10th Matric Class Chemistry Guess Paper 2018 Lahore Board

Lahore Board Chemistry Guess Paper

 

 

    • Give importance of equilibrium constant.
    • What is a Static equilibrium? Explain with an example.
    • How can you know that a reaction has achieved an equilibrium state?
    • Write equilibrium constant expression for the reaction. H2 + 12 Fa 2HI
    • Write equation of forward reaction between hydrogen and iodine.
    • Define hydrogenation. Give an example.
    • How bleaching powder reacts with hydrogen peroxide?
    • Describe the physical properties of sodium hydrogen carbonate.
    • Write uses of hydrogen acid.
    • Write down the uses of hydrogen peroxide.
    • How hydrogen bonding enables water to dissolve different substances?
    • Give process of hydrogenation of alkenes with chemical equation.
    • What is hydrogenation reaction? Give chemical equation.
    • Write down any two uses of pH.
    • How can we measure pH of a solution?
    • Define pH. What is the pH of pure water?
    • Why pure water is not a strong electrolyte?
    • Find the pH of .001 M solution of KOH.
    • Which salts are responsible for hardness of water?
    • Why salt is neutral? Explain with an example.
    • What are acidic salts? Write one chemical equation of their reaction with bases.
    • Write condensed formula of any two hydro carbons.
    • Write names of any two methods of preparation of salts.
    • Give the reactions of chlorine with hydro carbons.
    • What are closed chain hydrocarbons? Give two examples.
    • What are saturated and unsaturated hydrocarbon, give example?
    • Why are hydrocarbons considered as parent organic compounds?
    • How hydro carbons act as fuel?
    • Give difference between saturated and unsaturated hydro carbon.
    • Write the names and general formulas of unsaturated hydro carbons.
    • Give two uses of Methane.
    • What are cyclic and acyclic compounds?
    • What happens when methane is treated with chlorine in the presence of bright sunlight?
    • How are alkyl halides reduced?
    • What is Dehydrohalogenation of Alkyl Halides?
    • Write sources of vitamins A and D.
    • Write names of water soluble vitamins.
    • Justify water soluble vitamins are not injurious to health.
    • What are Fat Soluble Vitamins? Write their examples.
    • Write down diseases born by the deficiency of vitamin A.
    • Write uses of Vitamin-D.
    • Write the names and formulae of two fatty acids.
    • What are fatty acids? Give one example.
    • What is Ribonucleic Acid (RNA)?
    • What do DNA and RNA stand for?
    • What is RNA? Write its function.
    • Differentiate between atmosphere and environment.
    • What is the function of DNA?
    • Give the name of different layers of atmosphere around the earth.
    • How CO2 is responsible for heating up atmosphere?
    • How is the temperature of atmosphere maintained?
    • What threats are to human health due to SO2 gas as air pollutant?
    • What is air pollutant? Give example of primary and secondary air pollutants.
    • How incineration of waste material causes air pollution?
    • How can we remove the hardness from water.
    • What are two effects of water pollution?
    • Write types of hardness of water.
    • Describe the difference between temporary and permanent hardness of water.
    • How is hardness of water removed by Clark’s method?
    • What are Fertilizers?
    • Write two disadvantages of hard water.
    • What is function of fertilizer?
    • What is an industrial waste?
    • How nitrogen is separated from oxygen during industrial preparation of nitrogen?
    • Name two acids used in the manufacture of fertilizers.
    • How are oxides fron, nitrogen formed in internal combustion engine? Write chemical equation.
    • Give equations for the reaction of chlorine with metals.
    • What process are involved in extraction of metal?
    • How extraction of metal takes place from the concentrated ore?
    • What is meant by electromagnetic separation?
    • Write electromagnetic separation process.
    • How ammonia (NH3)is prepared by Haber’s process?
    • Give the reaction of formation of Ammonia in the process in the form of equation.
    • How Ammonia is recovered in the Solvay’s process?
    • Why Urea is an important compound?
    • How ammonia is prepared for the synthesis of urea?
    • Write raw materials for manufacturing urea.
    • What is the ralationship between active mass and rate of reaction?
    • Define Law of Mass Action.
    • Describe the difference between Forward Reaction and Reverse Reaction.
    • Define reversible reaction.
    • Define reversible and irreversible reactions.
    • Write down the names of two natural acids and their sources.
    • How conjugate acids and conjugate bases are formed?
    • Write physical properties of acids.
    • What is natural gas?
    • What is the importance of natural gas?
    • Which gas is dissolved in soda water drinks?
    • Write down the uses of Sodium Chlorate.
    • How detergents pollute water?
    • At which electrode chlorine is obtained in electrolysis of sodium chloride? Write equation.
    • Write any four uses of bases.
    • How sodium hydroxide is prepared commercially?
    • Describe limitations of Arrhenius concept of acids and bases.
    • All alkalies are bases but all bases are not alkalies. Explain why?
    • Define functional group and give one example.
    • What is Closed Chain? Write the name of its types.
    • What is meant by carboxyl functional group? Explain with an example.
    • Give two uses of Ethyne.
    • How we can prepare Ethyne by dehydrohalogenation of vicinal Dihalides?
    • What is difference between Oil and Ghee?
    • How oxygen is converted into ozone present in stratosphere? Give chemical reaction only.
    • Where Ozone is found?
    • How ozone layer is formed in the stratosphere?
    • Ozone is beneficial for human life Justify.
    • Write down the sources of oxides of carbon.
    • Give two serious effects of Ozone depletion.
    • What do you mean by water as solvent?
    • Write two unique properties of water that makes it a universal solvent.
    • Why is water considered a universal solvent?
    • What are Boiler Scales? How these are abolished?
    • Why pesticides are used?
    • What do you mean by boiler scale? How are they removed?
    • What is gangue?
    • Write the uses of Fuel Oil.
    • Define gangue and metallurgy.
    • Describe any two characteristics of acids.
    • Write physical properties of acid.
    • How is acid rain produced?
    • Why Fr ion acts as a Lewis acid?
    • Write the general formula of amino acid?
    • Why acid rain damages buildings?
    • What is difference between Lewis acid and Base?
    • Give difference between essential and non-essential amino acids.
    • How acid rain increases the acidity of soil?
    • What are limitations of Arrhenius concept?
    • Why BF3 behaves as Lewis acid?
    • What is meant by catenation?
    • What are alkynes? Give its general formula.
    • What is isomerism? Give an example.
    • Why Orchids produce alkanes?
    • How carbohydrates act as source of energy?
    • Define carbohydrates, write their general formula.
    • Describe the uses of carbohydrates.
    • Name any two sources of lipids and write their uses.
    • Write down two uses of lipids.
    • Write two uses of proteins.
    • What is the difference between biodegradable and non biodegradable substances?
    • How are proteins formed?
    • How can be protected by water borne diseases?
    • What are the reasons of water borne diseases?
    • What are water borne diseases of water?
    • How roasting is carried out?
    • Write the two chemical properties of water.
    • How NaHCO3 is converted to Na2CO3?
    • Which two generalizations can be made about direction of chemical reaction?
    • What is reduction reaction? Give chemical equation.
    • Write the chemical formulas of palmitic acid and stearic acid.
    • What are organic compounds?
    • What are inorganic compounds?
    • How organic compounds can be used as food?
    • Describe the combustion process with equation.
    • What is the difference between glucose and fructose?
    • Write the structure formulae of glucose and fructose.
    • How is CO considered a health hazard?
    • How do detergents affect the aquatic life?
    • Write down the disadvantages of detergents.
    • How atmospheric carbon dioxide and water react with bleaching powder?
    • Describe the physical properties of bleaching powder.
    • Write equations in which chlorine is sued as bleaching agent.
    • Write down the reactions of water and oxygen with ethane.
    • Describe Bromine Water Test.
    • Why colour of bromine water discharges on addition of ethane in it?
    • Write down two properties of water.
    • How chlorine reacts with water? Write equations.
    • Give any four physical properties of water.
    • What are the advantages of sterilized water?
    • How water rises in plants? OR How does lime stone dissolve in water?
    • Which raw materials are required in Solvay’s process?
    • Prove that water is an amphoteric specie.
    • Write two advantages of Solvay’s process.
    • Describe froth flotation process.
    • What is the principle of Solvay’s process?
    • What is the role of pine oil in the froth flotation process?
    • Write down two uses of ethene.
    • What are the major constituents of troposphere?
    • What do you mean by genetic code of life?
    • What are addition reactions? Give example.
    • How petroleum is formed?
    • Define petroleum.
    • Write the composition and uses of diesel oil.
    • What is meant by triglycerides? Write its general formula.
    • Which compounds are called Ketones?
    • Write the major sources of CO and CO2 emission.
    • What is principle of fractional distillation?
    • What is difference between hepatitis and jaundice?
    • Define minerals.
    • What do you mean by calcination?
    • What is difference between Minerals and Ores?
    • What is ether linkage?
    • Write down the uses of silicon dioxide.
    • What is a silicon chip?
    • How can hydrated silicon dioxide be obtained?
    • Explain the strength of covalent bonds of carbon.
    • Why does “silicon” occur in the form of silica and silicate?
    • Define polysaccharides and give one example.
    • What is meant by gravity separation?
    • Give the characteristics of polysaccharides.
    • Enlist the names of fractions of residual oil.
    • What are amorphous forms of carbon?
    • What is the difference between crude oil and residual oil?
    • Write the names of allotropic forms of carbon.
    • What is carbon black?
    • How can you test carbon dioxide?
    • Carbon belongs to which group and what is its valence?
    • What is arrangement of electrons in a sulphur atom?
    • What do you know about the structure of bucky balls?
    • What is the relationship between rhombic and monoclinic sulphur?
    • Describe the properties of rhombic sulphur.
    • Write down the uses of reaction of sulphur with copper.
    • What are indicatars? name any two indicators.
    • What are nucleic acids? Write names of two nucleic acids.
    • Define structural formula with an example.
    • State process of incineration.
    • Write uses of sulphuric acid.
    • Write uses of atmospheric gases in the manufacture of chemicals.
    • Why sulphuric acid is dibasic? Write down chemical reactions also.
    • What are heterocyck compounds? Give example.
    • Why sulphuric acid behaves as a dehydrating agent?
    • What is fluorosis?
    • What is the basic building unit of silica?
    • Give the balanced equation for the hydrolysis of sucrose.
    • What is olvine? Write its chemical formula.
    • Give names of different type of oxide.
    • Give two chemical properties of nitric acid.
    • What is hydration.

Short Question Answer

      • Reversiabe & Irreversiable reaction.
      • Chemical equilibrium.
      • Fotward & reversed reaction.
      • Law of mass action.

From exercise Chapter 9

      • Question # 4,7,8 & 13
      • Meaning of Acid & properties.
      • Mineral acids.
      • Source of Acids.
      • Ph.
      • Ph of water.
      • Universal indicator.
      • Salt & prop.
      • Neutrlization reaction.

From exercise Chapter 10

      • Question # 6,8,7,15 & 20
      • Vital force theory.
      • Aromatic compund.
      • Catenation.
      • Types of coal.
      • Distruvtive disti.
      • Petroleum.
      • Normal & iso propyl.

From exercise Chapter 11

      • Question # 2, 3, 5, 8 & 10.
      • Marsh gas.
      • Olifins.
      • Why bnanas are not kept with other fruits.

From exercise Chapter 12

      • Question # 1, 3, 10, 11, 16
      • Formula of Glucose.
      • Def of Carbohydrates.
      • Amino acid.
      • Fatty acids formulas.
      • Genetic code of life.
      • Types of vitamins.

Exercise of Chapter 13

      • Question # 2, 3, 5, 11, 12, 20.
      • Comp of atom.
      • Layers of Atom.
      • Types of Polutanta.
      • Effects of SO2.
      • CFCS.
      • Ozone hole.

Exercise of Chapter 14

      • Question # 2, 3, 9, 12
      • Prop of H2o.
      • Capilary action.
      • Flourosis.

Exercise of Chapter 15

    • Question # 1, 3, 6, 7 & 12
    • Gang.
    • Materlegy.
    • Anode Mud.
    • Raw materials of Solvay Process.
    • Fractional distil.
    • Fractions of crude.

10th Chemistry most important Questions

 

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