Day 1 - ARC Inorganic, Organic, Nuclear Chemistry Flashcards
For each of the following compounds, determine the weight percentage of the indicated element of the following compounds:
i. copper in cupric oleate
ii beryllium in emerald
iii. iron in prussian blue
iv. sulfur in lapis lazuli
a. 71.32%, 1.95%, 36.67%, 7.88%
b. 3.34%, 6.15%, 19.22%, 55.48%
c. 11.45%, 8.99%, 45.51%, 21.95%
d. 21.94%, 4.48%, 9.63%, 35.84%
C
Radon-222 a radioactive nuclide tends to undergo decay in order to become stable. If it undergoes two successive alpha emissions, followed by two successive beta emissions and one final alpha emission, what would be the stable nucleus formed?
a. 192Ir77
b. 210Pb82
c. 137Cs55
d. 179Hf72
B
One mole of A at one bar and one mole of B at two bar are separated by partition and surrounded by a heat reservoir. Determine the change in entropy when the partition is withdrawn?
a. 12.5 J/mol.K
b. 14.67 J/mol.K
c. 18.41 J/mol.K
d. 16.33 J/mol.K
A
In the study of fats and lipids, determine which of the following two triglycerides has a higher melting point?
Substance A - Lauric Acid and Glycerol
Substance B - Stearic Acid and Glycerol
a. Substance A
b. Substance B
c. Their melting points are equal
d. Insufficient Information
B
What is the organic molecular formual of lindane, a chlorinated pesticide which has been banned. It is composed of 24.781% carbon, 2.082% hydrogen, 73.142% chlorine and has a molecular mass of 290.834?
a. C3H6Cl9
b. C6H12Cl6
c. (CHCl)6
d. C9H6Cl12
C
Sherwood Roland and Mario Molina’s work on stratospheric ozone depletion garnered them the 1995 Nobel Prize in Chemistry. Which among the following species did they determine act as a catalyst for the decomposition of ozone?
a. Refrigerants
b. CClF3
c. Nitrogen Oxides
d. Chlorine Atoms
D
For a biochemical study involving the tigers at Malabon Zoo, a fatty acid was labeled with carbon-14. The sample was then fed to the tigers and after a few hours the tigers breath was analyzed. In which among the following compounds would you expect for the radioactive material to be detected?
a. as Nitrogen
b. As Carbon Dioxide
c. As Hydrogen
d. As water vapor
B
As part of your inheritance, an antique wristwatch was bestowed upon you. After keeping it for one year and 6 months, you were informed that the dials were painted using pigments containing radioactive radium. Analysis showed that the dials had an activity of 0.5 counts per second of beta particles. If 1 microcurie exhibits a dosage of 1000 mrem per year, what would be your accumulative equivalent dose during your exposure when you were unaware of its radioactivity?
a. 0.0135 mrem
b. 0.0203 mrem
c. 0.0305 mrem
d. 0.0458 mrem
B
Classify the following biochemical compounds whether they are hydrophilic, hydrophobic, or amphipathic: Fatty Acid, Glycerol, Soap, or Stearic Acid
a. hydrophilic, hydrophobic, hydrophilic, hydrophobic
b. hydrophobic, hydrophobic, amphipathic, hydrophobic
c. ampiphatic, hydrophilic, hydrophobic, amphipathic
d. hydrophobic, hydrophilic, amphipathic, hydrophobic
D
A manufacturing plant in Laguna that produces boron-based additives is sourcing minerals to use as raw materials for their process. Their standard run utilizes kernite as the source material. Due to the shortage of the aforementioned mineral, the purchasing department sourced borax instead. How much additional borax in kg must be processed in order to maintain the 1 MT Boron produced in a standard run of Kernite?
a. 283 kg
b. 717 kg
c. 2495 kg
d. 6320 kg
C
What are the two most common components of acid rain?
a, Phosphoric acid and Carbonic Acid
b. Sulfuric Acid and Nitric Acid
c. Oxalic Acid and Sulfuric Acid
d. NItric Acid and Phosphoric Acid
B
A BMW is travelling along the North Luzon Expressway towards Tarlac. If the fuel tank contains high octane gasoline, density equal to 0.71 g/ml, how much carbon dioxide was emitted by the vehicle if its gas mileage is 19.75 miles/gal for a distance o 125 miles?
a. 52 kg CO2
b. 66 kg CO2
c. 78 kg CO2
d. 93 kg CO2
A
Match the following radioactive isotope with its corresponding application:
(a) Cobalt-60
(b) Thallium-201
(c) Tritium
(d) Mercury-197
1- Heart Scan in Exercise
2- Measure water content of body
3-Kidney Scan
4- Cancer Therapy
a. a-2, b-3, c-4, d-1
b. a-3, b-1, c-4, d-2
c. a-4, b-1, c-2, d-3
d. a-2, b-4, c-3, d-1
C
Determine the percent atom economy of the Raschig Process.
a. 17.3%
b. 22.4%
c. 34.7%
d. 46.5%
A
Which among the following radioactive nuclide is often bombarded with the various isotopes of lead in order to produce most of the new superheavy elements?
a. Iodine-131 and Lawrencium-257
b. Chromium-51 and Gallium-67
c. Calcium-48 and Nickel-64
d. Selenium-75 and Krypton-81m
C
A person’s sense of smell and taste depends on specific biochemical receptors present in a person’s nose and mouth. In 2004, a Nobel prize was given to the researchers who established this fact and identiied that the type organic compound associated with the sense of smell and taste. The chemical identified was
a. Rhodopsin
b. Retinal
c. Retinol
d. Riboflavin
A
A Chemical Engineer joined Pilipinas Got Talent as a magician that can perform marvelous feats. For the finals, he claims that he can make the audience instantaneously smile or cry by simply waving his hand. To execute his trick, if he releases laughing gas from the front and tear gas at the rear of a 201 row hall, which row will inevitably smile and cry at the same time?
a. 67th row
b. 93rd row
c. 108th row
d. 134th row
D
A hypothetical gas has a density of 1.2504 g/L at STP. Calculate the following in terms of cm/s:
Modal Speed:
a. 4.51x10^4 cm/s
b. 4.33x10^4 cm/s
c. 4.00x10^4 cm/s
d. 4.9x10^4 cm/s
C
Average speed:
a. 4.51x10^4 cm/s
b. 4.33x10^4 cm/s
c. 4.00x10^4 cm/s
d. 4.9x10^4 cm/s
A
Root-mean-square speed:
a. 4.51x10^4 cm/s
b. 4.33x10^4 cm/s
c. 4.00x10^4 cm/s
d. 4.9x10^4 cm/s
D