In This Post You Can Download DAV Class 7 Science Chapter 3 CHEMICAL SUBSTANCES AND PROCESSES Solution.
Content Of Chemical Substances And Processes
Pure Substance: Material Made up of same Kind Of Particles ( Atoms Or Molecules). Example: Iron
Element :An Element is a Pure Substance Made up of Atoms Of Same Kind. Example: Cu , Al
Compound : It is a mixture Of 2 Or More Atoms . Example: Sulphuric Acid
Chemical Symbol: Chemical Symbols Are letters to Represent Elements .For example to Represent Iron Symbol is Fe.
Chemical Formula : A Chemical Formula Shows Composition of that Substance. For Example Chemical Formula for Carbon Dioxide is CO2.
In this Chapter You Will Also Learn about : Balancing of Chemical Equation.
Types of Chemical Reaction
Combination Reaction : When two or More Substances Combine to Form a new Substance.
Hydrogen And Oxygen Combine to form Water.
Decomposition Reaction : When a Substance Breaks and Forms two or More Substances .Example: Water Molecule gets Broken into Hydrogen And Oxygen.
Displacement Reaction : When One More Reactive Substance Displaces other less Reactive Substance in a Reaction.
Neuteralization Reaction : When Acid and BASE react to form salt and water.
PDF Of Chemical Substances And Processes
You Can Also Check
DAV CLASS 7 Science Chapter -1 Solutions PDF download
DAV CLASS 7 Science Chapter -2 Solutions PDF download
DAV Class 11 Physics SAMPLE Paper With Solutions PDF Download
DAV CLASS 11 PHYSICS previous YEAR Question Paper PDF Download
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