Question

pls fast ..........




Give me full notes on chaper 1 chemical reaction and equations

Answer 1

❤Hi.... ✌✌

❤same pinch.... ☺☺.... As we both are in same grade.....

❤Here's ur answer ---------::::::

❤Chemical Reaction : Whenever a chemical change occurs we can say that a chemical reaction (permanent change) has taken place which can be expressed symbolically by a chemical equation.

❤✔e.g. Food gets digested in our body

❤✔Rusting of iron.
magnesium is burnt in air to form magnesium oxide. This chemical reaction can be represented as



❤We can observe or recognise a chemical reaction by observing change in state, colour, by evolution of gas or by change in temperature.
Physical state of the reactants and the products are mentioned to make chemical reaction more informative. e.g. we use (g) for gas, (l) for liquid, (s) for solid and (aq) for aqueous.
Balanced Equation : A balanced equation is one in which the number of atoms on the reactant and product sides are equal.


❤Balancing Equation : We balance a chemical equation so that no. of atoms of each element involved in the reaction remains the same at the reactant and product side.



❤Types of Reaction

❤✔I. Combination Reaction :– The reaction in which two or more substances combine to form a new single substance.
❤✔e.g.
slaked lime is used for white washing walls. It reacts with to form Calcium Carbonate and gives a shiny finish to the walls


❤✔Calcium Hydroxide Calcium Carbonate

❤✔(ii) Burning of Coal

heat+ light

❤✔(iii) Formation of water



❤Exothermic Reactions : Reaction in which heat is released along with the formation of products.



❤Endothermic Reaction :The reactions which require energy in form of heat, light or electricity are called endothermic reaction


❤✔. Decomposition Reactions :The reaction in which a single substance decomposes to give two or more substances. De composition reactions can be of three types:

❤✔DECOMPOSITION REACTIONS :-

,❤✨Thermal Decompostition :-When a decomposition reaction is carried out by heating...


❤III. Displacement Reaction:The chemical reaction in which an element displaces another element from its solution....

❤❤Hope it helps you.. ❤❤