Which of the following chemical formulas is best used for isomers such as butane and isobutane? A. Empirical formula B. Molecular formula C. Crystal formula D. Structural formula
16. Which of the following chemical formulas is best used for isomers such as butane and isobutane?
A. Empirical formula
B. Molecular formula
C. Crystal formula
D. Structural formula
17. Which of the following scenarios DOES NOT point to the procurement of an assay?
A. a certain type of grass is collected from a forest, and was analyzed for its overall mercury (Hg) content in its roots
B. a blood sample was taken from a dead dolphin for a complete genome sequencing
C. human saliva is collected for the testing of covid-19 genome
D. a sample of urine was collected from a suspected drunk driver for analysis of phenolic compounds
18. Jet is an undergraduate chemistry student, he’s out in the laboratory trying to determine the volatile organic compounds as well as overall protein content of the leaf and stem of a malunggay(Moringa oleifera). He subjected the leaf and stem in a separate digestion reaction (treatment of sulfuric acid), afterwards he subjected the products to high temperature induction to get a dry ash like substance. Which type/s of chemical analysis did Jet employ to reach his objective?
I. Qualitative Analysis
II. Quantitative Analysis
III. Instrumental Chemical Analysis
IV. Wet Chemical Analysis
A. II & IV only
B. I & IV only
C. I, II & IV only
D. I, II, III, IV
19. What type of sample analysis usually operates on the 10-4g scale of sample size?
A. macro analysis
B. semi-micro analysis
C. micro analysis
D. ultra-micro analysis
20.Under what classification does a constituent group when its concentration is between 100 ppm and 1ppb?
A. Major constituents
B. Interferences
C. Minor constituents
D. Trace constituent
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