Arrange Cu, Ca, Na, Zn and Au on the basis of their decreasing reactivity.​

The decreasing order of chemical reactivity is given below.

(most active) Na > Ca > Mg > Zn > Fe > Cu (least active)

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne