Handout 1 Introduction to Chemistry

Direction: Choose the letter of the best answer.

1. A lead cylinder has radius 12 cm and length 44 cm and a density of 11.4 g/mL. The mass of the cylinder is

A. 2.27 × 105 g B. 1.89 × 105 g C. 1.78 × 103 g D. 3.50 × 105 g

2. Jamie wants to separate a mixture of water, salt, and sand contained in a flask. Which of the following sets of laboratory apparatuses should she use?

A. filter, tripod, wire gauze, alcohol lamp, distillation apparatus B. sieve , iron stand, distillation apparatus, separatory funnel C. stirring rod, wire gauze, funnel, alcohol lamp, alcohol lamp D. filter, wire gauze, distillation apparatus, tripod, Bunsen burner

3. Sienna is about to stir an acidic mixture that she’s heating, but she doesn’t know which among the four stirring rods in her school laboratory—the metal one, the wooden one, the glass one, and the plastic one—to use. Which should Sienna use?

A. The metal one because metals speed up the heating process. B. The wooden one because unlike metals, wood insulates heat and therefore

doesn’t cause burns. C. The glass one because glass does not react with most substances. D. The plastic one because plastics are durable materials protected by special

coatings

4. Who does not belong to the group? A. John Dalton B. Marie Curie C. E. Rutherford D. J.J. Thompson

5. She studied the physical and chemical properties of 33 essential oils that she herself extracted from Philippine medicinal plants. Flavors from her essential oils found their applications in the creation of appetite enhancers and have potential medicinal properties.

A. Clara Y. Lim-Syliangco B. Luz Oliveros-Belardo C. Mary Ann A. Endoma D. Carmen Velasquez

6. Which scenario most likely involves chemistry?

A. An engineer determines the average velocity of a Ferrari. B. A geologist determines the age of a rock. C. A surgeon looks for abnormalities in his patient’s esophagus using a bioscope. D. An astronomer predicts the next occurrence of comet.

7. You have accidentally broken a test tube and spilled a chemical on the table. Which of the following best explains what you should do?

A. Use water and paper towel to clean up the spill; place the broken test tube in

the disposal container specified by the teacher for sharp objects. B. Throw the glass into the nearest trash bin and let the spill air-dry. C. Quickly dispose of the glass, wipe up the spill with the nearest cloth, and hope

nobody notices. D. Caution your lab partner to avoid the area while you inform the teacher of the

small accident.

8. He pioneered protoplast fusion here in the Philippines wherein two cells are stripped of their walls and then fused to produce hybrids such as Agarias bisporus, a Baguio mushroom.

A. Julian A. Banzon B. Alfredo C. Santos C. Felix Maramba D. Claro Santiago

9. The conversion factor to change meters per second to kilometers per minute is

A. 0.28

𝑘𝑚 ∙ 𝑠

𝑚 ∙ ℎ

B. 3.6

𝑘𝑚 ∙ 𝑠

𝑚 ∙ ℎ

C. 0.006 𝑘𝑚 ∙ 𝑚 ∙ 𝑠 ∙ ℎ D. 16.67 𝑘𝑚 ∙ 𝑚 ∙ 𝑠 ∙ ℎ

10. Which of the following gives the correct number of significant figures of A = 0.0000909009, B = 1010101000000, and C = 45005.5000000004?

A. A = 3, B = 10, C = 5 B. A = 11, B = 13, C = 15 C. A = 6, B = 7, C = 15 D. A = 3, B = 4, C = 5

11. What Fahrenheit temperature is twice the Celsius temperature?

A. 64°𝐹 B. 320°𝐹 C. 200°𝐹 D. 546°𝐹

12. Arrange in increasing order: 290 °𝐾, 21°𝐶, 77°𝐹.

A. 290°𝐾, 21°𝐶, 77°𝐹 B. 77°𝐹, 21°𝐶, 290°𝐾 C. 77°𝐹, 290°𝐾, 21°𝐶 D. 21°𝐶, 290°𝐾, 77°𝐹

Solve. One cubic meter of aluminum has a mass of 2700 kg, and the same volume of iron has a mass of 7860 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of radius 2 cm on an equal-arm balance. (3 points)

******************************

mlznavisa090814