Question

what are separate technique in a. mercury and water and potassium chloride and ammonium chloride​

Answer 1

Mercury and water are separated by decantation by using separating funnel as the separation of two immiscible liquids by a separating funnel depends on the difference in their densities. Mercury is heavier than water therefore, forms the lower layer and separated from water.

The method used to separate potassium chloride and ammonium chloride is "Sublimation".