Question : a) List the physical properties of metals. b) Differentiate between roasting and calcination. Explain the two with the help of suitable chemical equations.

Question : a) List the physical properties of metals. b) Differentiat

1.	Question : a) List the physical properties of metals. b) Differentiate between roasting and calcination. Explain the two with the help of suitable chemical equations.
Answer» Solution :PHYSICAL properties of metals are : i) Metals are usually hard. ii) They are Sonorous, III) They are lustrus iv) Metals exhibit malleability and ductility v) They exhibit high tensil strength and have high densities: Roasting :It is a process in which SULPHIDE ore is heated in the PRESENCE of oxygen to convert into oxide `2Zns-3O to 2ZnO + 2SO_2` Calcination : It is a process in which carbonate ore in heated in the absence of air of form oxides. `ZnCO_(3(s)) overset("heat")to ZnO_((s)) + CO_2` By REDUCTION process Zn can be extracted from its ore. Reduction: `2ZnO+ C to ZnO + CO_2`