SOLUTION AND SOLUBILITYWhen some salt is added to water and stirred, the salt disappears. This is because the salt has dissolved in the water. Dissolving is a change where substances mix completely with the liquid they have been added to. Not all substan…

Physical Properties Of Metals And NonmetalsDifferent elements have different properties. These properties can make these elements suitable for various purposes. Elements can be classified into two broad categories: metals and non-metals. Aluminium and m…

Justify the uses of synthetic polymers in daily lifeSynthetic polymers in daily life:Synthetic polymers have been widely used to replace many other building materials such as stones, metals, wood, clay, cotton, wool and natural rubber.Synthetic polymers…

How is a composite material made? The need to produce new materials: Ancient human beings used clay, wood, stone, glass or metal as building materials. These materials have limitations; they corrode or rot easily, are heavy, bulky or difficult to shape o…

USES OF METALS AND NON-METALSUses of some common metals and non-metals are as follows.Metals  Iron is used for making automobiles, machinery, pipes, containers, nails, etc. Gold and silver are used for making jewellery. Copper is used for making electric…

Chemical Properties Of Metals And NonmetalsChemical properties of metals and non-metals can be divided into five categories: reaction with oxygen, reaction with water, reaction with acids, reaction with bases, and displacement reactions.Reaction with Ox…

Binding of Carbon with other ElementsWe have understood that the compounds of carbon and hydrogen are called hydrocarbons. Practical observations reveal that carbon forms compounds not only with atoms of hydrogen but also with atoms of other elements li…

What is meant by Colloidal SolutionColloids : A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions. The size of solute particles in a colloids is bigger than that …

Fire extinguisher The reaction between sulphuric acid and sodium carbonate or sodium hydrogencarbonate is utilized in the making of fire extinguisher as shown in Figure. A sealed glass bottle filled with dilute sulphuric acid is kept inside a container f…

Balancing of Chemical Equations :Balancing : The process of making atoms of various elements equal in an equation on either side is called balancing.Balancing an Equation The first step in balancing an equation is to count the number of atoms of each el…