Saved Bookmarks
| 1. |
Define different types of chemical reaction and give example for each |
|
Answer» Chemical reactions can be classified in following types:\tCombination Reaction\tExample: When magnesium is burnt in air (oxygen), magnesium oxide is formed. In this reaction, magnesium is combined with oxygen.\tMg + O2 \xa0→2MgO\tMagnesium + Oxygen ⇨ Magnesium oxide\t\t\tDecomposition Reaction\tExample: When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide\tCaCO3 \xa0→ CaO + CO2\t\tDisplacement Reaction\tExample: When zinc reacts with hydrochloric acid, it gives hydrogen gas and zinc chloride.\tZn + 2HCl \xa0→ZnCl2 + H2\t\tDouble Displacement Reaction\tExample: When solution of barium chloride reacts with the solution of sodium sulphate, white precipitate of barium sulphate is formed along with sodium chloride.\tBaCl2 + Na2SO4 \xa0→ BaSO4 + 2NaCl\t\tOxidation and Reduction Reaction\tExample: When iron reacts with air, it forms iron oxide (rust)\t4Fe + 3O2 \xa0→ 2Fe2O3\t Chemical reaction is a change in chemicaleg:- rusting of iron |
|