Amixture in which the suspended particles are too small to be seen with the naked eye is a
a) pure substance
b) colloid
c) heterogeneous mixture
d) salt solution

Option (B) is the correct answer.

Explanation:

A substance which cannot be separated by any physical means or whose molecules are consistently distributed throughout the sample is known as a pure substance.

For example, gold, water, carbon dioxide etc are all pure substances.

Whereas a substance whose particles are microscopically and evenly distributed throughout a solution or mixture is known as a colloid. In a colloid particles are very small that they cannot be seen with a naked eye.

For example, milk is a colloid.

A mixture in which particles are not evenly distributed throughout and are not uniform in composition is known as a heterogeneous mixture.

For example, sand in water is a heterogeneous mixture.

A salt solution is a solution that contains different compounds like sodium, potassium, calcium etc that helps in maintaining pH and osmotic pressure in a body.

Thus, we can conclude that a mixture in which the suspended particles are too small to be seen with the naked eye is a colloid.

air quality

poor drinking water

and heavy polution

can lead to poor health

explanation:

the largest database of organic compounds lists about 10 million substances, which include compounds originating from living organisms and those synthesized by chemists. the number of potential organic compounds has been estimated at 1060—an astronomically high number. the existence of so many organic molecules is a consequence of the ability of carbon atoms to form up to four strong bonds to other carbon atoms, resulting in chains and rings of many different sizes, shapes, and complexities. the simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons. even though they are composed of only two types of atoms, there is a wide variety of hydrocarbons because they may consist of varying lengths of chains, branched chains, and rings of carbon atoms, or combinations of these structures. in addition, hydrocarbons may differ in the types of carbon-carbon bonds present in their molecules. many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. we use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil. the familiar plastics polyethylene, polypropylene, and polystyrene are also hydrocarbons. we can distinguish several types of hydrocarbons by differences in the bonding between carbon atoms. this leads to differences in geometries and in the hybridization of the carbon orbitals.