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NEET Questions / Chemistry / Some Basic Concepts in Chemistry / Concentration Methods
Which of the following methods is NOT typically used for concentrating a dilute ore?
Froth flotation
Magnetic separation
Gravity separation
Distillation
In the leaching of alumina from bauxite, the concentration of the ore is achieved by:
Selective dissolution of alumina
Froth flotation
Magnetic separation
Electrolysis
Which method is employed for concentrating sulfide ores?
Froth flotation
Magnetic separation
Leaching
Gravity separation
Chromite ore is concentrated by:
Magnetic separation
Froth flotation
Leaching
Gravity separation
The process of removing gangue from ore is known as:
Concentration
Refining
Smelting
Roasting
Which of the following is used as a depressant in the froth flotation process for separating ZnS and PbS?
NaCN
Pine oil
Water
Xanthates
Which of the following methods is most suitable for separating a mixture of iodine and potassium chloride?
Sublimation
Distillation
Chromatography
Solvent Extraction
A mixture of sand, salt, and iron filings can be separated using a combination of methods. Which sequence is the most efficient?
Dissolution, filtration, evaporation, magnetic separation
Filtration, dissolution, evaporation, magnetic separation
Magnetic separation, dissolution, filtration, evaporation
Evaporation, filtration, dissolution, magnetic separation
Which technique is employed to separate two miscible liquids with a significant difference in their boiling points?
Simple distillation
Fractional distillation
Chromatography
Sublimation
In chromatography, the component that travels the furthest on the chromatogram is the one that is:
Most soluble in the mobile phase and least adsorbed to the stationary phase
Least soluble in the mobile phase and most adsorbed to the stationary phase
Equally soluble in both phases
Insoluble in both phases