Explanation:
Mendeleev used atomic mass as basis. Anomalies like Ar (mass 40) placed before K (mass 39) occurred. These were resolved when Moseley proposed atomic number as the basis.
Explanation:
Acid rain is formed when sulfur dioxide (SO₂) and nitrogen oxides (NOx) emitted into the atmosphere (from burning fossil fuels) react with water, oxygen, and other chemicals to form sulfuric and nitric acids. These acids then fall to the ground as rain, damaging ecosystems.
Explanation:
Thermite process uses a mixture of aluminium powder and iron(III) oxide: Fe₂O₃ + 2Al → 2Fe + Al₂O₃ + heat. The reaction is highly exothermic, producing molten iron that is used to join railway tracks. Aluminium acts as a reducing agent. Copper, zinc, iron are not used as the reducing agent in this process.
No comments yet. Be the first to start the discussion!