know more about poisons

how to identify poisons in foods just by smelling?

It is not possible for a person with no previous exposure to the poisonous substance to accurately determine if there are any poisons present in food solely based on smell. The sense of smell can sometimes alert you to potential dangers, such as spoiled or rotten food, but it cannot reliably detect specific poisons without prior knowledge and training.

If someone were to ingest a poisoned food item that they identified through smell alone, they would still be at risk of serious harm or even death due to the presence of the poison. Therefore, it is essential to have proper education, training, and experience to identify potentially dangerous substances in food before consuming them.

what is the base of the most poisons?

There isn't one single chemical element or compound that serves as the "base" for all poisons. Poisons can come from many sources and take various forms, including organic (natural) and synthetic (man-made). Some common sources include metals, minerals, algae, fungi, bacteria, plants, and animals. Their mode of action differs; some poisons may work by interfering with enzymes, disrupting cellular function or damaging DNA. Because of their unique properties and structures, different poisons require unique antidotes and treatments when needed to prevent further damage.

what is the chemical of cyanide? 

Cyanide has the chemical formula CN−. It is a highly toxic compound that can interfere with cellular respiration, resulting in death within minutes if ingested or inhaled.

Cyanide forms salts known as cyanides and these occur naturally such as copper(II) cyanide ( CuCN ), potassium ferricyanide ( K3Fe(CN)6 ) which are used for electroplating and dyeing textiles respectively. Other cyanohydrins include methylamine hydrochloride and formic acid.[1] A cyano group (-CN) forms when one atom of carbon reacts with oxygen or nitrogen but other organic groups also feature this functional group which include aldehydes, ketones, amines and carboxylic acids. The term "cyanohydrin" usually refers to an organic molecule containing the -O-CN functional group.

It is found in trace amounts in nature in certain plants like apple seeds, apricot kernel or bitter almond. In low concentrations it's even released by some microorganisms. However, there have been cases where human activities caused large scale releases of cyanides into environment causing mass poisonings of animals and humans. [2][3] [4]

[1]: https://en.wikipedia.org/wiki/Organocyanide

[2]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5907841/

[3]: https://en.wikipedia.org/wiki/Hydrogen_cyanide#Use_in_chemical_warfare

[4]: https://pubchem.ncbi.nlm.nih.gov/compound/potassium-ferricyanide