Organic Chemistry Lab Exam 2026
Questions and Answers
which of the following pieces of lab glass can be safely evacuated? - Correct
answer-filter flasks and round bottom flasks
What is the principle advantage of using borosilicate glass instead of soda-lime
glass in the lab? - Correct answer-borosilicate glass has a low thermal expansion
coefficient
Liebig condenser - Correct answer-Cooling a vapour and condensing it into a
liquid
Allhin condenser - Correct answer-used to cool hot vapors or liquids
Graham Condenser - Correct answer-used to cool hot vapors or liquids
Dimroth condenser - Correct answer-used to cool hot vapors or liquids (spirals
closer together and smaller than Graham- mouthpieces also on the same side)
Which statement below best explains the meaning of the symbol on the adapter
shown below? - Correct answer-(adapter shows a reading of 24/40)
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,The hose barb is 24 mm in diameter, 40 mm long, an tapers at a 24:40 ratio
Which piece cannot be evacuated safely, but is designed to facilitate mixing by
swirling and to discourage evaporation of solutions? - Correct answer-Erlenmeyer
flasks
Which of the following heat sources is specifically designed for use in heating the
contents of round-bottomed flasks? - Correct answer-thermowells
Which of the following statements regarding latex tubing in the lab is/are generally
correct? - Correct answer-it IS suitable for low pressure gas transmission and low
pressure water transmission
-it can NOT be used when pipetting volatile organics by mouth and is NOT
suitable for attaching a vacuum source
Which statement best describes the purpose of a variac or rheostat? - Correct
answer-it regulates current to a device, most often to control stirring or heating
rates
Generally, what is the maximum amount of liquid that can safely be contained in a
500 mL round-bottomed flask like the one pictured below? - Correct answer-250
mL
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, Which of the following is/are benefits of using protective gloves made of nitrile
instead of latex in the organic chemistry lab? - Correct answer-They are resistant to
a greater range of organic solvents and they are made of synthetic rubber which
eliminates allergy concerns
Which of the following features are required for safety glasses worn in the organic
chemistry lab? Choose all that apply - Correct answer-articulated brow, side splash
protection, and ANSI Z87 impact rating
Match the following pieces of glassware with the most suitable type of device for
securing it to a rail or ring-stand. - Correct answer--two finger clamp- round
bottomed flask with standard taper ground glass joints
-iron ring- separatory funnel
-three fingered- filter flask
Buchner funnel - Correct answer-filters solids from liquids using a mild vacuum
separatory funnel - Correct answer-separates liquids based on density
addition funnel - Correct answer-funnel used for adding solution liquids
powder funnel - Correct answer-Used for adding solid reagents to a flask
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
Questions and Answers
which of the following pieces of lab glass can be safely evacuated? - Correct
answer-filter flasks and round bottom flasks
What is the principle advantage of using borosilicate glass instead of soda-lime
glass in the lab? - Correct answer-borosilicate glass has a low thermal expansion
coefficient
Liebig condenser - Correct answer-Cooling a vapour and condensing it into a
liquid
Allhin condenser - Correct answer-used to cool hot vapors or liquids
Graham Condenser - Correct answer-used to cool hot vapors or liquids
Dimroth condenser - Correct answer-used to cool hot vapors or liquids (spirals
closer together and smaller than Graham- mouthpieces also on the same side)
Which statement below best explains the meaning of the symbol on the adapter
shown below? - Correct answer-(adapter shows a reading of 24/40)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,The hose barb is 24 mm in diameter, 40 mm long, an tapers at a 24:40 ratio
Which piece cannot be evacuated safely, but is designed to facilitate mixing by
swirling and to discourage evaporation of solutions? - Correct answer-Erlenmeyer
flasks
Which of the following heat sources is specifically designed for use in heating the
contents of round-bottomed flasks? - Correct answer-thermowells
Which of the following statements regarding latex tubing in the lab is/are generally
correct? - Correct answer-it IS suitable for low pressure gas transmission and low
pressure water transmission
-it can NOT be used when pipetting volatile organics by mouth and is NOT
suitable for attaching a vacuum source
Which statement best describes the purpose of a variac or rheostat? - Correct
answer-it regulates current to a device, most often to control stirring or heating
rates
Generally, what is the maximum amount of liquid that can safely be contained in a
500 mL round-bottomed flask like the one pictured below? - Correct answer-250
mL
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, Which of the following is/are benefits of using protective gloves made of nitrile
instead of latex in the organic chemistry lab? - Correct answer-They are resistant to
a greater range of organic solvents and they are made of synthetic rubber which
eliminates allergy concerns
Which of the following features are required for safety glasses worn in the organic
chemistry lab? Choose all that apply - Correct answer-articulated brow, side splash
protection, and ANSI Z87 impact rating
Match the following pieces of glassware with the most suitable type of device for
securing it to a rail or ring-stand. - Correct answer--two finger clamp- round
bottomed flask with standard taper ground glass joints
-iron ring- separatory funnel
-three fingered- filter flask
Buchner funnel - Correct answer-filters solids from liquids using a mild vacuum
separatory funnel - Correct answer-separates liquids based on density
addition funnel - Correct answer-funnel used for adding solution liquids
powder funnel - Correct answer-Used for adding solid reagents to a flask
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
