B. Fill in the blanks.
oxidation
1. Rusting is an example of ..
2. Galvanisation is a method of coating iron with a layer of
3. Coating iron with metals like copper, chromium, etc by passing current
4. Marble chips when treated with dilute hydrochloric acid give out
5. When carbon dioxide is passed through limewater, it turns milk
Solid carbon dioxide is called
Answers
1)Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.
2)Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting. The most common method is hot dip galvanizing, in which steel sections are submerged in a bath of molten zinc.
3) Sorry .....Don't know the Answer
4)to produce carbon dioxide gas.
5)Calcium hydroxide is sparingly soluble in water producing an alkaline solution known as limewater. When carbon dioxide gas is passed through or over limewater, it turns milky due to the formation of calcium carbonate.