Question
Question 1
1. Which of the following is a method of purifying water?
A. Fixation
B. Freezing
C. Aeration
D. Combustion
Question 2
2. A chemical reaction in which two elements or radicals change places with two other elements or radicals is a _______ reaction.
A. substitution
B. combination
C. decomposition
D. double replacement
Question 3
3. Based upon the pH scale, a vegetable with a pH of 5.3 would be
A. basic.
B. acidic.
C. neutral.
D. ionic.