What Is Chemistry

Definition of Chemistry ?

It is the branch of science which deals with the study of composition, properties and interaction of matter.
Now you may have question or queries related to matter like.....

What Is Matter ?

Anything which has mass and occupies space known as matter. Ex:- Water, pencil, pen, book etc.

Physical states of matter

=> Solid, liquid, gas.

Physical state	Definite volume	Definite shape	Example
Solid	Yes	Yes	Book, pen
Liquid	Yes	No	Water, milk
Gas	No	No	CO2, Air

Temperature & pressure effect on physical state

What are basic constituents of matter ?

Basic constituents of matter are atoms and molecules.

Note:- But in movies and serials or general discussion you heard about chemistry that chemistry is "the complex psychological or emotional interaction between people."

Branches of Chemistry ?

These are some of general and important branches of chemistry-
Physical Chemistry
Organic Chemistry
Inorganic Chemistry
Nuclear Chemistry
Analytical Chemistry
Wet Chemistry

P

Bio Chemistry 

Other Fields of Chemistry like- 

• Agrochemistry
• Atmospheric chemistry
• Chemical engineering
• Chemical biology
• Chemistry education
• Chemo-informatics
• Flow chemistry
• Immunohistochemistry
• History of chemistry
• Immunochemistry
• Chemical oceanography
• Materials science
• Mathematical chemistry
• Mechanochemistry
• Molecular biology
• Molecular mechanics
• Nanotechnology
• Oenology
• Organometallic chemistry
• Petrochemistry
• Pharmacology
• Pharmaceuticals
• Phytochemistry
• Radiochemistry
• Sonochemistry
• Synthetic chemistry
• Astrochemistry  
• Cosmochemistry 
• Computational chemistry
• Environmental chemistry
• Green chemistry
• Supramolecular chemistry
• Theoretical chemistry
• Bioinorganic chemistry
• Cluster chemistry
• Materials chemistry
• Biochemistry 
• Neurochemistry
• Bioorganic chemistry
• Medicinal chemistry
• Organometallic chemistry
• Pharmacy
• Physical organic chemistry
• Polymer chemistry
• Chemical kinetics
• Chemical physics
• Electrochemistry
• Femtochemistry 
• Geochemistry
• Photochemistry
• Quantum chemistry
• Solid-state chemistry
• Spectroscopy
• Stereochemistry
• Surface science
• Thermochemistry 
• Calorimetry 

what is chemistry