The noun 'chemistry' is used in two ways.
1. When the word chemistry is used with reference to the general field of scientific study of substances, it is a 'mass' noun, and is therefore uncountable [Ref: Wiktionary: chemistry(1)] and does not have a plural form.
2. The word chemistry is also used to refer to 'the application of chemical theory and method to a particular substance' - Ref: Wictionary: chemistry(2)
In this sense the noun is countable, and the plural form is chemistries.
Example sentence: The surface chemistries of hydrophobic aerogel and hydrophilic aerogel differ.
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Chemistry.
Inorganic chemistry is a branch of chemistry that focuses on the properties and behavior of inorganic compounds, while general chemistry covers all basic principles and concepts of chemistry, including inorganic chemistry. General chemistry is a broader discipline that encompasses various branches of chemistry, including inorganic chemistry.
Analytical Chemistry is the study of composition of matter. It is the branch of chemistry that deals with properties of materials and analysis of them with the help of tools.
Examples: - inorganic chemistry - organic chemistry - electrochemistry - foods chemistry
Anorganic chemistry, organic chemistry, physical chemistry, electrochemistry, photochemistry, radiochemistry, biochemistry, agrochemistry, clinical chemistry, mecanochemistry, cosmochemistry, geochemistry, hydrochemistry, nuclear chemistry, forensic chemistry, etc.