Chem 222 Lab Exam 2010
CHEM 222 Lab Exam March 2009 Lab Coordinator: Mike Daoust
Important Note: There were 20 multiple choice questions on the exam. They are all written here from my memory right after the exam. I have put a check mark on the answer choice that I chose. However, I got two questions wrong and I do not know which ones since the exam was not given back.
Best of Luck! =]
CHEM 222 Lab Exam November 2010 Lab Coordinator: Mike Daoust Note: These are some questions that I got from a friend right after her lab exam.
1. H2O is used to wash the organic layer in experiment w/e because..... - to remove the water soluble NaOH ions in the organic layer - to remove the H2O molecules in the organic layer 2. It is important to know the location of emergency equipments in the lab. - The two fire blankets are beside the entrance to the lab - The first aid kit is beside the prep room door - The fire extinguishers are on the walls beside the reagent benches - The emergency shower is at the back of the lab - none of the above locations are correct 3. In the oxidation of alcohol lab, oxalic acid was added to... - get rid of reduced dichromate salt - react with dichromate ion to form the oxidizing agent - none of the above 4. Which of the following is true about the Wittig reaction lab using phosphonate and benzaldehyde - stereospecific for E alkenes - the phosphonate ester stabilizes a carbanion - A double bond is formed at the carbonyl - all of the above 5. In the modified Wittig reaction, an "instant" ylide, a phosphonate ester, is formed. Which of the following is true?
6. A saturated salt solution allows for - better separation of aqueous and organic layer 7. When using a rotary evaporator... which of the following is true? - it must be at the atmospheric pressure before shutting off the water aspirator - the only way to separate solvents - lowers the atmospheric pressure to lower b.p. - two of the above are true - none of the above are true
Important Note: There were 20 multiple choice questions on the exam. They are all written here from my memory right after the exam. I have put a check mark on the answer choice that I chose. However, I got two questions wrong and I do not know which ones since the exam was not given back.
Best of Luck! =]
CHEM 222 Lab Exam November 2010 Lab Coordinator: Mike Daoust Note: These are some questions that I got from a friend right after her lab exam.
1. H2O is used to wash the organic layer in experiment w/e because..... - to remove the water soluble NaOH ions in the organic layer - to remove the H2O molecules in the organic layer 2. It is important to know the location of emergency equipments in the lab. - The two fire blankets are beside the entrance to the lab - The first aid kit is beside the prep room door - The fire extinguishers are on the walls beside the reagent benches - The emergency shower is at the back of the lab - none of the above locations are correct 3. In the oxidation of alcohol lab, oxalic acid was added to... - get rid of reduced dichromate salt - react with dichromate ion to form the oxidizing agent - none of the above 4. Which of the following is true about the Wittig reaction lab using phosphonate and benzaldehyde - stereospecific for E alkenes - the phosphonate ester stabilizes a carbanion - A double bond is formed at the carbonyl - all of the above 5. In the modified Wittig reaction, an "instant" ylide, a phosphonate ester, is formed. Which of the following is true?
6. A saturated salt solution allows for - better separation of aqueous and organic layer 7. When using a rotary evaporator... which of the following is true? - it must be at the atmospheric pressure before shutting off the water aspirator - the only way to separate solvents - lowers the atmospheric pressure to lower b.p. - two of the above are true - none of the above are true
