HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2023-2024
Date & Time: 29th February 2024, 11:00 am
Duration: 3h
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General Instructions:
The question paper is divided into four Sections.
- Section A:
Q. No. 1 contains Ten multiple choice type of questions carrying One mark each. Only the first attempt will be considered for evaluation.
Q. No. 2 contains Eight very short answer type questions carrying One mark each. - Section B: Q. No. 3 to Q. No. 14 are Twelve short answer type questions carrying Two marks each. (Attempt any Eight)
- Section C: Q. No. 15 to Q. No. 26 are Twelve short answer type questions carrying Three marks each. (Attempt any Eight)
- Section D: Q. No. 27 to Q. No. 31 are Five long answer type questions carrying Four marks each. (Attempt any Three)
- Use of log table is allowed. Use of calculator is not allowed.
- Figures to the right indicate full marks.
- Given: R = 8.314 J.K-1.mol-1
NA= 6.022 x 1023
F = 96500C
. ade
The spin only magnetic moment of Cr3+ cation is ______.
3.742 BM
3.755 BM
3.873 BM
3.633 BM
Chapter: [0.08] Transition and Inner Transition Elements
The linkage present in Lactose is ______.
α, β - 1, 2 - glycosidic linkage
α - 1, 4 - glycosidic linkage
β - 1, 4 - glycosidic linkage
α - 1, 4 - glycosidic linkage
Chapter: [0.14] Biomolecules
The product of the following reaction is
\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{C2H5 - C - CH3 ->[H2/Ni][\Delta] \phantom{..}?}\end{array}\]
\[\ce{CH3 - CH2 - CH2 - CH2 - OH}\]
\[\begin{array}{cc}
\ce{CH3 - CH - CH2 - CH3}\\
|\phantom{.........}\\
\ce{OH}\phantom{.......}
\end{array}\]
\[\ce{CH3 - CH2 - CH2 - CH3}\]
\[\ce{CH3 - CH2 - CH2 - COOH}\]
Chapter: [12.01] Aldehydes and Ketones
The pH of 0.001 M HCl solution is ______.
1.0
2.0
3.0
7.0
10
11
Chapter: [0.03] Ionic Equilibria
The correct structure of complex having IUPAC name sodium hexanitrocobaltate (III) is ______.
\[\ce{Na3[Co(NO2)5]}\]
\[\ce{Na4[Co(NO2)6]}\]
\[\ce{Na3[Co(NO2)6]}\]
\[\ce{Na4[Co(NO2)5]}\]
Chapter: [0.09] Coordination Compounds
The number of particles present in Face Centred Cubic Unit cell is/are ______.
1
2
3
4
Chapter: [0.01] Solid State
The monomer used in preparation of teflon is ______.
E caprolactum
vinyl chloride
styrene
tetrafluoroethylene/tetrafluoroethene
Chapter: [0.15] Introduction to Polymer Chemistry [0.15] Polymers
Among the following vinylic halide is ______.
\[\begin{array}{cc}\ce{R - CH - R}\\|\phantom{..}\\\ce{X}\phantom{..}\end{array}\]
\[\ce{CH2 = CH - X}\]
\[\ce{CH2 = CH - CH2 - X}\]
Chapter: [0.1] Halogen Derivatives
The product of hydrolysis of propyne in the presence of 1% \[\ce{HgSO4}\] and 40% \[\ce{H2SO4}\] is ______.
methanal
ethanal
Propanal
propanone
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids
If unit of rate constant is mol dm−3s−1, the order of reaction would be ______.
zero
1
2
3
Chapter: [0.06] Chemical Kinetics
Write the name of metal nanoparticle used to remove E.coli bacteria from water.
Chapter: [0.16] Green Chemistry and Nanochemistry
Write the name of reduction product formed when ethyl cyanide is treated with sodium and alcohol.
Chapter: [0.13] Amines [13.01] Amines
Complete the reaction:
\[\ce{CH3CH2Cl ->[AgCN][alc.\Delta]}\] ?
Chapter: [0.1] Halogen Derivatives
Calculate effective atomic number of \[\ce{[Co(NH3)6]^3+}\] ion.
Chapter: [0.09] Coordination Compounds
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
Chapter: [8.01] D-block Elements
What is the SI unit of molar conductivity?
Chapter: [0.05] Electrochemistry
Write the sign convention of work done during expansion of gas.
Chapter: [0.04] Chemical Thermodynamics
Write the condition of reverse osmosis.
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
Derive an expression for maximum work in isothermal reversible expansion of two moles of an ideal gas.
Chapter: [0.03] Chemical Thermodynamics and Energetic
What are interhalogen compounds?
Chapter: [0.07] Elements of Groups 16, 17 and 18
Write the chemical reaction when chlorine reacts with dry slaked lime.
Chapter: [0.07] Elements of Groups 16, 17 and 18 [7.03] Group 17 Elements
What is nano material?
Chapter: [0.16] Green Chemistry and Nanochemistry
Write the reaction involved in sol-gel process during hydrolysis.
Chapter: [0.16] Green Chemistry and Nanochemistry
Write a classification of proteins with an example.
Chapter: [14.02] Proteins
Calculate the time required to deposit 2.4 g of \[\ce{Cu}\], when 2.03 A of current passed through \[\ce{CuSO4}\], solution. (At. mass of \[\ce{Cu}\] = 63.5 g mol−1)
Chapter: [0.04] Chemical Thermodynamics
Among dimethylamine (pKb = 3.27) and diethylamine (pKb = 3.0), which one is more basic?
Chapter: [13.01] Amines
Explain buffer action of sodium acetate-acetic acid buffer.
Chapter: [0.03] Ionic Equilibria
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Write preparation of diethyl ether.
Chapter: [0.11] Alcohols, Phenols and Ethers
Write preparation of ethyl cyanide from ethyl bromide.
Chapter: [13.02] Cyanides and Isocyanides
Henry's constant for \[\ce{CH3Br_{(g)}}\] is 0.159 mol dm−3 bar−1 25°C. Calculate its solubility in water at 25°C, if its partial pressure is 0.164 bar.
Chapter: [0.02] Solutions
Write the structure and name of monomer of Nylon-6.
Chapter: [0.15] Introduction to Polymer Chemistry [0.15] Polymers
Write the structure and name of monomer of Natural rubber.
Chapter: [0.15] Introduction to Polymer Chemistry [0.15] Polymers
Define lanthanoid contraction.
Chapter: [8.02] F-block Elements
Write the balanced chemical equations when acidified \[\ce{K2Cr2O7}\] reacts with \[\ce{H2S}\].
Chapter: [0.08] Transition and Inner Transition Elements
Obtain the relationship between the density of a substance and the edge length of the unit cell.
Chapter: [0.01] Solid State
Answer the following in one or two sentences.
What is osmotic pressure?
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
How will you determine molar mass of solute from osmotic pressure?
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
Write chemical equation for the following :
Rosenmund reduction
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids [12.01] Aldehydes and Ketones
Write chemical equation for the following:
Gatterman - Koch formylation
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids [12.01] Aldehydes and Ketones
Write the chemical reaction involved in Cannizzaro reaction of methanal.
Chapter: [12.01] Aldehydes and Ketones
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.
Chapter: [0.04] Chemical Thermodynamics
What is the action of following on ethyl bromide?
silver nitrite
Chapter: [0.1] Halogen Derivatives
What is the action of following on ethyl bromide?
\[\ce{Mg}\] in dry ether
Chapter: [0.1] Halogen Derivatives
What is the action of following on ethyl bromide?
alcoholic sodium hydroxide
Chapter: [0.1] Halogen Derivatives
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.
Chapter: [0.06] Chemical Kinetics
Arrange the following in the increasing order of the property mentioned:
\[\ce{HOCl}\], \[\ce{HClO2}\], \[\ce{HClO3}\], \[\ce{HClO4}\] (acidic strength)
Chapter: [0.07] Elements of Groups 16, 17 and 18
Arrange the following in the increasing order of the property mentioned:
\[\ce{MF}\], \[\ce{MCl}\], \[\ce{MBr}\], \[\ce{MI}\] (ionic character)
Chapter: [7.03] Group 17 Elements
Arrange the following in the increasing order of the property mentioned:
\[\ce{HF}\], \[\ce{HCl}\], \[\ce{HBr}\], \[\ce{HI}\] (thermal stability)
Chapter: [0.07] Elements of Groups 16, 17 and 18
Explain Wolf-Kishner reduction reaction.
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids
Write preparation of propanone by using ethanoyl chloride and dimethyl cadmium.
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids [12.01] Aldehydes and Ketones
Write postulates of Werner theory of co-ordination complexes.
Chapter: [0.09] Coordination Compounds
Write the name of a hexadentate ligand.
Chapter: [0.09] Coordination Compounds
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Define electrochemical series.
Chapter: [0.05] Electrochemistry
Write applications of electrochemical series.
Chapter: [0.05] Electrochemistry
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids
Define acids and bases according to Bronsted-Lowry theory.
Chapter: [0.03] Ionic Equilibria
Derive the relationship between pH and pOH.
Chapter: [0.03] Ionic Equilibria
Write reactions involved in preparation of potassium dichromate from chrome iron ore
Chapter: [0.08] Transition and Inner Transition Elements
Convert the following:
acetaldehyde to isopropyl alcohol.
Chapter: [11.01] Alcohols
Convert the following :
cumene to phenol.
Chapter: [0.11] Alcohols, Phenols and Ethers
Convert the following :
anisole to phenol.
Chapter: [11.03] Ethers
Write two uses of neon.
Chapter: [0.07] Elements of Groups 16, 17 and 18 [7.04] Group 18 Elements
Define the Extensive properties.
Chapter: [0.04] Chemical Thermodynamics
Define Intensive property.
Chapter: [0.04] Chemical Thermodynamics
Define Adiabatic process.
Chapter: [0.04] Chemical Thermodynamics
Write the atomic numbers of transuranium elements.
Chapter: [0.08] Transition and Inner Transition Elements
Predict the type of cubic lattice of a solid element having edge length of 400 pm and density is 6.25 g/ml.
(Atomic mass of element = 60)
Chapter: [0.01] Solid State
Define the following term:
Nanoscience
Chapter: [0.16] Green Chemistry and Nanochemistry
Write a chemical reaction for the preparation of the following polymer.
polyacrylonitrile
Chapter: [0.15] Introduction to Polymer Chemistry [0.15] Polymers
Derive an expression for the relation between half-life and rate constant for first-order reaction.
Chapter: [0.06] Chemical Kinetics
Write the net cell reaction during discharging of lead accumulator.
Chapter: [0.05] Electrochemistry
Draw the structure of peroxymonosulphuric acid.
Chapter: [0.07] Elements of Groups 16, 17 and 18
Mention the number of unpaired electrons and geometry of the following complex:
\[\ce{[Ni(Cl)4]^{2-}}\]
Chapter: [0.09] Coordination Compounds
Mention the number of unpaired electrons and geometry of the following complex:
\[\ce{[Ni(CN)4]^2-}\]
Chapter: [0.09] Coordination Compounds
Convert the following:
Ethanenitrile into ethanal.
Chapter:
Convert the following:
Cyclohexene into adipic acid.
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids
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Maharashtra State Board previous year question papers 12th Standard Board Exam Chemistry with solutions 2023 - 2024
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