Chemistry and Biology Assignments Chemistry and Biology Assignments Assignment 1. MCQ: Chemical Reactions and Equations Q1. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to: Answer: b. Remove the layer of magnesium oxide from the ribbon surface Reasoning: Magnesium ribbon is cleaned with sandpaper to remove the oxide …
Chemical Reactions Reactions Action of water on quick lime: CaO + H2O → Ca(OH)2 Action of heat on ferrous sulphate crystals: 2FeSO4 → Fe2O3 + SO2 + SO3 Iron nails kept in copper sulphate solution: Fe + CuSO4 → FeSO4 + Cu Reaction between sodium sulphate and barium chloride solutions: Na2SO4 + BaCl2 → BaSO4 …
Chemistry and Biology Assignments Chemistry and Biology Assignments Assignment 1. MCQ: Chemical Reactions and Equations Q1. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to: a. Make the ribbon surface shinier b. Remove the layer of magnesium oxide from the ribbon surface c. Remove the layer of magnesium …
