MSBSHSE Class 12th Chemistry Question Paper 2025 Maharashtra

Organisation : Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE)
Exam Name : HSC Exam March 2025
Class : Class 12th
Subject : Chemistry
Subject Code : 55
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Website : https://www.mahahsscboard.in/en/questionPaper

MSBSHSE Class 12th Chemistry Question Paper

Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE) HSC Exam March 2025 Class 12th Chemistry Question Paper.

MSBSHSE Class 12th Chemistry Questions

(1) The spin only magnetic moment of 3 Cr+ cation is _____.
(a) 3.742 BM
(b) 3.755 BM
(c) 3.873 BM
(d) 3.633 BM

(2) The pH of 0.001M HCl solution is _____.
(a) 10
(b) 3
(c) 2
(d) 11

(3) The correct structure of complex having IUPAC name sodium hexanitrocobaltate (III) is
(a) Na3 [Co(NO2)5]
(b) Na4 [Co(NO2)6]
(c) Na3 [Co(NO2)6]
(d) Na4 [Co(NO2)5

(4) The number of particles present in Face Centred Cubic Unit Cell is/are _____.
(a) 1
(b) 2
(c) 3
(d) 4

(5) The monomer used in preparation of teflon is _____.
(a) E caprolactum
(b) vinyl chloride
(c) styrene
(d) tetrafluoroethene

(6) The product of hydrolysis of propyne in the presence of 1% HgSO4 and 40% H2SO4 is _____.
(a) methanal
(b) ethanal
(c) propanal
(d) propanone

(7) If unit of rate constant is mol dm–3s–1, the order of reaction would be _____.
(a) zero
(b) 1
(c) 2
(d) 3

Answer the following questions :
(1) Write the name of metal nanoparticle used to remove E.coli bacteria from water.
(2) Write the name of reduction product formed when ethyl cyanide is treated with sodium and alcohol
(3) The compounds of Ti4+ ions are colourless due to ……
(4) Write SI unit of molar conductivity.
(5) Write the sign convention of work done during expansion of gas.
(6) Write the condition of reverse osmosis

Attempt any EIGHT of the following questions :
1. Derive an expression for maximum work obtainable during isothermal reversible expansion of an ideal gas from initial volume (V1) to final volume (V2).
2. What are interhalogen compounds? Write the chemical reaction, when chlorine reacts with dry slaked lime.
3. What is nano material? Write the reaction involved in sol-gel process during hydrolysis.
4. Write classification of proteins with an example.
5. Calculate the time required to deposit 2·4 g of Cu, when 2·03 A of current passed through CuSO4 solution. (At. mass of Cu = 63.5 g.mol–1)
6. Why amines are basic in nature? Among dimethylamine (pKb = 3·27) and diethylamine (pKb = 3·0), which one is more basic?
7. Explain buffer action of sodium acetate-acetic acid buffer.
8. Write preparation of (a) diethyl ether (b) ethyl cyanide from ethyl bromide.
9. Henry’s constant for CH3Br(g) is 0·159 mol dm–3.bar–1 at 25°C. Calculate its solubility in water at 25°C, if its partial pressure is 0·164 bar.
10. Write the structure and name of monomer of
(a) Nylon-6
(b) Natural rubber
11. Define Lanthanide contraction. Write the balanced chemical equations when acidified K2Cr2O7 reacts with H2S.
12. Derive the relationship between molar mass, density of the substance and unit cell edge length.

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