Please help me to solve these out Share with your friends Share 0 Chirag Gupta answered this Dear Student7. (B) Metallic oxides are basic in nature, e.g., MgO, CaO.8. (A) A tomato contains more than 10 different types of acids, but acid present in large percentage: citric acid and malic acid.9. (B) By using NaOH. When NaOH reacts with iron (II) chloride, it forms a dirty green precipitate whereas when NaOH reacts with iron (III) chloride, it forms a reddish brown precipitate.10. (B) In roasting, ore is heated in the presence of excess of oxygen or air. This method is employed for sulphide ores.11. (B) Bronze is an alloy of copper and tin.12. (D) All the three methods given are used to prevent corrosion.13. (D) CCl4 is a covalent compound.14. (C) Copper metal when exposed to air turns green in colour due to corrosion. When copper vessel is exposed to air, it forms a mixture of copper carbonate and copper hydroxide. 15. ( A) Coper has the most free electrons.16. (D) In an electrolyte, the movement of ions is responsible for electric current.Regards 0 View Full Answer
