QUIZ 1 – Chapter 1
Total time: 10 minutes
**Part I. (8 points) Multiple choice questions**
**Question 1:** If the matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) \_\_\_\_\_\_\_\_.
A. heterogeneous mixture
B. mixture of elements
C. homogeneous mixture
D. compound
**Question 2:** Which of the following image(s) shows a high precision?
A. (1) and (2)
B. (2) and (3)
C. (3) and (4)
D. (4) and (1)
**Question 3:** What is the scientific notation of 1234?
A. 1.234 × 103
B. 1.234 × 10-3
C. 12.34 × 102
D. 12.34 × 10-2
**Question 4:** Which of the following numbers has three (03) significant numbers?
A. 151.0
B. 0.00150
C. 0.15
D. 0.015
**Part II. (2 points) Long answer question**
**Question 5:** What is the correct result (indicating the proper number of significant figures) of the following addition: (12 + 1.2 + 0.12 + 0.012)? Explain the result.