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Choose the correct option.
Which of the following ores can be concentrated by froth floatation process:
- (1)Haematite
- (2)Calamine
- (3)Zinc blende
- (4)Bauxite
Answer
Answer
AICorrect option: (3)
Answer: (3) Zinc blende
Because sulphide ores such as zinc blende ($\mathrm{ZnS}$) are preferentially wetted by oil, they are concentrated by froth floatation.
From ISC 2018 Specimen Chemistry Paper 1, question 1(b)(iv).