Which chemicals are used in refrigrators, air conditioners, perfumes etc?

Which chemicals are used in fire extinguishers?

Freons, chlorofluoro compounds of methane and ethane are stable, low boiling, non-toxic, non-inflammable and non-reactive compounds. These are extensively used in refrigerators and air conditioners. These are also used as propellants for aerosols and foams to spray out deodorants, cleansers, shaving creams and hair sprays. However, its use has been discouraged and restricted in some countries. As a student of science, What is freon-12? How is it prepared?

Freons, chlorofluoro compounds of methane and ethane are stable, low boiling, non-toxic, non-inflammable and non-reactive compounds. These are extensively used in refrigerators and air conditioners. These are also used as propellants for aerosols and foams to spray out deodorants, cleansers, shaving creams and hair sprays. However, its use has been discouraged and restricted in some countries. As a student of science, What values are associated with this decision ?

Which chemical is used for testing Starch in Food?

Which chemical is used to strain plant cell ?

The chemical mixture used to form lithopone is-

The chemical used in National Malaria Eradication Programme is

The chemical mixture use for the formation of ammonal is-

The chemical test that is used for diagnosis if typhoid is: