CLASS 10 SCIENCE CHAPTER 1

2. A chemical equation is the symbolic
representation of a chemical reaction
in the form of symbols and formulae.

3. SKELETAL CHEMICAL EQUATIONS
OPPOSITE
BALANCED CHEMICAL EQUATIONS
WHY ?

4. • Count the atoms of each element in the
reactants and the products.
• Use coefficients; place them in front of
the compounds as needed.

6. A combination reaction (also
known as a synthesis reaction) is
a reaction where two or more
elements or compounds combine
to form a single compound
A decomposition reaction (also
known as analysis reaction) is a
type of chemical reaction in
which a single compound breaks
down into two or more elements
or new compounds.
OPPOSITE

7. Displacement reaction is a
chemical reaction in
which a more reactive
element displaces a less
reactive element from its
compound.
A double displacement
reaction, is a type of
chemical reaction where two
compounds react, and the
positive ions and the negative
ions of the two reactants
switch places, forming two
new compounds or products.

8. OXIDATION REDUCTION
GAINS OXYGEN OR
LOSES HYDROGEN
LOSES OXYGEN OR
GAINS HYDROGEN

9. CORROSION RANCIDITY