Question: What should you always do if you have to leave the lab for fuel or need a classmate who is unwell while in the midst of carrying out an experiment?
Answer: Inform lab instructor/TA.
Question: Which of the following yields N-acetyl-D-glucosamine on hydrolysis.
Answer Choices:
Cellulose
Heparin
Chitin
Amylopectin
Amylose
Answer: Chitin
Question: Which of the following statements is not true about a bomb calorimeter?
Answer Choices:
Inner chamber contains the test material
Calorimeter is insulated
Outer chamber contains oxygen
Outer chamber contains water
Answer: Outer chamber contains oxygen
Question: Which compartment does bone belong to?
Answer Choices:
Fat Free Mass
Fat Mass
Answer: Fat Free Mass
Question: The three most common homoglycans found in nature are cellulose, starch and ________.
Answer Choices:
Amylose
Lactose
Fructose
Glycogen
Sucrose
Answer: Glycogen
Question: Other than solubility of sample in the solvent, what is the criteria for the solvent [other than cheap and nontoxic] used for preparing the sample that impacts the experiment?
Answer: The solvent volume is not too big to ensure the spot of the sample is [small].
Question: The quality of a sound is based on the atmospheric pressure at the time the sound is generated.
Answer Choices:
True
False
Answer: False
Question: a) Indicate if the following are do’s or don’ts for treatment for burning clothing:
b) Bringing person with burning clothing to safety shower do
c) Using the hood alone to dispose of chemicals by evaporation don’t
Answer: a) don’t
b) do
Question: The independent variable is the variable that is manipulated in an experiment.
Answer Choices:
True
False
Answer: True
Question: What actions should you take if the fire alarm goes off?
Answer: Stop all work and leave all chemicals and equipment in the lab. Follow the lab instructor’s instructions and exit the building as soon as possible. Assemble outside the building in the area directed by the lab instructor.
Question: Let’s consider that ethyl acetate is the ideal solvent for this TLC experiment. What might have happened to the spots if you had used acetone as the eluent instead of ethyl acetate. Spots move towards top of TLC plate because:
Answer: Acetone more polar, overcomes attractions of sample to adsorbent better.
Question: Which compartment does body water belong to?
Answer Choices:
Fat Mass
Fat Free Mass
Answer: Fat Free Mass
Question: Define the term adsorption in relation to, or relevant chromatography.
Answer: Adsorption is the attachment of a compound to particles of the stationary phase. In TLC, separation is based on the relative differences in this absorption.
Question: Measurement of the amount of _____ released in a chemical reaction is defined as calorimetry.
Answer Choices:
Hydrogen
Water
Energy
Oxygen
Answer: Energy
Question: The Liter is the base unit of measure of volume.
Answer Choices:
True
False
Answer: True
Question: Which compartment does glycogen belong to?
Answer Choices:
Fat Mass
Fat Free Mass
Answer: Fat Free Mass
Question: What is the purpose of having very small bores on the spotters?
Answer: So the solvent samples are dissolved in it evaporate quickly.
So very viscous samples can be taken up by the spotter.