Can someone help please! Is it physical or chemical? Just say yes or no

yess I think it is bit then again I haven't really do t that

Physical Reaction

4.

8.

9.

11.

15.

17.

19.

20

Chemical Reaction

2.  Hydrochloric acid reacts with  potassium

3. Water is heated and changes..

5. potassium chlorate...

6.

7.

10.

12.

13.

14.

16.

18.

The numbers are the question number

the number are under their specified places if it is chemical then it should be under chemical change and if it is physical it should be under physical change

Question Number 1. is not written as i don't know the answer.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

lol idk man i guess u gotta ask bill nye the science guy