Question

3. Give a sample of immiscible liquids.. Why are they considered immiscible liquids?
4. Why do oil float on water?
5. What is the difference between filter funnel and separating funnel?​

Answer 1

3.liquids are said to be immiscible if they're completely insoluble in each other. Such a system actually consists of 2 phases, though it is usually referred to as a mixture. 

Examples include benzene and water, kerosene and water, etc.

4. Oil floats on water because it is less dense or has lower specific gravity.

5. Separatory funnels, or separation funnels, are a common fixture in chemistry labs. These funnels are used to separate immiscible liquids from their solutes. The funnel is usually glass, pear-shaped, and usually includes a stopper and a stopcock.

Filter funnels are filters that are used for solid-liquid separation by means of vacuum. Measure and filter substances in the laboratory with the Kimble™ Glass Funnel, an essential experimentation tool.