10 STD SSC Board

6. Chemical reaction
.
Hydrogen + oxygen ——> water
Hydrogen + chlorine ——> hydrogen chloride

7. Chemical Equation
The representation of chemical reaction in a
condensed form using chemical formulae is
called as the chemical equation.
2N2 + 3H2 ——> NH3
2Na + Cl2 ——> 2NaCl
Reactants Product

8. Types of
chemical
reactions
Combination
Displacement
Double
displacement

9. Combination Reaction
A + B AB

10. When two or more reactants combine in
a reactions to form a single product it is
called
C + O2. ——> CO2
CaO + H2O ——> Ca(OH)2
2N2 + 3H2 ——> NH3
2Na + Cl2 ——> 2NaCl

11. Decompostion reaction
AB A + B
CaCO3 (s) ---> CaO (s) + CO2 (g)

12. The chemical reaction in which two or more
products are formed from single reactant is
called
CaCO3 (s) ---> CaO (s) + CO2 (g)
C12 H22 O11 → 12 C + 11H2O
Digestion of food
Organic waste → biogas

14. Displacement reaction
AB + C AC + B

15. The reaction in which the ion of a less reactive element in
a compound is taken by another more reactive element
by formation of its own ions, is called
CuSO4(aq) + Fe (s) → FeSO4 + Cu
CuSO4(aq) + Pb(s) → _____ + _____

16. Double Displacement reaction
AB + CD AC + BD

17. The reaction in which the ions in the reactants are
exchanged to form a precipitate is called
K2CrO4 + BaSO4 ----------> BaCrO4 (Precipitate) + K2SO4
barium
chromate
Potassium
sulphate
barium
sulphate
NaOH + H2SO4 ----------> Na2SO4 + H2O