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You are now in the lesson trial page where you can try out selected lessons. All lessons will be made available upon subscription. All Courses Secondary 4 Pure Chemistry. Contents Metals Chapter 1. Metals, physical properties of metals. Reactivity series, reactions of metals with water, steam and acid. Reactions of alkali metals with cold water.

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Reactions of metals with steam. Reactions of metals with dilute acids. MCQ: What is the unknown metal, X? Worksheet PDF. Answer PDF. Chapter 2. Displacement of metals. Using displacement reactions to arrange metals according to reactivity. Reactivity of a metal according to ease of thermal decomposition of its carbonate. Extraction of metals using electrolysis, reduction by carbon or hydrogen.

Different types of steel, extraction of iron from haematite. Process of iron extraction using a blast furnace. Structured Q: Will iron be extracted from its ore if magnesium oxide and coal are used Rusting and methods of rust prevention.

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MCQ: In which test tube will rusting occur the fastest, and others. Periodic Table.

Chapter 3. Periodic table: groups and periods. MCQ: Changes in properties of elements across a period, down a group. Group 1 elements alkali metals. MCQ: Write the names and formulae of the products formed when rubidium reacts with water, and others. Group VII elements halogens. Group 0 elements noble gases. Chapter 4. Transition metals. Structured Q: Describe and explain what you will observe when fluorine is bubbled Structured Q: The table shows some properties of Group I Chapter 5.

Electrolysis: Schematic of an electrolytic cell. Electrical conductivity of electrolytes and electrodes. Roles of cathode and anode in redox reactions. Constructing electrolysis equations. Constructing redox equations for the electrolysis of water. Comparing differences in electrolysis of molten, concentrated and diluted salt solutions.

Class 10 Biology

Chapter 6. Electrode gas ratio. Purification of copper using active electrodes. Electroplating of an object with silver using active electrodes. Simple cells. Purpose of a salt bridge.

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MCQ: In which instance is there no change in concentration Structured Q: An electric cell X has copper and silver electrodes Structured Q: Suggest reason for heat source, identify electrode material, anode Structured Q: The electrolysis of concentrated aqueous sodium chloride Structured Q: An electrolyte set-up using inert electrodes Chapter 7.

Structured Q: Electrolysis of sodium chloride solution. Structured Q: Simple electrochemical cell.

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Application Q: Electro-refining is the final stage in producing highly purified copper Application Q: Electrolysis can be used to remove unwanted hair Structured Q: Two electrochemical cells. Application Q: Chlorine and sodium hydroxide are manufactured by the electrolysis Structured Q: The electrolysis of three different solutions using inert electrodes Energy Changes.

Chapter 8. Endothermic and Exothermic Reactions. Bonds broken or bonds formed.

Class 10 Physics

Practice Questions on Endothermic and Exothermic Reactions. Enthalpy change in a reaction. Practice Questions on Enthalpy change in a reaction. Energy Level Diagrams and Practice Questions. Chapter 9. Determining activation energy and enthalpy change. Catalysts and their effect on activation energy. Determining enthalpy change using bond energy values. MCQ: What is the enthalpy change of the decomposition of Structured Q: The decomposition of hydrogen peroxide Structured Q: Fuel cells produce electrical energy Application Q: Instant cooling packs, which are used to treat sports injuries Speed of Reaction.

Chapter Methods to determine speed of reaction, collision theory. Factors affecting the speed of reaction. MCQ: Which solution would give the fastest initial rate of reaction Structured Q: A student investigated the time taken for an antacid tablet to react Structured Q: A sample of 1. Ammonia and sulfur dioxide. Effect of temperature and pressure on yield of ammonia. MCQ: What are the operating conditions in the Haber process Structured Q: Name the catalyst used in the Haber process and explain Structured Q: Explain, using collision theory, why increasing pressure will increase yield Structured Q: Ammonia is made by reacting Application Q: One of the uses of ammonia is to make fertilisers The Atmosphere and Environment.

Composition of air. Carbon monoxide, effects on human health. Unburnt hydrocarbons and methane. Depletion of ozone layer, carbon cycle, greenhouse effect, global warming.

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Structured Q: The table shows the composition of the atmosphere on the planet Mars Application Q: Most vehicles have petrol or diesel engine, but Reducing air pollution - catalytic converters and flue gas desulfurisation. MCQ: Which method s can be used to reduce carbon dioxide emissions MCQ: The diagram shows a section of a catalytic converter Structured Q: The table below gives information about car exhaust emissions Structured Q: In the combustion engine, nitrogen and oxygen react Structured Q: Emissions from power stations contain sulfur dioxide Basically, science subject needs all three - sharp mind logical , good memory power to learn and remember the topics and stamina for studying long hours , especially the Chemistry subject demands repeated readings of the textbooks and notes.

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