I. Froth flotation is used to concentrate sulphide ores. II. Magnetic – InterviewSolution

1.	I. Froth flotation is used to concentrate sulphide ores. II. Magnetic separation is applicable for ferromegnatic ores. III Roasing method used to convert sulphide ores to oxides. IV. Magnetic separation is used to concentrate heavy oxide ores.
Answer» III & IV Only II Only I I, II & IV Answer :D

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