13:24

Ion electron method # 4

16:45

Ion - electron method # 3

09:50

Ion electron method # 2

05:21

Ion-electron method # 1

21:15

Oxidising agent (oxidant) and Reducing agent (reductant)

10:42

Oxidation number # 2

10:39

Oxidation number

06:37

Some basic concepts of Chemistry ..2

03:14

Some basic concepts of Chemistry

05:07

# Q & A express

03:13

# Out of the world

05:14

Some Chemists and their discoveries

05:38

Introduction to Chemistry

02:50

Branches of Physics

03:41

Physics and its importance

03:56

Scientific Method

04:17

Science and its importance

03:14

Modes of transmission of communicable diseases

02:32

Disease and its types

01:48

Electromagnet

02:20

Magnetizing a magnetic materials

01:14

Temporary and Permanent magnets

02:49

Earth as a Magnet

04:01

Magnetic field and magnetic lines of force

05:39

Properties of Magnet

03:35

Types of Magnets

05:19

Ozone Depletion

02:11

Air - A mixture

04:24

Importances of Air

01:54

To show the presence of oxygen in the air

01:43

To show the presence of carbon dioxide in the air.

02:26

To show the presence of nitrogen in the Air

03:53

Properties of Air

04:55

Air and Atmosphere

03:13

Common Respiratory Diseases

02:08

Mechanism of Breathing

03:34

Organs of the Respiratory System

03:08

The Respiratory System

03:50

Eclipse

04:37

Shadow

03:29

Pinhole Camera

02:29

Application of Rectilinear Propagation of light

07:38

Light

07:27

Types of Simple Machines

05:09

Simple Machines

04:11

Water pollution

04:51

Prevention of Corrosion

04:23

Corrosion

04:12

Purification of water

04:36

Potable Water

07:09

Saturated Hydrocarbons

01:25

Chemical Tests (Part:2)

01:59

Chemical Tests (Part : 1)

06:36

Aliphatic Hydrocarbons

03:22

Hydrocarbons

01:52

Water as a universal solvent

04:42

Water Cycle

16:37

Reactivity Series and its characteristics

05:11

Words forever

04:05

States of Water