HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2015-2016
Date & Time: 29th February 2016, 11:00 am
Duration: 3h
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CHEMISTRY
(PHYSICAL AND INORGANIC CHEMISTRY)
Notes:
- All questions are compulsory.
- Answers of both the sections should be written in same answer book.
- Draw well labelled diagrams and write balanced equations wherever necessary.
- Figures to the right indicate full marks.
- Use of logarithmic table is allowed.
- Every new question must be started on a new page.
Iron (z=26) is highly ferromagnetic. Explain.
Chapter: [0.01] Solid State
Define boiling point
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
Write the formula to determine the molar mass of a solute using freezing point depresssion method.
Chapter: [0.02] Solutions and Colligative Properties
Write mathematical equation of first law of thermodynamics for the following processes :
Adiabatic process.
Chapter: [0.03] Chemical Thermodynamics and Energetic
Write mathematical equation of first law of thermodynamics for Isochoric process.
Chapter: [0.03] Chemical Thermodynamics and Energetic
Explain a graphical method to determine activation energy of a reaction.
Chapter: [0.05] Chemical Kinetics
Write the names and chemical formulae of any one ore of iron.
Chapter: [0.06] General Principles and Processes of Isolation of Elements
Write the names and chemical formulae of any one ore of zinc.
Chapter: [0.06] General Principles and Processes of Isolation of Elements
What is the action of sodium on arsenic.
Chapter: [7.01] Group 15 Elements
What is the action of Magnesium on bismuth.
Chapter: [7.01] Group 15 Elements
Define enthalpy of sublimation.
Chapter: [0.03] Chemical Thermodynamics and Energetic
How is enthalpy of sublimation related to enthalpy of fusion and enthalpy of vaporization?
Chapter: [0.03] Chemical Thermodynamics and Energetic
What are Ellingham's diagrams? Write 2 features of it.
Chapter: [0.06] General Principles and Processes of Isolation of Elements
Write features of Ellingham's diagrams
Chapter: [0.06] General Principles and Processes of Isolation of Elements
Silver crystallises in FCC structure. If density of silver is 10.51 gcm-3, calculate the volume of unit cell. [Atomic mass of slive (Ag) = 108 gm-1]
Chapter: [0.01] Solid State
The vapour pressure of pure benzene is 640mm og Hg. 2.175×10-3kg of non-vloatile solute is added to 39 gram of benzene the vapour pressure of solution is 600mm of HG. Calculate molar mass of solute.
[C = 12, H = 1]
Chapter: [0.02] Solutions and Colligative Properties
Calculate C-Cl bond enthalpy from following reaction:
CH3Cl(g) + Cl2(g) → Ch2Cl2(g) + HCl(g) ΔH° = -104KJ
If C-H, Cl-Cl and H-Cl bond enthalpies are 414, 243 and 431 KJ-Mol-1 respectively.
Chapter: [0.03] Chemical Thermodynamics and Energetic
Draw a neat and well labelled diagram of primary reference electrode.
Chapter: [0.04] Electrochemistry
Write four points of differences between properties of nitrogen and other elements of group 15.
Chapter: [7.01] Group 15 Elements
Explain the structure of ClF3
Chapter: [7.03] Group 17 Elements
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Conductivity of a solution is 6.23 x 10-5 Ω-1cm-1 and its resistance is 13710Ω. If the electrodes are 0.7cm apart, calculate the cross-sectional area of electrode.
Chapter: [0.04] Electrochemistry
Why is molality of a solution independent of temperature?
Chapter: [0.02] Solutions and Colligative Properties
What are neutral oxides?
Chapter: [7.02] Group 16 Elements
Explain the nature of zinc oxide with the help of the reactions.
Chapter: [7.02] Group 16 Elements
Define "Molar conductivity".
Chapter: [0.04] Electrochemistry
Define “zero order reaction”.
Chapter: [0.05] Chemical Kinetics
In a first order reaction x → y, 40% of the given sample of compound remains unreacted in 45 minutes. Calculate rate constant of the reaction.
Chapter: [0.05] Chemical Kinetics
Define “zero order reaction”.
Chapter: [0.05] Chemical Kinetics
The molecular formula H2S2O2 represents which oxoacid?
- Hydrosulphurous acid
- Thiosulphurous acid
- Sulphuric acid
- Pyrosulphurous acid
Chapter: [7.02] Group 16 Elements
Iodine exists as
- polar molecular solid
- ionic solid
- nonpolar molecular solid
- hydrogen bonded molecular solid
Chapter: [7.03] Group 17 Elements
Absolute entropies of solids, liquids and gases can be determined by
- Measuring heat capacity of substance at various temperatures
- Subtracting standard entropy of reactants from products
- Measuring vibrational motion of molecules
- Using formula ΔS° = ST° - SO°
Chapter: [0.03] Chemical Thermodynamics and Energetic
The determination of molar mass from elevation in boiling point is called as
- cryoscopy
- colorimetry
- ebullioscopy
- spectroscopy
Chapter: [0.02] Solutions and Colligative Properties
The process of leaching alumina, using sodium carbonate is called
- Bayer's process
- Decomposition
- Cyanide process
- Hall's process
Chapter: [0.06] General Principles and Processes of Isolation of Elements
On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be
- 1
- 2
- 3
- 4
Chapter: [0.04] Electrochemistry
A → B is a first order reaction with rate 6.6 × 10-5m-s-1. When [A] is 0.6m, rate constant of the reaction is
- 1.1 × 10-5s-1
- 1.1 × 10-4s-1
- 9 × 10-5s-1
- 9 × 10-4s-1
Chapter: [0.05] Chemical Kinetics
Why is Sc3+ colourless while Ti3+ coloured? (Atomic number Sc = 21, Ti =22)
Chapter: [8.01] D-block Elements
Illustrate with example, the difference between a double salt and a co-ordination compound
Chapter: [0.09] Coordination Compounds
How is chlorobenzene prepared from aniline?
Chapter: [13.01] Amines
How is chlorobenzene converted into diphenyl/biphenyl?
Chapter: [10.02] Haloarenes
What is metamerism?
Chapter: [0.11] Alcohols, Phenols and Ethers [11.01] Alcohols [11.02] Phenols [11.03] Ethers
Explain metamerism with suitable examples of ethers
Chapter: [0.11] Alcohols, Phenols and Ethers [11.01] Alcohols [11.02] Phenols [11.03] Ethers
What are ketones?
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids [12.01] Aldehydes and Ketones
How are ketones classified?
Chapter: [12.01] Aldehydes and Ketones
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How is 1-nitropropane prepared from suitable oxime?
Chapter: [12.02] Carboxylic Acids
How are 2 - nitropropane prepared from suitable oxime?
Chapter: [12.02] Carboxylic Acids
Draw structure of BHT.
Chapter: [16.02] Chemicals in Food
Write the reaction for the preparation of Nylon-6.
Chapter: [0.15] Polymers
What are f-block elements?
Chapter: [8.02] F-block Elements
Distinguish between lanthanoid and actinoids.
Chapter: [0.08] Transition and Inner Transition Elements [8.02] F-block Elements
Explain Optical activity
Chapter: [0.09] Coordination Compounds
What are ligands?
Chapter: [0.09] Coordination Compounds
What are interstitial compounds?
Chapter: [8.01] D-block Elements
Write the formula of Tetraminodichloroplatinum (IV) chloridex.
Chapter: [0.09] Coordination Compounds
How is propene converted into 1- bromopropane and 2 - bromopropane?
Chapter: [10.01] Haloalkanes
Define Broad-spectrum antibiotics with a suitable example?
Chapter: [16.01] Chemicals in Medicines
How are polythene and neoprene prepared?
Chapter: [0.15] Polymers
Explain the mechanism of esterification
Chapter: [12.02] Carboxylic Acids
Write the reactions involved in dehydration of 1°, 2° and 3° alcohols.
Chapter: [11.01] Alcohols
Name any two diseases caused by deficiency of Vitamin A
Chapter: [14.03] Vitamins
Write the structure of a nucleoside
Chapter: [14.04] Nucleic Acids
Write the structure of a nucleotide
Chapter: [14.04] Nucleic Acids
How are 1 - nitropropane, 2-nitropropane and 2-methyl 2- nitropropane are distinguished from each other using nitrous acid?
Chapter: [13.01] Amines
The preparation of alkyl fluoride from alkyl chloride, in presence of metallic fluorides is known as ______________.
Williamson’s reaction
Finkelstein reaction
Swarts reaction
Wurtz reaction
Chapter: [10.01] Haloalkanes
Identify the weakest acidic compound amongst the following
(a) p-nitrophenol
(b) p-chlorophenol
(c) p-cresol
(d) p-raminophenol
Chapter: [11.02] Phenols
On acid hydrolysis, propane nitrile gives.
Propanal
Acetic acid
Propionamide
Propanoic acid
Chapter: [12.02] Carboxylic Acids
Which of the following amines yields foul smelling product with holoform and alcoholic KOH?
(a) Ethyl amine
(b) Diethyl amine
(c) Triethyi amine
(d) Ethyl methyl amine
Chapter: [13.01] Amines
Which of the following NOT present in DNA?
(a) adenine
(b) Guanine
(c) Thymine
(d) Uracil
Chapter: [14.04] Nucleic Acids
Amongst the followings, identify a copolymer?
(a) Orion
(b) PVC
(c) PHBV
(d) Teflon
Chapter: [0.15] Polymers
Phenelzine is used as an
(a) analgesic
(b) antiseptic
(c) antipyretic
(d) antidepressant
Chapter: [11.02] Phenols
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