Question

The solid particles which remain on the filter paper after the filtration ___________________.

Answer 1

Hint: Here you need to think about the filtration process and the terms used in it like filtrate, residue and filter medium. It's a term given to the matter which is left out on the filter paper after the process of filtration.

Step by step answer: Filtration is a process used to separate solids from liquids or gases using a filter medium that allows fluid to pass through the filter paper but not the solid. Solid particles that do not pass through the filter medium are because they are oversize and the fluid that passes through is called filtrate. The solid particles which remain on the filter paper after the filtration is called Residue.

Additional Information: There are various other terms used in the filtration process. Oversized particles form a filter cake on top of the filter and may block the filter lattice preventing the fluid phase from crossing the filter is known as binding. The size of the largest particles that can successfully pass through a filter is called the effective pore size of that filter. Some examples of filtration used in daily life are brewing tea where it is passed through a filter where lea leaves become the residue and the liquid tea is the filtrate. Even air conditioners and many vacuum cleaners use HEPA filters to remove dust and pollen from the air. Also, many aquariums use filters containing fibres that capture particulates.


Note: The residue can be of different shapes and sizes and also of different colours. And therefore binding and effective pore sizes are different for different compounds.Some call it as precipitate which is not technically the correct term for the residue.