Chemisrty for class 9 date 24/08

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

(a)  

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

(a)  

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

(a)  

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

(a)  

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

(a)  

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

(a)  

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

(a)  

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

(a)  

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

(a)  

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

(a)