HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2023-2024
Date & Time: 23rd July 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. Q. No. 2 contains Eight very short answer type of questions carrying One mark each.
- Section B: Q. No. 3 to Q. No. 14 contain twelve short answer type of questions carrying two marks each. (Attempt any Eight).
- Section C: Q. No. 15 to Q. No. 26 contains Twelve short answer type of questions carrying Three marks each. (Attempt any Eight).
- Section D: Q. No. 27 to Q. No. 31 contain Five long answer type of questions carrying Four marks each. (Attempt any Three).
- Use of the log table is allowed. Use of calculator is not allowed.
- Figures to the right indicate full marks.
- For each multiple choice type of question, it is mandatory to write the correct answer along with its alphabet. e.g. (a)........./ (b)........./ (c)........./ (d) etc.
Only the first attempt will be considered for evaluation. - Physical Constants:
Given: R = 8.314 J K−1 mol−1
NA = 6.022 × 1023
F = 96500C
Integrated rate law equation for a zero order reaction is ______.
`K_t = [A]_0 - [A]_t`
`K_t = 2.303 log_10 [A]_0/[A]_t`
`K = ([A]_t - [A]_0)/t`
`K_t = 2.303 log_10 ([A]_t)/[A]_0`
Chapter:
The spin-only magnetic moment of Fe+2 ion is ______.
3.806 BM
4.899 BM
5.796 BM
6.817 BM
Chapter:
The relation between radius of sphere and edge length in simple cubic lattice is ______.
`sqrt3r = 4a`
`sqrt3a = 4r`
`r = a/2`
`sqrt2a = 4r`
Chapter:
The monomer used in the preparation of thermocol is ______.
vinyl chloride
acrylamide
butadiene and acrylonitrile
styrene
Chapter:
Which of the following α-amino acids do not contain chiral centre?
Alanine
Valine
Leucine
Glycine
Chapter:
Neutral complex in the following is ______.
\[\ce{[Co(NO2)3(NH3)3]}\]
\[\ce{[Co(NH3)5CO3]Cl}\]
\[\ce{Na3[Co(NO2)6]}\]
\[\ce{[Co(C2O4)3]^3-}\]
Chapter:
The reaction used to convert toluene to benzaldehyde is known as ______.
Etard's reaction
Gatterman-Koch formylation reaction
Friedel-Crafts reaction
Swartz reaction
Chapter:
A better reagent to convert primary alcohol to aldehyde is ______.
Chromic anhydride
Pyridinium chlorochromate
Potassium permanganate
Potassium dichromate
Chapter:
Write the name of insecticide which is effectively used instead of DDT.
Chapter:
Write the name or formula of hydrocarbon formed when methyl magnesium iodide is treated with ammonia.
Chapter:
Calculate emf of the cell at 25°C.
Zn(s) | Zn2+ (0.08 M) || Cr3+ (0.1 M) | Cr(s)
E°Zn = −076V, E°Cr = −0.74V.
Chapter: [0.05] Electrochemistry
Write the electronic configuration of Zn2+ ion. (Atomic number of zinc is 30).
Chapter:
Write the IUPAC name of amine formed when acetamide undergoes Hofmann bromamide degradation.
Chapter:
Write the condition for spontaneity of reaction with respect to entropy.
Chapter:
Write the relation between van't Hoff factor and degree of dissociation of an electrolyte.
Chapter:
The normal boiling point of ethyl acetate is 77.06 °C. A solution of 50 g of non-volatile solute in 150 g ethyl acetate boils at 82.60 °C. Calculate molar mass of solute. [Kb = 2.77°C kg mol−1]
Chapter:
Write the mathematical equation for the first law of thermodynamics for:
Isothermal process
Chapter: [0.04] Chemical Thermodynamics
Write mathematical equation of first law of thermodynamics for Isochoric process.
Chapter: [0.03] Chemical Thermodynamics and Energetic
Complete the following equation:
XeF2 + H2O →
Chapter: [0.07] Elements of Groups 16, 17 and 18 [7.04] Group 18 Elements
Complete the following equation:
\[\ce{Xe + F_2 ->[Electric discharge][Low temperature]?}\]
Chapter:
Differentiate between ionic crystals and covalent crystals.
Chapter:
What is the mass of Cu metal produced at the cathode during the passage of 5 ampere of current through CuSO4 solution for 100 minutes? [Molar mass of Cu = 63.5 g mol−1].
Chapter:
Define buffer solution.
Chapter: [0.03] Ionic Equilibria
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Write the Henderson Hasselbalch equation for acidic buffer.
Chapter:
Explain any three principles of green chemistry.
Chapter: [0.16] Green Chemistry and Nanochemistry
Write the reaction for the preparation of Nylon-6.
Chapter: [0.15] Polymers
Define pyrometallurgy.
Chapter: [0.08] Transition and Inner Transition Elements
Write the reaction when ethylamine is treated with excess of ethyl bromide.
Chapter:
Write the reaction when ethylamine is treated with Hinsberg's reagent.
Chapter:
Construct a cell using standard hydrogen electrode and zinc electrode. Write its cell reaction and cell representation. Calculate cell potential of a cell with 0.01 M Zn2+ ions. Standard potential of a cell is + 0.76 V.
Chapter:
State Henry's law.
Chapter: [0.02] Solutions and Colligative Properties
Calculate the standard enthalpy of the reaction:
SiO2(s) + 3C(graphite) → SiC(s) + 2CO(g) from the following reactions:
- Si(s) + O2(g) → SiO2(s), ΔrH° = −911kJ
- 2C(graphite) + O2(g) → 2CO(g), ΔrH° = −221kJ
- Si(s) + C(graphite) → SiC(s), ΔrH° = −65.3kJ
Chapter: [0.04] Chemical Thermodynamics
Derive Ostwald's dilution law for the CH3COOH.
Chapter: [0.03] Ionic Equilibria
Obtain relation between solubility product and its solubility for Al(OH)3
Chapter:
In a first-order reaction A → B, 60% of a given sample of a compound decomposes in 45 mins. What is the half-life of reaction? Also, write the rate law equation for the above first-order reaction.
Chapter: [0.06] Chemical Kinetics
Write the factors which are related to the colour of transition metal ions.
Chapter: [8.01] D-block Elements
Write the alloy used in fischer Tropsch process.
Chapter:
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Write anomalous behaviour of oxygen with respect to atomicity.
Chapter:
Write anomalous behaviour of oxygen with respect to magnetic property.
Chapter:
Write anomalous behaviour of oxygen with respect to the oxidation state.
Chapter:
Draw the zwitter ion structure for sulphanilic acid.
Chapter:
Identify A, B, C and rewrite the chemical reactions:
\[\ce{H3C - CH2Cl + KOH_{(aq)} ->[Δ] 'A' ->[hot Cu][powder] 'B' ->[K2Cr2O7][dil H2SO4] 'C'}\]
Chapter:
Explain optical isomerism in 2-chlorobutane.
Chapter: [0.1] Halogen Derivatives
Write Clemmenson's reduction reaction of propanone.
Chapter:
How is dioxygen prepared in the laboratory from KClO3?
Chapter: [0.07] Elements of Groups 16, 17 and 18
How is phenol converted into the following?
benzoquinone
Chapter: [0.11] Alcohols, Phenols and Ethers [11.01] Alcohols [11.02] Phenols [11.03] Ethers
Write the chemical reaction to convert phenol to cyclohexanol.
Chapter:
Define the Standard enthalpy of combustion.
Chapter: [0.04] Chemical Thermodynamics
Define the Enthalpy of atomization
Chapter: [0.03] Chemical Thermodynamics and Energetic
Write the structure of D-ribose.
Chapter: [0.14] Biomolecules
Distinguish between Order and Molecularity of reaction.
Chapter: [0.06] Chemical Kinetics
Answer the following in brief.
Write electrode reactions for the electrolysis of aqueous NaCl.
Chapter: [0.05] Electrochemistry
Gold crystallises into face-centred cubic cells. The edge length of a unit cell is 4.08 × 10–8 cm. Calculate the density of gold. [Molar mass of gold = 197 g mol–1]
Chapter: [0.01] Solid State
Answer the following
Which flower is an example of self-cleaning?
Chapter: [0.16] Green Chemistry and Nanochemistry
Write the monomer used for the preparation of PVC.
Chapter:
Explain the formation of [Co(NH3)6]3+ ion on the basis of Valence bond theory.
Chapter:
Give a balanced equation for the following:
Conversion of acetic acid to ethyl acetate.
Chapter:
Write chemical reactions for the following conversion:
Acetic acid into ethyl alcohol
Chapter: [0.11] Alcohols, Phenols and Ethers [11.01] Alcohols [11.02] Phenols [11.03] Ethers
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