CHEM 1B LAB EXAM QUESTIONS
COMPLETE WITH VERIFIED ANSWERS
/. What is more precise, an analytical balance or a top-loading balance? - Answer-
✅Analytical balance
/.Where do analytical balances measure to in lab? - Answer-✅0.0001 g
/.When diluting an acid in the lab always:
Select one:
a. never mix acid with water
b. pour water into acid
c. pour acid into water
d. add a strong base to neutralize it - Answer-✅c
/.Ammonia has a distinct odor, it is good lab practice to inhale the vapors of a reaction
and verify its presence.
Select one:
a. True
b. False - Answer-✅b
/.Who provides information and specific help to labs that are vulnerable to fire?
Select one:
a. The Fire Department
b. Brandeis Public Safety
c. Fire Prevention Team
d. Lab Fire Safety Program - Answer-✅d
/.A top loading balance will contribute to what source of error?
Select one:
a. Acute
b. Systematic
c. Weighing error
d. Random
Feedback - Answer-✅b
/.Liquids can be measured accurately in flasks and beakers.
Select one:
a. True
b. False - Answer-✅b
, /.Thermometers can be forcefully pushed through rubber stoppers if glycerol or water is
applied.
Select one:
a. False
b. True - Answer-✅a
/.To accurately measure a sample on the analytical balance and limit experimental
errors:
Select one or more:
a. Weigh at room temperature
b. Weigh at constant temperature
c. Tare balance
d. Wear gloves - Answer-✅b, c
/.Which is an example of proper laboratory attire?
Select one:
a. Closed toed shoes, long pants, long sleeve shirt, and safety goggles
b. Sandals, yoga pants, tank top, glasses
c. Sneakers, shorts, long sleeve shirt, and safety goggles
d. Boots, shorts, t-shirt, and sunglasses - Answer-✅a
/.s it acceptable to eat/drink in or around the lab?
Select one:
a. Never
b. Yes
c. You may bring a drink but it must drank/stored outside of the lab (e.g. a hallway or
office area) - Answer-✅c
/.If you break a beaker in the lab, what should you do?
Select one:
a. Ask a TA to pick it up, it is their job to handle all hazards
b. Pick up the larger shards, then sweep the smaller ones
c. Make sure you are wearing gloves and use a broom and dustpan to sweep the
broken glass up, then throw it away into a glass waste container
d. Ask a custodian to sweep it up for you - Answer-✅c
/.Reactions that produce harmful gases should be performed:
Select one:
a. Outside
b. On the bench top
c. Under close supervision
COMPLETE WITH VERIFIED ANSWERS
/. What is more precise, an analytical balance or a top-loading balance? - Answer-
✅Analytical balance
/.Where do analytical balances measure to in lab? - Answer-✅0.0001 g
/.When diluting an acid in the lab always:
Select one:
a. never mix acid with water
b. pour water into acid
c. pour acid into water
d. add a strong base to neutralize it - Answer-✅c
/.Ammonia has a distinct odor, it is good lab practice to inhale the vapors of a reaction
and verify its presence.
Select one:
a. True
b. False - Answer-✅b
/.Who provides information and specific help to labs that are vulnerable to fire?
Select one:
a. The Fire Department
b. Brandeis Public Safety
c. Fire Prevention Team
d. Lab Fire Safety Program - Answer-✅d
/.A top loading balance will contribute to what source of error?
Select one:
a. Acute
b. Systematic
c. Weighing error
d. Random
Feedback - Answer-✅b
/.Liquids can be measured accurately in flasks and beakers.
Select one:
a. True
b. False - Answer-✅b
, /.Thermometers can be forcefully pushed through rubber stoppers if glycerol or water is
applied.
Select one:
a. False
b. True - Answer-✅a
/.To accurately measure a sample on the analytical balance and limit experimental
errors:
Select one or more:
a. Weigh at room temperature
b. Weigh at constant temperature
c. Tare balance
d. Wear gloves - Answer-✅b, c
/.Which is an example of proper laboratory attire?
Select one:
a. Closed toed shoes, long pants, long sleeve shirt, and safety goggles
b. Sandals, yoga pants, tank top, glasses
c. Sneakers, shorts, long sleeve shirt, and safety goggles
d. Boots, shorts, t-shirt, and sunglasses - Answer-✅a
/.s it acceptable to eat/drink in or around the lab?
Select one:
a. Never
b. Yes
c. You may bring a drink but it must drank/stored outside of the lab (e.g. a hallway or
office area) - Answer-✅c
/.If you break a beaker in the lab, what should you do?
Select one:
a. Ask a TA to pick it up, it is their job to handle all hazards
b. Pick up the larger shards, then sweep the smaller ones
c. Make sure you are wearing gloves and use a broom and dustpan to sweep the
broken glass up, then throw it away into a glass waste container
d. Ask a custodian to sweep it up for you - Answer-✅c
/.Reactions that produce harmful gases should be performed:
Select one:
a. Outside
b. On the bench top
c. Under close supervision
