Fe2o3 (s) + 3 co (g) → 2 fe (s) + 3 co2 (g) type of reaction

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.