Question

(a) Name the method used for removing gangue from sulphide ores

(b) How is wrought iron different from steel?

Answer 1

(a) Froth floatation method

(b) Wrought Iron is the purest form of iron & is prepared from cast iron. On the other hand, Steel is an alloy of iron. Steel possesses greater tensile strength than wrought iron.

Answer 2

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★Answer (a)

✔The method which is used for the removal of gangue from sulphide ore is froth flotation process.

✔In this process, a mixture of oil (pine oil) and water is made to froth in the tank which separates the sulphide ores.

★Answer (b)

✔Wrought iron is almost pure iron with around 0.02- 0.03% carbon whereas steel contains 0.15%-0.25% of carbon.

✔Wrought iron is a ductile material and resistant to corrosion whereas steel has more strength due to the more percent of carbon in it.