Chem 103 Lab Final Exam | Verified Exam Questions and Answers | Latest Updated Study Material 2026

Chem 103 Lab Final Exam | Verified Exam Questions and Answers |
Latest Updated Study Material 2026
Question:
What were the physical properties used to identify alkanes and alkenes?
Answer:

Boiling points and Density

Question:
What color is the potassium permanganate reagent in the Baeyer's test?
Answer:

Purple

Question:
What color is the bromine in the bromine test?
Answer:

Yellowish/ Orange

Question:
Which hydrocarbon will have positive result for the baeyer's and/or bromine test?
Answer:

Alkenes

Question:
What solvent was used to extract curcumin?
Answer:

Isopropyl alcohol

Question:
What is the percent of curcumin found in turmeric?
Answer:

3-5%

, Question:
What can curcumin be used as in the lab?
Answer:

pH Indicator

Question:
What instruments were used in this lab? Also know the parts.
Answer:

Spec 20

Question:
What is the maximum wavelength of curcumin in the UV/Vis sprectrum?
Answer:

425

Question:
What test was used to classify aldehydes and ketones?
Answer:

Tollens

Question:
Will a ketone or aldehyde react with the Tollen's reagent?
Answer:

Aldehyde will react but Ketone will not.

Question:
What does a positive Tollen's test look like?
Answer:

Silver

Question:
What physical state are the unknown ketone/aldehyde in?
Answer:

Liquid