Chemisrty for class 9 date 24/08

Properties composition and structure of matter is called ------------------

All matters derive from four elements --------------,-------------,---------------------- and ------------

The Muslim period was from 600 to 1600 A.D in the history of ---------------

it is deal laws and principles governing the combination of atom is called ------------------

It is the study of Carbon and hydrogen compounds is called -------------------

it is the method and techniques to determine kind quantity and quality of various component is called--------------

the study of different chemical processes involved in the chemical industries is called-----------

The study of changes occurring in the nuclei of atoms is called --------------------

The interaction of chemical materials and their effect on the environment is called ------------------

It is a basic tool to go forth elaboration a phenomenon is called -------------