DOUBLE CHECK YOUR ANSWERS PLEASE

1. Which of the following is NOT a property of gases? *

A. Gases are compressible.

B. Gas particles move about rapidly.

C. Gases expand to fill their containers.

D. The density of a gas is similar to that of a liquid.

2. Which physical characteristic DOES NOT apply to a gas? *

A. It can be compressed.

B. Its molecules are separated by large distances.

C. It occupies the total volume of its container.

D. It has a high density.

3. Which of the following statements is incorrect? *

A. Warm air is less dense than cold air.

B. Warm air rises above cold air.

C. When gases are heated, they expand.

D. The properties of gases are very similar to the properties of liquids.

4. If the initial pressure of a 2.00 L gas sample is 2.50 atm, what will the pressure be if the volume is changed to 3.00 L at constant temperature? *

A. 1.50 atm

B. 1.67 atm

C. 15.0 atm

D. 2.40 atm

5. If a 1.50 L gas sample is held at a constant temperature, and its pressure is changed from 2.30 atm to 3.60 atm, what will the final volume be? *

A. 1.50 L

B. 3.45 L

C. 0.958 L

D. 8.28 L

6. Which of the following CORRECTLY describes the motion of gas particles in a container? *

A. Rotational

B. Translational

C. Static

D. Vibrational

7. All of the following represents the characteristics of gas state of matter, EXCEPT: *

A. no definite shape and volume

B. can expand to fill any volume

C. they have high densities

D. easily compressed into smaller volume

8. This scientist formulated the law of diffusion and effusion of gases. Who was he? *

A. John Dalton

B. Robert Boyle

C. Thomas Graham

D. Jacque Charles

9. Which of the following changes are considered NOT dangerous? *

A. spoilage of food

B. corrosion of metal

C. curing of meat

D. burning of garbage

10. At standard temperature and pressure, what is the volume occupied by a mole of any gas? *

A. 0.224 L

B. 2.24 mL

C. 22.4 L

D. 22.4 mL

11. Which equation gives the correct relationship between volume and temperature of a gas? *

A. T1 V1 = T2 V2

B. T1 V2 = T2 V1

C. T2 V1 = T1 V2

D. T2 V2 = T1 V1

12. What is the standard temperature in Kelvin? *

A. 0 Kelvin

B. 25 Kelvin

C. 273 Kelvin

D. 373 Kelvin

13. The greater the ________ of a gas at a given temperature, the smaller its volume. *

A. mass

B. diffusion

C. pressure

D. expansion

14. During exercise, the glycogen in our body is being converted into pyruvic acid. In the presence of oxygen, the pyruvic acid will change into carbon dioxide and water. What will happen to the pyruvic acid if there's not enough amount of oxygen present? *

A. It will turn into lactic acid

B. It will turn into ascorbic acid

C. It will turn into glutamic acid

D. It will turn into phosphoric acid

15. The molar volume of a gas is the volume occupied by 1 mole of a gas at: *

A. 1oC and 1 atm

B. 273oC and 0 atm

C. 1K and 0 atm

D. 273 K and 1 atm

16. Gases having molecules that behave as predicted by the gas laws are called: *

A. ideal gases

B. noble gases

C. rare gases

D. real gases

17. A toy balloon left under the sun at noontime is likely to expand and burst. This illustrates: *

A. Boyles' Law

B. Charles' Law

C. Gay-Lussac's Law

D. Avogadro's Law

18. To expand a 15 L sample of gas to 20 L, it is necessary to: *

A. increase the pressure

B. decrease the number of moles

C. increase the temperature

D. decrease the temperature

19. A sample of carbon dioxide occupies 3 L at 35C and 1 atm. What will happen to its volume if its condition is changed to 48C and 1.5 atm? *

A. The volume will decrease.

B. The volume will increase.

C. The volume will remain the same.

D. The volume cannot be determined.

20. The following statement are beneficial effects of chemical reaction in the environment EXCEPT: *

A. Plants can manufacture their food through the process of photosynthesis.

B. Rusting of iron metals when it is exposed to air and moisture. Is one of the most common forms of corrosion.

C. The plants absorb minerals from the soil where many people depend on soil for food and livelihood.

D. The Water Cycle is the continuous circulation of water within the Earth and atmosphere.

21. Which of the following statements can be best described polymers? *

A. Polymers have low molar mass.

B. Polymers formed by large repeating units of dimer.

C. Polymers can either be isotactic, adiactic or syndiotactic.

D. Polymers formed when an alkane reacts with carboxyl group.

22. All of the following statements are distinct features of polymers EXCEPT: *

A. They can be processed in various ways.

B. They can be very resistant to chemicals.

C. They can be made of petroleum, but not always.

D. They can be both thermal and electrical conductors.

23. During Brigada Eskwela, the teachers and staff used polymer to cover the rust in chairs or tables. What polymer should be used to cover the rust from chairs or tables? *

A. Bakelite

B. Glyptal

C. Polysterene

D. Urea-formaldehyde Resin

24. Why does the polymer Kevlar which is a type of polymer was used in constructing a high- speed racing boat? *

A. because it is resistant to chemicals.

B. because it can process in various ways.

C. because of its high strength and durability.

D. because there is no alternative for this material.

25. Monomers are linked together to form a polymer or the so-called biomolecules. Which of the following is an example of monomer? *

A. Lignin

B. Starch

C. Glucose

D. Glycosaminoglycan