Chemistry Lab Safety Quiz

88. For small liquid spills that only affect a small area of skin, immediate flush with flowing water for at least a) 5 minutes b) 10 minutes c) 30 minutes d) 15 minutes

15 minutes

59. Safety in the instructional laboratory is a) the responsibility of the student only b) the responsibility of the professor only c) a shared responsibility

A shared responsibilty

26.What FIRST AID should immediately follow skin or eye exposure to a corrosive chemical (e.g., acid or base)? a. No first aid; go directly to the emergency room. b. Call for medical assistance. c. Rinse with copious amounts of running water. d. Listen for instructions from instructor e. Clean spill with materials from the lab spill kit.

Rinse with copious amounts of running water ?

70. OSHA stands for a)the Occupational Safety and Hazard Agency b)the Occupational Safety and Health Administration c)Only Some Hazards are Actual

The Occupational Safety and Health Administration

14. Long hair in the laboratory must be A. cut short. B. held away from the experiment with one hand. C. always neatly groomed. D.

Tied back or kept entirely out of the way with a hairband, hairpins, or other confining device

46. Hot glass looks the same as cold glass. a. True b. False

True

51. Read all procedures thoroughly before entering the laboratory. a. True b. False

True

86. True or false: Never use a fire blanket until after the fire is extinguished. a) true b) false

True

20. When you finish working with chemicals and other lab substances, always A. treat your hands with skin lotion. B. wash your hands thoroughly with soap and water. C. wipe your hands on a towel. D. wipe your hands on your clothes.

Wash your hands thoroughly with soap and water

34. Some materials should ONLY be used in a laboratory 'fume' hood. Would the following characteristic(s) suggest that a material belongs in this category? Toxic only a. yes b. no

Yes

71. The CAS registry number is a) a rating of toxicity b) a unique identifying number for each chemical c) a rating of flammability

A unique identifying number for each chemical

61. Jewelry is a potential safety issue because: a) it can be damaged by chemical fumes and spills b) it could be stolen c) chemicals can be trapped under it, in contact with sensitive skin

Chemicals can be trapped under it, in contact with sensitive skin

16. The following footwear is best in the laboratory. A. sandals B. open-toed shoes C. closed-toed shoes D. shoes appropriate for the weather

Closed-toed shoes

43. While massing a solid chemical on the balance, Alex finds the mass is larger than necessary and removes a small portion with a spatula. What is the recommended strategy for dealing with the excess material? a. Leave it on the bench for another student to use. b. Return it to the stock bottle - if the spatula used was clean. c. Deposit it in the 'Excess Solids' waste jar on the balance table. d. a & b e. a & c

Deposit it in the 'Excess Solids' waste jar on the balance table

7. If a lab experiment is not completed, you should A. discuss the issue with your instructor. B. get the data from someone else. D. make up some results.

Discuss the issue with your instructor

44. Students who arrive unprepared or inappropriately equipped for a lab class will be . . . a. given time to makeup the lab later. b. dismissed until ready to work. c. given the average grade for that experiment. d. immediately failed in the class. e. given a grade of 'zero' for the experiment.

Dismissed until ready to work

What is the recommended strategy for handling broken or chipped glassware in lab? a. Let the instructor handle all broken glass. b. Using tools (e.g., tongs & dust pan), carry the broken pieces to the trashcan. c. Dispose of all pieces in a puncture-resistant "Broken Glass" box.

Dispose of all pieces in a puncture-resistant "Broken Glass" box ?

9. You are heating a piece of glass and now want to pick it up. You should A. use a rag or paper towels. B. pick up the end that looks cooler. C. use tongs. D. pour cold water on it.

Use tongs

38. Find the MSDS sheet for the following chemical and answer the question. Is the product toxic? Potassium dichromate (K2Cr2O7) a. yes b. no

Yes

15. In a laboratory, the following should not be worn. A. loose clothing. B. dangling jewelry. C. sandals. D. all of the above.

All of the above

41. A hazardous waste in a teaching lab should be . . . a. disposed of as soon as possible to avoid contamination of persons or work areas. b. disposed according to instructions provided. c. kept closed except when waste is being added. d. all of the above e. none of the above - no hazardous wastes are generated in the teaching labs.

All of the above

45. Lightweight gloves available in the labs should be . . . a. used by anyone handling hazardous materials. b. removed before leaving lab & entering public areas. c. changed when contaminated. d. removed before handling common items such as telephones and door knobs. e. all of the above.

All of the above

58. To reduce the probability of accidents: a) use personal protective equipment b) use the smallest quantity of material necessary c) when possible, substitute a less hazardous chemical for a more hazardous one d) practice the habit of accident prevention e) anticipate the possible consequences of the work you do f) all of the above

All of the above

66. Major factors in toxicity include a)dose b)personal factors such as age and gender c)the route of exposure d)all of the above

All of the above

6. After completing an experiment, all chemical wastes should be A. left at your lab station for the next class. B. disposed of according to your instructor's directions. C. dumped in the sink. D. taken home.

Disposed of according to your instructor's directions

77. FLAMMABLE means a) easily ignited and capable of burning rapidly b) capable of autoignition at or only slightly above room temperature. c) the opposite of "inflammable"

Easily ignited and capable of burning rapidly

84. Before you help another person in an emergency, a) evaluate the potential danger to yourself b) act first, think later c) reread the safety policies for the laboratory

Evaluate the potential danger to yourself

27. The Material Safety Data Sheet (MSDS) provides all of the following information EXCEPT: a. Spill and clean-up data b. Fire hazard information c. First aid information for personal exposure d. Experimental procedures using the material e. Health hazard information

Experimental procedures using the material ?

80. Laboratory hoods are NOT to be relied upon for protection from a) implosion b) reducing exposure to harmful vapors c) explosion

Explosion

22. What is the minimum level of personal protection Chris & Alex must wear to be allowed to work in the teaching labs? a. Gloves, goggles, and chemical apron. b. Hiking boots, lab coat & full-face shield. c. Level 'A' protective suit d. Eye protection, closed shoes, and long lab coat. e. Long pants, T-shirt & closed shoes & safety glasses.

Eye protection, closed shoes, and long lab coat

47. Return all unused chemicals to their original containers. a. True b. False

False

48. Pipets are used to measure and dispense small amounts of liquids. You should draw the liquid into the pipet using your mouth. a. True b. False

False

49. Laboratory work can be started immediately upon entering the laboratory even if the instructor is not yet present. a. True b. False

False

50. Chipped or cracked glassware is okay to use. a. True b. False

False

52.You are allowed to enter the chemical preparation/storage area any time you need to get an item. a. True b. False

False

60. True or false: Safety regulations require that contact lenses NOT be worn in the laboratory a) true b) false

False

25. A chemical splashed in the eye(s), should be flushed with running water for at least: a. one minute b. five minutes c. ten minutes d. fifteen minutes e. twenty minutes

Fifteen minutes

72. An LD50 of 20 in mice indicates that a) 50% of a test population of 100-kg mice would be expected to die within a certain time period if exposed to 20 g b)50% of a test population of 100-g mice would be expected to die within a certain time period if exposed to 2 mg c) 50% of a test population of 100-kg mice would be expected to die within a certain time period if exposed to 20 ppm of the vapor

50% of a test population of 100-g mice would be expected to die within a certain time period if exposed to 2 mg

54. You are making 50 mLs of a solution of NaCl which you will use to make quantitative measurements later in the lab. The best glassware to use in preparing this solution is a. A 50 mL volumetric flask b. A 50 mL beaker c. A 50 mL graduated cylinder d. Any of these as long as you are careful to make sure the bottom of the meniscus touches the 50mL line

A 50 mL volumetric flask ?

57. You have a solution of hydrochloric acid and need to mix it with sodium hydroxide. You should a. Add the acid to the sodium hydroxide with stirring b. Add the sodium hydroxide to the acid with stirring c. Either a or b d. Add water to each solution and then mix them together

Add the acid to the sodium hydroxide with stirring

4. If you wear contact lenses in the school laboratory, A. take them out before starting the lab. B. you do not have to wear protective goggles. C. advise your instructor that you wear contact lenses. D. keep the information to yourself.

Advise your instructor that you wear contact lenses

11. When gathering glassware and equipment for an experiment, you should A. read all directions carefully to know what equipment is necessary. B. examine all glassware to check for chips or cracks. C. clean any glassware that appears dirty. D. All of the above.

All of the above

12. You want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled. This is best done by A. lubricating the tubing with water or glycerin. B. using a towel or cotton gloves for protection. C. twisting the tubing and stopper carefully. D. all of the above.

All of the above

68. Some toxic chemicals a)can be assimilated directly through the skin unless proper protection is taken b)can be ingested by transferance from hand to mouth after leaving the laboratory c)can be inhaled even if the substance has a very high boiling point d)all of the above

All of the above

75. Labels on bottles containing hazardous chemicals must indicate a) one of the signal words, Danger, Warning, or Caution b) the principal foreseeable hazard when used in an industrial workplace c) the precautionary measures that will protect users d) the name of the chemical e) first aid instructions f) all of the above

All of the above

82. Centrifuges are particularly unsafe if a) not balanced b) a clinking sound is heard c) starting to walk off the table d) opened prior to coasting to a full stop e) all of the above

All of the above

23. Why are closed shoes required, even on warm days? a. Solid shoes protect feet from cuts from broken glass. b. Solid shoes protect feet from contamination from spills. c. Solid shoes provide better traction than slick sandals. d. both a & b e. all of the above

All of the above ?

78. When diluting an acid with water, a) do not stir the flask, because it might break b) do it quickly, so that a cool fountain of toxic material is ejected from the flask c) always add acid to water, not water to acid, so that the heat of reaction can be controlled

Always add acid to water, not water to acid, so that the heat of reaction can be controlled

17. Horseplay or practical jokes in the laboratory are A. always against the rules. B. okay. C. not dangerous. D. okay if you are working alone.

Always against the rules

1. Flammable materials, like alcohol, should never be dispensed or used near A. an open door. B. an open flame. C. another student. D. a sink.

An open flame

87. Chemicals being transported outside the laboratory or between stockrooms and laboratories should be in break-resistant secondary containers. Secondary containers with carrying handle(s) are commercially available in a variety of sizes. These containers may be made from which of the following? a) metal b) rubber c) plastic d) any of the above

Any of the above

3. Approved eye protection devices (such as goggles) are worn in the laboratory A. to avoid eye strain. B. to improve your vision. C. only if you don't have corrective glasses. D. any time chemicals, heat or glassware are used.

Any time chemicals, heat or glassware are used

65. Who's responsibility is it to be aware of chemical hazards? a)only the professor b)the student, but only after being informed by a professor c)anyone involved in work in a laboratory

Anyone involved in work in a laboratory

5. If you do not understand a direction or part of a lab procedure, you should A. figure it out as you do the lab. B. try several methods until something works. C. ask the instructor before proceeding. D. skip it and go on to the next part.

Ask the instructor before proceeding

8. You are heating a substance in a test tube. Always point the open end of the tube A. toward yourself. B. toward your lab partner. C. toward another classmate. D. away from all people.

Away from all people

67. The four routes by which toxic chemicals can enter the body include: a)inhalation, ingestion, absorption, and injection b)inhalation, indigestion, transmission of bodily fluids, and interjection c)inhalation, constipation, instigation, and investigation

Inhalation, ingestion, absorption, and injection

24. In the teaching labs, contact lens wear: a. Is recommended. b. is not mentioned. c. is allowed as safety eyewear d. is allowed with safety glasses

Is allowed with safety glasses ?

85. The best way to fight a fire a) is with a fire blanket b) is to prevent it in the first place

Is to prevent it in the first place

83. Ultraviolet light should be considered dangerous if a) it has a wavelength longer than 400 nm b) it has a wavelength shorter than 250 nm c) it is seen to have a greenish glow d) it has a wavelength longer than 250 nm

It has a wavelength longer than 250 nm

64. Compound A has a boiling point of 200 oC, while compound B has a boiling point of 100 oC. Which is more of a safety concern? a)B because it has a higher vapor pressure b)A, because it might burn faster c)just knowing the boiling point is not enough to decide the answer to this question

Just knowing the boiling point is not enough to decide the answer to this question

28. What is the best way to warn others about the hazards of your materials? a. Label containers with your name and contents b. Read MSDSs before lab time; list hazards of each material in pre-lab report. c. Label containers with full chemical name, concentration and hazards d. Keep hazardous materials stored securely in the drawer or cupboard.

Label containers with full chemical name, concentration, and hazards ?

81. On hoods where sashes open vertically, work with the hood sash in the _____ position. a) lowest possible b) most comfortable viewing c) highest possible d) mid-point

Lowest possible

69. What does MSDS stand for? a)Material Safety and Data Sheets b)Material Safety and Density Sheets c)Material Security and Data Sheets d)Maternal Safety and Dada Sheets

Material Safety and Data Sheets

62. Latex gloves a)may be reused as long as they are clean b)may be reused only if they have not been permeated c)should never be reused

May be reused as long as they have not been permeated

56. You have a solution of sulfuric acid which you need to dilute. You should a. Measure out the water carefully and add it to the acid with stirring b. Measure out the acid carefully and add it to the water with stirring c. Measure out both the acid and water carefully and pour them simultaneously into a bigger beaker together d. Add base to neutralize the acid, then add the water.

Measure out the acid carefully and add it to the water with stirring

63. Glass tubing should be removed from rubber stoppers a)only when it is broken b)only using extreme caution c)with the help of soap and water d)never

Never

35. Find the MSDS sheet for the following chemical and answer the question. Is the product corrosive? Acetone (CH3COCH3) a. yes b. no

No

36. Find the MSDS sheet for the following chemical and answer the question. Is the product corrosive? Potassium dichromate (K2Cr2O7) a. yes b. no

No

40. Find the MSDS sheet for the following chemical and answer the question. Is the product flammable? Potassium dichromate (K2Cr2O7) a. yes b. no

No

30. Some materials should ONLY be used in a laboratory 'fume' hood. Would the following characteristic(s) suggest that a material belongs in this category? Unpleasant or irritating odor a. yes b. no

No ?

13. Personal eyeglasses provide as much protection as A. a face shield. B. safety glasses. C. splashproof chemical goggles. D. none of the above.

None of the above

2. If a laboratory fire erupts, immediately A. notify your instructor. B. run for the fire extinguisher. C. throw water on the fire. D. open the windows.

Notify your instructor

19. If an acid is splashed on your skin, wash at once with A. soap. B. oil. C. weak base. D. plenty of water.

Plenty of water

79. All containers or laboratory glassware having chemicals in them should be properly labeled. When should you place a label on a container? a) during use of the chemical in the container b) prior to adding a chemical to the container c) after adding a chemical to the container d) after the container has been emptied

Prior to adding a chemical to the container

21. If you weigh out too much of a chemical, you should A. Put the extra back in the bottle B. Put the extra in the trashcan under the balance bench C. Put the extra in a labeled waste container D. Put the extra in a beaker near the balances for other students to use

Put the extra in a labeled waste container

18. If a piece of equipment is not working properly, stop, turn it off, and A. leave it on the table. B. tell your lab partner. C. tell your best friend in the class. D. tell the instructor.

Tell the instructor

10. You have been injured in the laboratory (cut, burn, etc.). First you should A. visit the health center after class. B. see a doctor after school. C. tell the instructor at once. D. apply first aid yourself.

Tell the instructor at once

76. The label CORROSIVE on a chemical container indicates a) that the material can degrade rapidly upon exposure to air b) that contact destroys living tissue as well as equipment c) that the material is an oxidant

That contact destroys living tissue as well as equipment

74. The label WARNING on a chemical container most accurately signifies a) that the hazards can cause serious injury b) that users should be careful when using, handling, or storing the chemical c) that the hazards can cause less than serious injury

That the hazards can cause less than serious injury

73. The label DANGER on a chemical container most accurately signifies a) that the hazards can cause serious injury b) that users should be careful when using, handling, or storing the chemical c) that the hazards can cause less than serious injury

That the hazards can cause serious injury

53. You need to measure out approximately 50 mL of water in order to rinse your product. The best method of doing this is a. Use a 50 mL graduated cylinder and make sure the bottom of the meniscus just touches the 50 mL mark b. Use a 100 mL graduated cylinder and make sure the bottom of the meniscus just touches the 50 mL mark c. Use a 50 mL volumetric flask and make sure the bottom of the meniscus just touches the line on the flask d. Use a 100 mL beaker and fill it to the 50 mL mark on the beaker

Use a 100 mL beaker and fill it to the 50 mL mark on the beaker ?

55. You need to measure out 50 mL of water to mix with your chemical reaction. The best glassware to do this is a. Use a 25 mL graduated cylinder and fill it twice b. Use a 100 mL graduated cylinder and make sure the bottom of the meniscus just touches the 50 mL mark c. Use a 50 mL volumetric flask and make sure the bottom of the meniscus just touches the line on the flask d. Use a 100 mL beaker and fill it to the 50 mL mark on the beaker.

Use a 100 mL graduated cylinder and make sure the bottom of the meniscus just touches the 50 mL mark ?

29. Some materials should ONLY be used in a laboratory 'fume' hood. Would the following characteristic(s) suggest that a material belongs in this category? Volatile only a. yes b. no

Yes

32. Some materials should ONLY be used in a laboratory 'fume' hood. Would the following characteristic(s) suggest that a material belongs in this category? Volatile and toxic a. yes b. no

Yes

33. Some materials should ONLY be used in a laboratory 'fume' hood. Would the following characteristic(s) suggest that a material belongs in this category? Flammable only a. yes b. no

Yes

39. Find the MSDS sheet for the following chemical and answer the question. Is the product flammable? Acetone (CH3COCH3) a. yes b. no

Yes

31. Some materials should ONLY be used in a laboratory 'fume' hood. Would the following characteristic(s) suggest that a material belongs in this category? Corrosive and volatile a. yes b. no

Yes ?

37. Find the MSDS sheet for the following chemical and answer the question. Is the product toxic? Acetone (CH3COCH3) a. yes b. no

Yes ?