HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2022-2023
Date & Time: 24th July 2023, 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 contain 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) ...... No mark(s) shall be given if ONLY the correct answer or the alphabet of the correct answer is written. Only the first attempt will be considered for evaluation.
- Physical Constants:
Avogadro Number= NA= 6.022 × 1023
Anisole on heating with concentrated HI gives ______.
Iodobenzene
Phenol + Methanol
Phenol + Iodomethane
Iodobenzene + methanol
Chapter: [11] Alcohols, Phenols and Ethers
Which solution shows positive deviation from Raoult’s law?
Phenol and Aniline
Chloroform and Acetone
Ethanol and Acetone
Chloroform and Ethanol
Chapter:
The coordination number of cobalt in [CoCl2(en)2]+ is ______.
6
4
2
0
Chapter:
The name of the above reaction is ______.
Etard reaction
Friedel craft acylation reaction
Stephan reaction
Gatterman-Koch reaction
Chapter:
Which is an example of thermoplastic polymer?
Bakelite
Polystyrene
Nylon 6, 6
Urea formaldehyde resin
Chapter:
Nichrome is an alloy of ______.
Cu, Sn
Cu, Ni
Ni, Cr
Fe, Cr
Chapter:
Identify ‘A’ in the following reaction:
Bromobenzene
1, 4-dichlorobenzene
Naphthalene
Chlorobenzene
Chapter:
Which amine does NOT react with Hinsberg reagent?
Ethanamine
N-ethylethanamine
N, N-diethylethanamine
2-methyl-propan-2-amine
Chapter:
The dissociation constant for NH4OH is 1.8 × 10−5. The degree of dissociation in its 0.01 M solution is ______.
0.04242
0.4242
0.004242
4.242
Chapter:
Half-life of a first order reaction is 30 minutes at 300 K. The value of its rate constant, K is ______.
2.31 min−1
0.0231 min−1
0.231 min−1
2.310 × 10−3 min−1
Chapter:
Write the name of the radioactive element in group 16.
Chapter:
Write the number of particles present in FCC per unit cell.
Chapter:
Name the γ-isomer of BHC.
Chapter: [16] Green Chemistry and Nanochemistry
Which alloy is used in the Fischer-Tropsch process in the synthesis of gasoline?
Chapter: [8] Transition and Inner Transition Elements
Three moles of an ideal gas are expanded isothermally from 15 dm3 to 20 dm3 at a constant external pressure of 1.2 bar. Calculate the amount of work in Joules.
Chapter: [4] Chemical Thermodynamics
Write postulates of Werner theory of co-ordination complexes.
Chapter: [9] Coordination Compounds
Why does fluorine show anomalous behaviour in ‘17 group’ elements?
Chapter:
What is the mass of Cu metal produced at the cathode during the passage of 5 ampere current through CuSO4 solution for 6000 seconds? Molar mass of Cu is 63.5 g mol−1.
Chapter:
How is glucose prepared from cane sugar (sucrose)?
Chapter: [14.01] Carbohydrates
Derive integrated rate law for zero order reaction.
Chapter: [6] Chemical Kinetics
The normal boiling point of ethyl acetate is 77.06°C. A solution of 50 g of a non-volatile solute in 150 g of ethyl acetate boils at 84.27°C. Evaluate the molar mass of solute if Kb for ethyl acetate is 2.77°C kg mo1−1.
Chapter:
How is phenol prepared from cumene?
Chapter: [11.02] Phenols
Why do the d-block elements form coloured compounds?
Chapter: [8.01] D-block Elements
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Write a note on the Wolf-Kishner reduction reaction.
Chapter:
Write the preparation of nylon 6, 6.
Chapter: [15] Introduction to Polymer Chemistry
Calculate the standard enthalpy of the reaction, \[\ce{SiO2_{(s)} + 3C_{(graphite)} -> SiC_{(s)} + 2CO_{(g)}}\] from the following reactions:
- \[\ce{Si_{(s)} + O2_{(g)} -> SiO2_{(s)}}\], ΔrH0 = −911 kJ
- \[\ce{2C_{(graphite)} + O2_{(g)} -> 2CO_{(g)}}\], ΔrH0 = −221 kJ
- \[\ce{Si_{(s)} + C_{(graphite)} -> SiC_{(s)}}\], ΔrH0 = −65.3 kJ
Chapter: [4] Chemical Thermodynamics
Write a short note on the following:
Hoffmann’s bromamide reaction
Chapter: [13] Amines [13.01] Amines
Write any three advantages of nanoparticles and nanotechnology.
Chapter: [16] Green Chemistry and Nanochemistry
State disadvantages of nanoparticles and nanotechnology.
Chapter: [16] Green Chemistry and Nanochemistry
Write the molecular formula and structure of sulphuric acid.
Chapter:
Write the molecular formula and structures of the peroxy monosulphuric acid.
Chapter: [7.02] Group 16 Elements
Write the molecular formula and structure of thiosulphuric acid.
Chapter:
Explain optical activity of 2-chlorobutane.
Chapter: [10] Halogen Derivatives
Write the different oxidation states of manganese.
Chapter: [8.01] D-block Elements
Why +2 oxidation state of manganese is more stable?
Chapter: [8.01] D-block Elements
Write the preparation of ethanol from methyl magnesium iodide.
Chapter: [11] Alcohols, Phenols and Ethers
Prepare the following by using methyl magnesium iodide:
Propan-2-ol
Chapter:
Prepare the following by using methyl magnesium iodide:
2-methylpropan-2-ol
Chapter:
Derive the relation between freezing point depression and molar mass of solute.
Chapter: [2] Solutions
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Write any four applications of buffer solution.
Chapter: [3] Ionic Equilibria
An element with molar mass 27 g/mol forms a cubic unit cell with edge length of 405 p.m. If the density of the element is 2.7 g/cm3, what is the nature of the cubic unit cell?
Chapter: [1] Solid State
On the basis of valence bond theory, explain the nature of bonding in the [Ni(Cl)4]2− complex ion.
Chapter:
How will you convert sodium acetate to methane?
Chapter: [12.01] Aldehydes and Ketones
Write Arrhenius equation and explains the terms involved.
Chapter:
How will you determine activation energy from rate constants at two different temperatures?
Chapter: [6] Chemical Kinetics
What are interhalogen compounds?
Chapter: [7] Elements of Groups 16, 17 and 18
Write any two characteristics of interhalogen compounds.
Chapter: [7] Elements of Groups 16, 17 and 18
Draw the Fischer projection formula for α-D-(t) glucose.
Chapter:
Write the reactions involved in the preparation of Teflon.
Chapter: [15] Introduction to Polymer Chemistry [15] Polymers
Describe the construction and working of Standard Hydrogen Electrode.
Chapter:
Write any two difficulties of setting SHE (Standard Hydrogen Electrode).
Chapter: [5] Electrochemistry
Write any two statements of the first law of thermodynamics.
Chapter:
For a certain reaction ΔH0 is −224 kJ and ΔS0 is −153 J K−1. At what temperature the change over from spontaneous to non-spontaneous will occur?
Chapter: [4] Chemical Thermodynamics
Write the environmental effect of methylene chloride.
Chapter:
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