Organisation : Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE)
Exam Name : HSC Exam 2024
Class : Class 12th
Subject : Chemistry
Download : Question Paper
Website : https://mahahsscboard.in/mr/questionPaper
MSBSHSE Class 12th Chemistry Question Paper
Q. 1. Select and write the correct answer for the following multiple choice type of questions :
(1) The spin only magnetic moment of Cr3+ 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
Q. 2. Answer the following questions :
(i) Write the name of metal nanoparticle used to remove E.coli bacteria from water.
(ii) Write the name of reduction product formed when ethyl cyanide is treated with sodium and alcohol.
(vi) Write SI unit of molar conductivity.
(vii) Write the sign convention of work done during expansion of gas.
(viii) Write the condition of reverse osmosis
Attempt any EIGHT of the following questions :
Q. 3. Derive an expression for maximum work obtainable during isothermal reversible expansion of an ideal gas from initial volume(V1) to final volume (V2).
Q. 4. What are interhalogen compounds? Write the chemical reaction, when chlorine reacts with dry slaked lime.
Q. 5. What is nano material? Write the reaction involved in sol-gel process during hydrolysis.
Q. 6. Write classification of proteins with an example.
Q. 7. Explain buffer action of sodium acetate-acetic acid buffer.
Q. 8. Write preparation of (a) diethyl ether (b) ethyl cyanide from ethyl bromide
Q. 9. Write the structure and name of monomer of
(a) Nylon-6
(b) Natural rubber
Q. 10. Define Lanthanide contraction. Write the balanced chemical equations when acidified K2Cr2O7 reacts with H2S.
Q. 11. Derive the relationship between molar mass, density of the substance and unit cell edge length.
Attempt any EIGHT of the following questions :
Q. 13. What is osmotic pressure? How will you determine molar mass of solute from osmotic pressure?
Q. 14. Write chemical reactions involved in :
(a) Rosenmund reduction.
(b) Gatterman Koch formylation.
(c) Cannizzaro reaction of methanal.
Q. 15. Calculate the standard enthalpy of combustion of methane, if the standard enthalpy of formation of methane, carbon dioxide and water are –74·8, –393·5 and –285·8 kJmol–1 respectively.
Q. 16. What is the action of following on ethyl bromide ?
(a) silver nitrite
(b) Mg in dry ether
(c) alcoholic sodium hydroxide
Q. 17. For the reaction A + B P. If [B] is doubled at constant [A], the rate of reaction doubled. If [A] is triple and [B] is doubled, the rate of reaction increases by a factor of 6. Calculate the rate law equation
Q. 18. Arrange the following in the increasing order of the property mentioned:
(i) HOCl, HClO2, HClO3, HClO4 (acidic strength)
(ii) MF, MCl, MBr, MI (ionic character)
(iii) HF, HCl, HBr, HI (thermal stability)
Q. 19. Explain Wolf-Kishner reduction reaction. Write preparation of propanone by using ethanoyl chloride and dimethyl cadmium.
Q. 20. Write postulates of Werner theory of co-ordination complexes. Write the name of a hexadentate ligand.
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