Inversion temperature
- Cp (heat capacity at constant pressure)
Why This Paper is Important
- Useful for Maharashtra State Services Main Examinat preparation
- Helps understand the latest exam pattern
- Useful for practice and self-assessment
- Covers frequently asked General Studies topics
- Helpful for analysing question trends
Related Resources
Instructions
- न्नात्र्य सेग (प्रस्थ) परीक्षा- २०२५ - परीक्षा रिजोक ०२ मे, २०२६ 2025 122 BOOKLET NO. 136057 Chemistry Paper -1 Time Allowed: Three Hours Maximum Marks: 250 Medium: English Type of Paper : Conventional/Descriptive
- There are EIGHT questions divided in two Sections, out of which FIVE are to be attempted.
- Question No. 1 and 5 are compulsory.
- Out of the remaining, THREE are to be \bm{\divideontimes} SE. attempted choosing at least ONE question from each Section.
- The number of marks carried by a question/sub-question is indicated against it. З.
- The medium of answer should be mentioned on the answer book as claimed in the application
- and printed on admission card.
- The answers written in medium other than the authorized medium will not be assessed and no marks will be assigned to them.
- Wherever option has been given, only the required number of responses in the serial order attempted shall be assessed.
- Unless struck off, attempt of a question shall be counted even if attempted partly.
- Excess responses shall not be assessed and shall be ignored.
- Candidates are expected to answer all the sub-questions of a question together.
- If sub-question of a question is attempted elsewhere (after leaving a few page or after attempting another question) the later sub-question shall be overlooked.
- Keep in mind the word limit indicated in the question if any.
- Any page or portion of the page left blank in the Answer Booklet must be plearly struck off.
- Unless otherwise mentioned, symbol and notation have their usual standard meanings.
- Assume suitable data, if necessary and indicate the same clearly.
- Neat sketches may be drawn, wherever required.
- Note : Candidates will be allowed to use Scientific (Non-programmable type) calculators. P.T.O.
Questions (page 2)
Q0. 10 What are the causes of deviation? What are the effects of surface tension in daily life? Calculate the surface tension of toluene in which it rises 2 cm in capillary tube of radius 0.035 cm. The density of toluene at 20°C is 0.860 gm/cc (g = 9.8 ms^-2).
Q0. State first Law of Thermodynamics in three different forms. Write down its mathematical equation with their usual meanings.
Q0.
(a) Critically examine isothermal
(b) adiabatic and
(c) cyclic processes. Explain construction, working, advantages and disadvantages of glass electrode.
Q0. Discuss Transition state theory. Give its advantages over the Collision theory.
Q0. Define entropy. Explain how entropy changes take place in a reversible process and in an irreversible process.
Q0. What are the amperometric titrations? Explain the nature of curves obtained in amperometric titration. Give in short its advantages, disadvantages and applications and also explain when the dead stop end point method is applicable.
Q0. Draw a labelled phase diagram of Water system and discuss its salient features.
Q0. What is Joule-Thomson effect? Justify that during this process, enthalpy of the system remains constant. Also explain what you understand by Joule-Thomson coefficient and inversion temperature. Derive that Joule-Thomson coefficient is given by μ = -(1)/(CP) (δ H)/(δ P) )_T.
Q0. What is Joule-Thomson effect? Justify that during this process, enthalpy of the system remains constant. Also explain what you understand by Joule-Thomson coefficient and Inversion temperature. Derive that Joule-Thomson coefficient is given by μ = -(1)/(CP) (δ H)/(δ P) )_T.
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Frequently asked questions
What is the medium of the exam?
English.
How many questions are in the paper and how many must be attempted?
Eight questions in two sections; five are to be attempted. Question No. 1 and 5 are compulsory.
What is the duration of the paper?
Three hours.
What is the maximum marks for the paper?
250 marks.
Are calculators allowed?
Yes, scientific (non-programmable) calculators are allowed.
What is the paper code?
136057.