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

a) List the physical properties of metals. b) Differentiate between r

1.	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`