A. Choose the letter of the correct answer
1. Which value corresponds to the pH of pure water?
a.14 b.7 c.3 d.1
2. What type of substance is NaCI?
a.acid b.base c.salt d.sugar
3. Which does not belong to the group?
a.sodium b.tungsten c.alumininum d.tin
Answers & Comments
Answer:
1. b. 7
2.a. salt
3. b. tungsten