science class 10th chapter-Chemical Reaction and equation Formula & Important points
Jul 27, 2022, 16:45 IST
Difference between Physical change and Chemical change
|S.NO.||PHYSICAL CHANGE||S.NO.||CHEMICAL CHANGE|
Those changes in which no new substances
are formed are called physical changes
Those changes in which the original substances
lose their chemical nature and identity and form
new chemical substances with different
properties are called chemical changes
|(ii)||It is a temporary change||(ii)||It is a permanent change|
|(iii)||It is easily reversible||(iii)||It is usually irreversible|
In a physical change the mass of
substance does not alter
In a chemical change the mass of
the substance does alter
Types of Chemical Reactions:
- Addition or combination reactions: Two or more substances combine to form a single substance.
- Decomposition reaction: One chemical substance splits to give two or more substances either by heat energy (Thermolysis) or light (Photolysis) or by electricity (Electrolysis).
- Displacement Reaction: More reactive element displaces less reactive element from its compound or salt.
- Double Displacement Reaction: Two elements interchange their respective salts or ions to form new compounds.
Academic team of Physics Wallah prepared NCERT Solutions do solve all questions given in Exercise with the help of NCERT solutions for class 10 Science. If any students need to take the online test to check their concepts or understanding then they can visit Quiz for Chemical Reaction and Equation.
Download the Free Pdf sheet of Chemical Reaction and equation it consists of Short notes and key points of Chemistry for class 10 from the link given below.
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