HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2018-2019
Date & Time: 27th February 2019, 11:00 am
Duration: 3h
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A compound used as pistachio flavour in ice cream is ___________
vanillin
acetophenone
muscone
butyraldehyde
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids [12.01] Aldehydes and Ketones
Oxidation states of scandium are ___________.
+1, +2
+1, +3
+2, + 3
+3, +4
Chapter: [8.01] D-block Elements
In Van Arkel method for refining zirconium or titanium, the halogen used is __________.
fluorine
chlorine
bromine
iodine
Chapter: [0.06] General Principles and Processes of Isolation of Elements
A system absorbs 6 kJ of heat and does 1.5 kJ of work on its surroundings. The change in internal energy is __________.
– 7.5 kJ
– 4.5 kJ
+4.5 kJ
+ 7.5 kJ
Chapter: [0.03] Chemical Thermodynamics and Energetic
Write the molecular formula of noverstrol.
Chapter: [16.01] Chemicals in Medicines
Write the number of hydroxyl groups present in α - D (+) -Glucopyranose (trans.)
Chapter: [14.01] Carbohydrates
What is Nessler’s reagent ?
Chapter: [7.01] Group 15 Elements
What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure?
Chapter: [0.01] Solid State
What are antacids?
Chapter: [16.01] Chemicals in Medicines
Write the main constituents of dettol.
Chapter: [11.02] Phenols
Draw a neat, well labelled diagram of electrolytic cell for extraction of aluminium
Chapter: [0.06] General Principles and Processes of Isolation of Elements
How many faradays of electricity are required to produce 6 g of Mg from MgCl2?
Chapter: [0.04] Electrochemistry [0.05] Electrochemistry
The molar conductivity of 0.05 M BaCl2 solution at 25° C is 223Ω-1 cm2 mol-1. What is its conductivity?
Chapter: [0.05] Electrochemistry
Derive van’t Hoff general solution equation.
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
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Write the conditions for maximum work done by the system.
Chapter: [0.03] Chemical Thermodynamics and Energetic
Write balanced chemical equation for the following :
Action of sodium metal on ethanol.
Chapter: [11.01] Alcohols
Write balanced chemical equation for the following :
Action of zinc dust on phenol.
Chapter: [11.02] Phenols
Write chemical reaction to prepare the following polymer: Teflon
Chapter: [0.15] Introduction to Polymer Chemistry [0.15] Polymers
Write chemical reaction to prepare the following polymer :
Nylon - 6
Chapter: [0.15] Polymers
Write chemical reaction to prepare the Dextron polymer:
Dextron
Chapter: [0.15] Polymers
How is glucose prepared by commercial method? How is peptide linkage formed?
Chapter: [14.01] Carbohydrates
Write a short note on Hofmann elimination
Chapter: [0.13] Amines
What is the action of the following on ethyl bromide
alcoholic solution of potassium hydroxide.
Chapter: [10.01] Haloalkanes
What is the action of the following on ethyl bromide:
moist silver oxide
Chapter: [10.01] Haloalkanes
What is the action of the following on ethyl bromide:
silver acetate
Chapter: [10.01] Haloalkanes
What is effective atomic number? Calculate effective atomic number of copper ( Z = 29 ) in (Cu ( NH3)4)2+
Chapter: [0.09] Coordination Compounds
Write chemical reactions for different steps in the manufacture of sulphuric acid by lead chamber process. Draw the structure of phosphorous pentachloride
Chapter: [7.02] Group 16 Elements
Write Arrhenius equation. Derive an expression for temperature variations
Chapter:
Write applications of electrochemical series.
Chapter: [0.05] Electrochemistry
Define electrochemical series.
Chapter: [0.05] Electrochemistry
Calculate the work done in the following reaction at 50°C. State whether work is done on the system or by the system.
`"SO"_2("g") + 1/2"O"_(2("g")) rightarrow "SO"_(3("g"))`
Chapter: [0.03] Chemical Thermodynamics and Energetic
The standard enthalpy of combustion of formaldehyde Δ0H0 = -571 kJ. How much heat will be evolved in the formation of 22 g of CO2?
Chapter: [0.03] Chemical Thermodynamics and Energetic
Define the following term:
isotonic solution
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
Define the following term:
hypertonic solution
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
Define the following term:
hypotonic solution
Chapter: [0.02] Solutions [0.02] Solutions and Colligative Properties
Distinguish between crystalline solids and amorsphous solids.
Chapter: [0.01] Solid State [0.01] Solid State
Define Anisotropy.
Chapter: [0.01] Solid State [0.01] Solid State
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Write the structure of Phenylmethanamine.
Chapter: [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 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 :
Fischer esterificatione
Chapter: [12.02] Carboxylic Acids
Write chemical equation for the following :
Hell - Vohlard - Zelinsky reaction
Chapter: [12.02] Carboxylic Acids
How will you convert calcium acetate to acetaldehyde?
Chapter: [0.12] Aldehydes, Ketones and Carboxylic Acids [12.01] Aldehydes and Ketones
How will you convert acetone to acetone cyanohydrin?
Chapter: [12.01] Aldehydes and Ketones
How will you convert sodium acetate to methane?
Chapter: [12.01] Aldehydes and Ketones
How will you convert benzoic acid to m-bromobenzoic acid?
Chapter: [12.01] Aldehydes and Ketones
Define Enantiomers.
Chapter: [10.01] Haloalkanes [10.02] Haloarenes
How is potassium dichromate prepared from chrome iron ore?
Chapter: [8.01] D-block Elements
Explain the position of actinoids in the periodic table.
What is the action of sulphur on lanthanoids? Calculate the magnetic moment of divalent ion in aqueous solution it its atomic number is 24.
Chapter: [8.01] D-block Elements
The rate of a first order reaction, A →B is 5.4 ×10-6
Ms-1when [A] is 0.3M. Calculate the rate constant of the reaction.
Chapter:
Explain the following properties of group 16 elements :
1) Electro negativity
2) Melting and boiling points
3) Metallic character
4) Allotropy
Chapter: [7.02] Group 16 Elements
The half life period of a first order reaction is 6. 0 h . Calculate the rate constant
Chapter: [0.05] Chemical Kinetics [0.06] Chemical Kinetics
What are oxides? Write different types of oxides with one example each.
Chapter: [7.02] Group 16 Elements
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