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IGCSE / O Level Chemistry Revision Notes

The Particulate Nature Of Matter

The-Particulate-Nature-Of-Matter

Matter: Matter is any substance that has mass and occupies space.                                                                               …

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Acids

ACIDS

Acids: An acid is a substance, which forms H+ ions. When dissolved in water, they can conduct electricity. E.g. HClH+     +    Cl – Get O/A Levels & IGCSE Solved Topical Past Papers, Notes & Books << SHOP Now >> 🚚 Delivering all over PAKISTAN 🇵🇰 & ✈️ Internationally 🌐 CALL …

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Bases

Bases

Bases: Bases are metal oxides and metal Hydroxides. A base is a a substance, that can accept H+ ions and therefore are proton acceptor. Example: Copper(II) Oxide (CuO) Iron(III) Oxide (Fe2O3) Copper (II) Hydroxide (Cu(OH)2) Iron (III) Hydroxide (Fe2O3) It reacts with an acid to give salt and water only. …

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IGCSE / O Level Economics Revision Notes

Basic Economic Problem

Basic Economic Problem

Basic Economic Problem: The basic economic problem is that there are finite resources and unlimited wants; in other words there are unlimited human wants, and resources which are used to make those goods are limited. Get O/A Levels & IGCSE Solved Topical Past Papers, Notes & Books << SHOP Now …

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Production Possibility Curve

Production Possibility Curve: The following is a curve representing all possible combinations of two goods that can be produced by an economy where all of its resources are fully and efficiently employed. Point X: The economy can exist at this point but it is being inefficient. Point X Is considered …

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Allocation Of Resources In Economic Systems

Resource Allocation Answers Three Questions: What to produce? How to produce? For whom to produce? Economic Systems: How an economy decides, how to allocate its resources is its economic system. There are three kinds of economic systems: Free Market Economy Planned Economy Mixed Economic System   Free Market Economy: It is …

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IGCSE / O Level Mathematics Revision Notes

Number

Natural Numbers: The natural numbers include whole numbers except 0. E.g. 1,2,3,4,5,6… Integers: Positive natural …

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Matrices

In Mathematics, matrices are arrays of numbers arranged in rows and columns. Types of Matrices: …

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IGCSE / O Level Physics Revision Notes

IGCSE / O Level Islamaiyat Revision Notes