CBSE Class 10 Chemical Reaction And Equations Notes For SA 1 2016-17

By

1)Chemical reaction— Chemical changes or chemical reactions are the changes in
which one or more new substances are formed.

2)Chemical Equations– Representation of a chemical reaction in terms of symbols and
formulae of the reactants and products is known as chemical equation.

3)Balanced Chemical equations– The chemical equation in which the no. of atoms of different 
elements is same on both sides of the arrow is called balanced chemical equation.

4)The chemical reactions can be classified into different types such as—

a) Combination reaction– The reactions in which two or more substances combine to
form a new substance are called combination reaction. For example,

                                                 2Mg(s) + O2(g)  2 MgO (s)

b) Decomposition reaction- The reaction in which a single compound breaks up into
two or more simpler substances are called decomposition reactions. For example,
                          2Pb (NO3)2(s) 2PbO (s) + 4NO2(g) +O2(g)

The decomposition of a substance by passing electric current through it is known as 
electrolysis (Electrical Decomposition).

The decomposition of a substance on heating is known as thermal decomposition.

The decomposition of a substance by absorbing light energy is called photochemical 
decomposition.

c) Displacement reactions-The chemical reactions in which a more reactive element
displaces a less reactive element from a compound are known as displacement
reactions. For example,
                 i) Zn (s) + CuSO4 (aq)  ZnSO4(aq) + Cu (s).
                ii) Cu (s) + 2AgNO3(aq) Cu (NO3)2 (aq) +2Ag (s).

d) Double Displacement Reactions- The chemical reactions in which compounds react
to form two different compounds by mutual exchange of ions are called double
displacement reactions.

These reactions take place in solution two common types of this reaction are 
precipitation reactions and neutralization reactions
                 
i) Precipitation reaction :In this reactions, aqueous solution of two salts are mixed
whereby
Some salts precipitate due to mutual exchange of ions between the two salts. For example
             AgNO3(aq) + NaCI (aq) -----> AgCl(s) + NaNO3.

ii) Neutralization reaction:In this type of reaction an acid reacts with a base to form
salt and water by exchange of ions.
               NaOH (aq) + HCl (aq) NaCl (aq) + H2O.

e) Redox reaction:Chemical reaction which shows both oxidation and reduction
reaction.

Oxidation:Reaction that involves the gain of oxygen or loss of hydrogen.
Reduction:Reaction that shows the loss of oxygen or gain of hydrogen.

Both oxidation and reduction take place simultaneously and hence called redox reaction.
                                         ZnO + C Zn +CO

                                ZnO reduce to Zn ---- reduction
                                C oxidize to CO ------oxidation

f)Exothermic reaction and endothermic reaction:On the basis of energy changes during
chemical
reaction, they can be classified as
i) Exothermic reaction:A chemical reaction in which heat energy is produced.
                                                  C + O2CO2(g) + heat
ii) Endothermic reaction:A chemical reaction in which heat energy is absorbed.
                                              CaCO3+ Heat CaO + CO2

5 Corrosion –The process of slow conversion of metals into their undesirable compounds due
to their reaction with oxygen, water, acids, gases etc. present in the atmosphere is called
corrosion.

Rusting – Iron when reacts with oxygen and moisture forms red substance called rust. Chemical 
composition of rust is Fe2O3.xH2O. Its chemical name is Hydrated Iron (III) oxide.

6 Rancidity –The taste and odour of food materials containing fat and oil changes when they
are left exposed to air for long time. This is called rancidity. It is caused due to oxidation of fat
and oil present in food material.

chemical reactions and equations software free download
chemical reactions and equations used in daily life
chemical reactions and equations extra questions
chemical reactions and equations examples
chemical reactions and equations experiment
chemical reactions and equations in everyday life
chemical reactions and equations class 10 exercise solutions
chemical reactions and equations class 10 extra questions answers
chemical reactions and equations class 10 exam fear
chemical reactions and equations class 10 explanation
chemical reactions and equations for class 10
chemical reactions and equations for class 8
chemical reactions and equations for class 7
chemical reactions and equations notes for class 10
chemical reaction equation for photosynthesis
chemical reaction equation for cellular respiration
chemical reaction equation for rusting of iron
chemical reaction equation for a burning candle
chemical reaction equation for respiration
chemical reactions and equations grade 10
chemical reactions and equations gradestack
chemical reactions and equations games
chemical reactions and equations study guide
chemical reaction equation generator
chemical reactions and equations class 10 ppt google
chemical reaction equation for glow sticks
chemical reactions and equations glencoe
chemical reactions and equations hots
chemical reactions and equations hindi me
chemical reactions and equations hots questions
chemical reactions and equations in hindi
chemical reactions and equations class 10 hots
chemical reactions and equations class 10 hots questions
chemical reactions and equations worksheet mcgraw hill
chemical reaction heat equation
chemical reactions and equations class 10 in hindi
chemical reaction and equation important question
chemical reactions and equations in our surroundings
chemical reactions and equations introduction
chemical reaction equation in fireworks
chemical reactions and equations class 10 important questions
chemical reactions and equations class 10 important questions answers
chemical reactions and equations khan academy
chemical reactions and equations in kitchen
chemical reaction equations ks3
chemical reaction word equations ks3
chemical reaction kinetics equations
chemical reactions and equations lab report
chemical reactions and equations lab 10
chemical reactions and equations lab timberlake
chemical reactions and equations learn next
chemical reactions and equations lesson plan
chemical reactions and equations list
chemical reaction equations latex
chemical reactions and equations ncert solutions
chemical reactions and equations ncert
chemical reactions and equations notes pdf
chemical reactions and equations ncert answers
chemical reaction and equation class 10 notes
chemical reaction and equation important notes
chemical reaction and equation of class 10
chemical reactions and equations online test
chemical reactions and equations online
chemical reactions and equations of class 10th
chemical reaction equation of photosynthesis
chemical reaction equation of cellular respiration
chemical reaction equation of rust
chemical reaction and equations pdf
chemical reactions and equations practice
chemical reactions and equations powerpoint presentation
chemical reactions and equations powerpoint
chemical reactions and equations project
chemical reactions and equations packet
chemical reaction and equations questions
chemical reactions and equations quiz
chemical reactions and equations question paper
chemical reactions and equations quizlet
chemical reactions and equations mcq questions
chemical reactions and equations sample questions
chemical reactions and equations review
chemical reactions and equations report sheet
chemical reaction equation rust
chemical reactions and equations chapter 6 reviewing vocabulary
chemical reaction rate equation
chemistry reaction rate equation
chemical reactions and equations solutions
chemical reactions and equations summary
chemical reactions and equations software
chemical reactions and equations sample pap


It can be prevented by using various methods such as by adding antioxidants to the food 
materials. Storing food in air tight container and by flushing out air with nitrogen.

0 comments:

Post a Comment