Chemistry

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CHEMISTRY III : (CHEMISTRY & YOU) 1

PRETEST
1. The science that tackles the study of matter, its structure and the changes in composition that matter undergoes is
a. Astrologyc. Ecology
b. Chemistry d. Physics
2. When a chemist performs an experiment, the quantity that is being tested is the a. control c. theory
b. law d. variable
3. Juan is comparing how many kilos of rice can be contained in a sack. What process is he doing?
a. counting c. measurement
b. interpolation d. testing
4. After making an observation and proposing a hypothesis, the next step that a scientist should do is to
a. form a conclusion c. analyze the data gathered
b. do another experiment d. state the conclusion
5. A famous chemist has these words: “One may take it for granted that in every reaction there is an equal quantity of matter before and after.” He was able to establish the science of Modern Chemistry. Who was this famous chemist?

a. John Dalton c. Robert Boyle
b. Alexander Fleming d. Antoine Lavoisier
6. Jack and Rose gather information using their five senses. What are they doing? a. stating their conclusion
b. gathering data through observation
c. formulating hypothesis based on the gathered data
d. measuring the exact quantity compared to the other quantities 7. The statement “Mercury is denser than water” is a ___________. a. law c. theory
b. fact d. problem
8. During an experiment, one tries to form his/her theory as quickly as possible. This process is called _____________.
a. data-gathering c. hypothesizing
b. generalizing d. observing
9. Which of the following statements is CORRECT?
a. A scientist’s good characteristics include open-mindedness, honest, perseverance and curiosity.
b. Only the most brilliant people like scientists can make discoveries c. Scientists must follow a strict plan in order to make a successful result d. All of the above
10. In what manner is chemistry of immediate use to an agriculturist? a. in soil preparation c. in the use of soil fertilizer
b. in the sowing technique d. in selecting what seed to plant 11. A doctor performed several laboratory tests like X-ray, complete blood count, urinalysis and stool test on a patient. Which of the following steps in the scientific method did the doctor do?

a. making a generalization c. testing the hypothesis
b. formulating a hypothesis d. identifying a problem
12. Basically, chemistry deals with the study of the following EXCEPT: a. changes that matter undergoes c. properties of matter
b. composition of matter d. forces
13. How many significant figures are there in the measurement 9.0052 kg? a. 5 c. 7
b. 6 d. 8
14. An appropriate metric unit to measure the distance from Manila to Jolo would be: a. meter c. kilometer
b. centimeter d. nanometer
15. The scientific method of solving a problem follows the sequence: a. hypothesize, conclude, experiment c. conclude, hypothesize, experiment b. hypothesize, experiment , conclude d. experiment, hypothesize, conclude 16. The ratio of mass to volume is called

a. area c. density
b. volume d. temperature
17. The number of digits by which a series of number is known with a degree of reliability is called:
a. accuracy c. precision
b. parallax d. significant figures
18. Discoveries are sometimes made through accident. This is called a. invention c. serendipity
b. innovation d. discovery by luck
19. The system of measurement used by scientists around the world is a. British System c. Metric system
b. English System d. All of these
20. Derived quantities are called such because they were based on the: a. SI units c. fundamental units
b. secondary units d. formula
21. What is the equivalent of -40°C in Fahrenheit scale?
a. 32°F c. -32°F
b. 40°F d. -40°F
22. The product of (2 x 103) and (3 x 103) is
a. 6 x 101 c. 6 x 104
b. 6 x 103 d. 6 x 106
23. Which of the following statements is TRUE about a scientific...
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