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Important Guess Papers Karachi
Board
2010-2011
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Class 9th Chemistry Guess Paper
2011 |
Important
Definitions:
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Chemistry
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Atomic mass
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Atomic number
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Periodicity
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Metals
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Molarity
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Chemical reaction
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Radioactivity
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Electronegativity
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Ionization potential
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Atomic radii
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Formula mass
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Mole
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Molar mass
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Avogadros number
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Co-efficient
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Brownian movement
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Faraday
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Coloumb
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Ampere
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Electron affinity
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Homologous series
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Functional group
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Aliphatic hydrocarbon
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Alicyclic hydrocarbon
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Aromatic hydrocarbon
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Alkanes
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Alkenes
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Alkynes
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Isotopes
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Oxidation
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Reduction
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Oxidizing agent
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Reducing agent
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Allotropy
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Aqua regia
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Isomerism
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Monoprotic acid
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Poly protic acid
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Neutralization or titration
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Ore
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Minerals
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Gangue
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Tempering
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sublimation
Important Differences:
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Solution and suspension
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Diamond and graphite
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Saturated and unsaturated solution
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Molarity and normality
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Electrolytes and non electrolytes
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Conductors and insulators
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Ordinary and heavy water
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Thermoplastic and thermosetting plastic
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Alpha, beta and gema rays
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Ionic and covalent bond
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Covelent and co-ordinate covalent bond
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Exothermic and endothermic reaction
Important Preparations:
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Laboratory preparation of chlorine
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Industrial preparation of HNO3 by Ostwald Process
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Industrial preparation of H2SO4 by Contact process
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Industrial Preparation of NaHCO3 sodium Bi Carbonate
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Industrial Preparation of Caustic Soda NaOH
by Castner- Kellner Cell and Nelson Cell.
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Industrial Preparation Of Washing Soda Na2CO3.10H2O
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Preparation of Methane
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Preparation of Ethene
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Preparation of Ethyne
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Extraction of Sulphur by Herman Frasch Process
Write Properties:
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Cathode rays
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Anode rays
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Periodic group V, Vll, lll
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Ethyne gas
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Portable water
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Alkali metals
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Halogens
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Noble gases
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Transition elements
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Use of chlorine gas
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Use of Ammonia gas
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Uses of H2O2
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Sillicon
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Silica jel
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Water glass
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Methane gas
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Hydrogen gas
Important Questions:
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Branches of Chemistry
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Scientific method
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Types of Chemical reaction
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Bohrs atomic model
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Mandeleeve’s periodic law
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Define solubility abd briefly write the effect
of temperature on solubility.
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Name the solute and solvent in the following
solutions Butter, foam, haze
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Electroplating and its uses
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PH, its range and effect of raise and fall of
Ph value in human blood on health.
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Electolysis of NaCl
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How Aqua regia dissolve gold?
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What are soap? Describe the two raw materials
used in the preparation of soap? Define Saponification?
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Causes of food spoilage and food preservation
method
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Oxidation and reduction in terms of transfer
of electron
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Allotropic forms of Sulphur
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Ores of coppers and their formulae
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Oxide and its kinds
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Deltons atomic theory and its defects
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Discovery of electron
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Capacity of K shell, L Shell, and M Shell
Plastic and its types
Important laws:
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Faraday's first and second law of eletrolysis
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Law of conservation of mass
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Law of constant composition
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Dobereiner's law
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Newland's law
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Arhenius concept of acid and base
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Lowry and Bronsted concept
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Lewis concept
Important Numericals:
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Calculate the number of Oxygen atoms in 4 gm
of Oxygen.
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How many moles of Oxygen required to burn
10 moles of ethane gas
C2H4 +3O2----------2CO2 +2H2O
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Calculate the Molar Masses of the followincompounds?
Al2(SO4)3
K4F3(CN)6
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Calculate how many grams of CaCO3 use to obtain
8 moles of CaO?
CaCO3--------CaO + CO2
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Calculate the molarity of an aquous solution
that contains 5.3gm of Sodium carbonate dissolved in 500 cm3
solution. (Atomic Masses; Na = 23, C = 12, O = 16)
A) CO2
B) H2O
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Calculate the PH and POH of 0.8 M of H2O?
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A current of 5 ampere was passed through a solution
of CuSO4 for one hour, calculate the mass of the copper metal
deposited on the cathode.( Z of copper = 0.000329gm/c)
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How many grams of oxygen gas is liberated by
the electrolysis of water after passing 0.0565 ampere for 185
seconds.
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The formula for rust is Fe2O3. how many moles
of Fe are present in 30 gms of rust?
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Find the empirical formula of C6H6?
- Calculate the silver deposited when a 10 ampere electric current
is passed through a solution of AgNO3 for 50 minutes. (Electrochemical
Equivalent of silver =0.00118 gm/C)
Reasons:
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Common salt dissolve in water but not in petrol
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Cold drinks are bottled under a CO2 pressure
greater than 1 atm.
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100 ml solution of KNO3 can not hold more than
37gm of KNO3 in dissolved states
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Guesspapers Karachi Board for Class
IX, X, (9th, 10th) Exams Guess Papers 2010, 2011, Karachi, Pakistan |
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