Chemistry Podcast

Saturday, 25 July 2015

Maths 5th Class

5th Class Mathematics

Mathematics is very necessary in understanding chemistry very well, so we now publish some basics of mathematics from class 5th maths. Hope you like our work.
Multiplication:  operation to get no. of times of given no. eg- 5x5 = 25
Vedic trick of multiplication-
HCM (Highest Common Multiple) and LCM (Lowest Common Multiple) :

HCM: 5

LCM: 5x3x2x5x7=1050

Profit = selling price - cost price
Loss = cost price - selling price
Profit% = (profit x 100)/cost price
Loss% = (loss x 100)/cost price
Amount = principle + interest
Simple Interest = principle x rate% x time
Simple Interest = (principle x rate x time)/100
AM = antemeridian
PM = postmeridian
Big Units
Small Units
Kilo = 1000 times
Deci = 1/10
Hecto = 100 times
Centi  = 1/100
Deco = 10 times
Mili = 1/1000
Perimeter of Triangle = sum of lengths of all three sides of triangle.
Perimeter of Rectangle = 2 (Length + Breadth)
Perimeter of Square = 4 x ( Length of any one side)
Area of Rectangle = Length x Breadth
Area of Square = Side x Side
Different Angles used in Mathematics:
  • Acute Angle < 90o
  • Right Angle = 90o
  • 90o < Obtuse Angle < 180o
  • Zero Angle = 0o
  • Straight Angle = 180o
Different Triangles used in Mathematics:
  • Right Triangle = Triangle containing one 90o angle
  • Equilateral Triangle = Triangle having three equal sides and three equal angles, and have each angle of 60°.
  • Isosceles Triangle = Triangle having two equal sides and two equal angles.
  • Scalene Triangle = triangle having different length of sides.
  • Acute Triangle = Triangle having all three angles less than 90o
  • Obtuse Triangle = Triangle having one angle more than 90o

Friday, 24 July 2015

what is chemical and what is chemical reaction


Chemical-any substance that has a defined composition
Chemical reaction- the process by which one or more substances change to produce one or more different substances
States of matter-the physical forms of matters, which are solid, liquid, gas, and plasma 
Reactant- a substance or molecule that participates in a chemical reaction  Product- a substance that forms in a chemical reaction
Matter-anything that has mass and takes up space
Volume-a measure of the size of a body or region in three-dimensional space
Mass-a measure of the amount of matter in an object; a fundamental property of an object that is not affected by the forces that act on the object, such as the gravitational force
Weight- a measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe
Quantity- something that has magnitude, size, or amount
Unit- a quantity adopted as a standard of measurement
Conversion Factor- a ration that is derived form the equality of two different units that can be used to convert from one unit to the other
Physical property- a characteristic of a substance that does not involve a chemical change, such as density, color, or hardness
Density –the ratio of the mass of a substance to the volume of the substance; often expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases
Chemical Property- a property of matter that describes a substance’s ability to participate in chemical reactions
Atom- the smallest unit of an element that maintains the properties of that element
Pure Substance- a sample of matter, either a single element or compound, that has definite chemical and physical properties
Element- a substance that cannot be separated or broken down into simpler substances by chemical means’ all atoms of an element have the same atomic number
Molecule- the smallest unit of a substance that keeps all of the physical and chemical properties of that substance; it can consist of one atom or two or more atoms bonded together
Compound- a substance made up of atoms of two or more different elements joined by chemical bonds
Mixture- a combination of two or more substances that are not chemically combined
Homogeneous- describes something that has a uniform structure or composition throughout
Heterogeneous- composed of dissimilar components
by: Chemistry Notes Info www.ChemistryNotesInfo.Blogspot.Com

Wednesday, 22 July 2015

Chemical Reactions and Chemical Formula

Chemical Reactions

 Chemistry AppsChemical Reaction is the reaction in which two or more than two substances react to form a new substance is known as Chemical Reaction. The substances which react may be ion or compound of element.
Reaction: Reactant reacts with each other to give product.
               Reactant   -------->  Product
Example of general chemical reactions from daily life is rusting of iron, formation of curd from milk etc.

Chemical Formula

                               Chemical Formula is simple representation of any compound by writing together the numbers and symbols of constituting elements forming that compound.
Example: H2O, CaCl2, AlCl3, Ca(OH)2

Chemical Formula for Ionic Compounds

                                                     As we know Ionic compound formed as a result of electron transfer between metal and non-metal atoms. When we have to write chemical formula for ionic compound then write metal atom symbol on left hand side and non-metal atom symbol on right hand side. Metal atom name remain same but ‘ide’ or ‘ate’suffix is added to non-metal atom name.

Ionic compound formed by one metal atom and non-metal atoms.

Metal Atom
Non-Metal Atom
Name of Compound
Chemical Formula  of Compound
Name and Symbol
Name and Symbol
Calcium (Ca)
Oxygen (O)
Calcium Oxide
Magnesium (Mg)
Chlorine (Cl)
Magnesium Chloride
Aluminium (Al)
Chlorine (Cl)
Aluminium Chloride

    Chemical Formula for Covalent Compounds

                                                                        As we know covalent compound formed as a result of electron sharing and contains non-metal atoms. When we have to write chemical formula for covalent compound then relatively less electronegative non-metal atom symbol is written on left hand side and other witch is more electronegative is written  on right hand side. Name of non-metal atom which is written on left hand side is remain same but ‘ide’ suffix is added to non-metal atom name which is written on right hand side. 

Covalent compound formed by two  non-metal atoms.

Low Electronegative Non-Metal Atom
High Electronegative Non-Metal Atom
Chemical Name of Compound
Chemical Formula  of Compound
Name and Symbol
Name and Symbol
Carbon (C)
Oxygen (O)
Carbon Mono Oxide
Carbon (C)
Oxygen (O)
Carbon Di Oxide
Phosphorus (P)
Chlorine (Cl)
Phosphorus Tri Chloride
Phosphorus (P)
Chlorine (Cl)
Phosphorus Penta Chloride
Nitrogen (N)
Oxygen (O)
Nitrogen Penta Oxide


Monday, 20 July 2015

Important Chemistry Polymers with their Monomer, Formula and Uses

Important Polymer Table

Important Polymers with their Monomer, Formula and Uses.

Monomer Formula
1.    Teflon
Oil seals, Gasket
2.    Polyacrylonitrile
Commercial Fibers
3.    Terylene or Decron
Ethylene Glycol
Teryphthalic Acid

Commercial Fibers
4.    Nylon 6,6
5.    Nylon 6
Adipic Acid
Making Sheets, bristles of brushes, textile industry, tyre cords, fabrics, ropes etc.
6.    Phenol Formaldehyde Polymer
i.                   Novolac
Phenol + Formaldehyde
Used in paints
ii.                 Bakelite
Phenol + Formaldehyde

Comb, Electric switches
7.    Malamine Formaldehyde Polymer
Malamine + Formaldehyde

Unbreakable crockery
8.    Buna S
1,3-Butadiene + Styrene

Auto tyres, cables insulation, floor tiles


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