Which of the following processes is not a physical process of separation?
Hydraulic washing
Magnetic separation
Froth floatation
Leaching
Hydraulic washing, Magnetic separation, Froth floatation methods are physical processes of separation of ore articles and gangue particles. Hydraulic washing method depends upon the difference in the specific gravity of mineral and gangue.
Magnetic separation uses a magnet to physically separate magnetic material from non-magnetic.
Froth floatation is also a physical separation process of selective wetting of or particles using oil to make a foam-like material called Froth.
But leaching involves the treatment of the ore with a suitable chemical reagent to make the element into a soluble complex leaving gangue particles insoluble.
Study 40% syllabus and score up to 100% marks in JEE
5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K

A capacitor is made of two square plates each of side 'a' making a very small angle
A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A. The leftover organic phase was extracted with d