Of the following modern day arab states, which was allowed representation at the paris conference in 1919?
a. iraq
b. syria
c. persia
d. palestine

Of the following modern day arab states, it was "Palestine" that was allowed representation at the paris conference in 1919, since their national security and interests were at stake. 

Chemical change is a type of change in which new substances are formed. Chemical change usually occur as a result of chemical change. There are many indicators that can show that a substance has undergone chemical change, these include:
1. color change: the substance will change in colour
2. Change in temperature
3. Noticeable change in odour
4. formation of precipitate
5. formation of bubbles
6.Emission of light
7.Formation of a gas.
Substances that undergone these changes have experienced chemical change.