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In 1774, Joseph Priestly showed that air contains oxygen gas Composition of Air USES OF AIR: Contamination of air by undesirable substances is known as Pollutants Methods to control Air Pollution: If Unable to download Click here Useful Links: CBSE CLASS 6 SOCIAL SCIENCE CBSE CLASS 6 SCIENCE CBSE CLASS…
Grade 8, Science Chemistry Define Combustion?? Difference between Combustible and Non combustible substances?? Combustible substances Non combustible substances Substances that burn easily in air to produce heat and light are called combustible substances Substances that do not burn in air are called Non combustible substances Ex: Cloth, Wooden stick, dry…