Give an example for each of the following:
$(a)$ Solid-liquid homogeneous mixture
$(b)$ Gas-gas homogeneous mixture
$(c)$ Solid-solid homogeneous mixture
$(d)$ Solid-liquid heterogeneous mixture
$(e)$ Liquid-liquid heterogeneous mixture

(N/A) Salt solution ($NaCl$ in water) is a solid-liquid homogeneous mixture where salt dissolves completely in water.
$(b)$ Air is a gas-gas homogeneous mixture consisting of nitrogen,oxygen,argon,and other gases.
$(c)$ Alloys like brass (copper and zinc) or bronze (copper and tin) are solid-solid homogeneous mixtures.
$(d)$ Muddy water or chalk powder in water are examples of solid-liquid heterogeneous mixtures.
$(e)$ $A$ mixture of oil and water is a liquid-liquid heterogeneous mixture as they form separate layers.