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
(i)	Those changes in which no new substances are formed are called physical changes	(i)	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
(iv)	In a physical change the mass of substance does not alter	(iv)	In a chemical change the mass of the substance does alter

chemical reaction

Addition or combination reactions: Two or more substances combine to form a single substance.

CaO+Co₂→CaCO₃

Decomposition reaction: One chemical substance splits to give two or more substances either by heat energy (Thermolysis) or light (Photolysis) or by electricity (Electrolysis).

thermolysis

electrolysis

2AgCl→2Ag+Cl₂

Displacement Reaction: More reactive element displaces less reactive element from its compound or salt.

Fe+CuSO₄→FeSO₄+Cu

Double Displacement Reaction: Two elements interchange their respective salts or ions to form new compounds.

FeCl₃+CuSO₄→FeSO₄+CuCl₂

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.