An ore like zinc blende is concentrated by

Froth-floatation method is successful in separating impurities from ores because

Which principle is involved in magnetic separation?

Which of the following ores is best concentrated by the froth-flotation method?

How do we separate two sulphide ores by the Froth Flotation Method? Explain with an example.

For the purification of alumina,the modern processes most useful when $(i)$ the impurity present is a lot of iron oxides and $(ii)$ the impurity present is a lot of silica,are: