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pisipi > REFRESHER DAY 1 PART 2 > Flashcards

REFRESHER DAY 1 PART 2 Flashcards

1
Q

For each of the following compounds, determine the weight percentage of the following compounds:
[a.] Copper in Cupric Oleate
[b.] Beryllium in Emerald
[c.] Iron in Prussian Blue
[d.] 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%

A

C: 11.45%, 8.99%, 45.51%, 21.95%

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2
Q

Molecular Formula:

Cupric Oleate

A

Cu(C18H33O2)2

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3
Q

Molecular Formula:

Emerald

A

Be3 Al2 Si6 O3

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4
Q

Molecular Formula:

Lapis Lazuli

A

Na4 S Si3 Al3 O12

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5
Q

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

A

B: 210Pb82

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6
Q

One mole of one bar and one mole of B at two bar are separated by a partition and
surrounded by a heat reservoir. Determine the change in entropy when the partition is
withdrawn?

A: 12.50 J/mol K
B: 14.67 J/mol K
C: 18.41 J/mol K
D: 16.33 J/mol K

A

A: 12.50 J/mol K

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7
Q

In the study of fats and lipids,
determine which of the 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

A

B: Substance B

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8
Q

What is the organic molecular formula 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

A

C: (CHCl)6

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9
Q

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

A

D: Chlorine Atoms

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10
Q

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

A

B: As Carbon Dioxide

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11
Q

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

A

B: 0.0203 mrem

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12
Q

Classify the following biochemical compounds whether they are hydrophilic,
hydrophobic, or amphipathic: Fatty Acid, Glycerol, Soap, Stearic Acid

A: Hydrophilic, Hydrophobic, Hydrophilic, Hydrophobic
B: Hydrophobic, Hydrophobic, Amphipathic, Hydrophobic
C: Amphipathic, Hydrophilic, Hydrophobic, Amphipathic
D: Hydrophobic, Hydrophilic, Amphipathic, Hydrophobic

A

D: Hydrophobic, Hydrophilic, Amphipathic, Hydrophobic

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13
Q

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

A

C: 2495 kg

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14
Q

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

A

B: Sulfuric Acid and Nitric Acid

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15
Q
  1. A BMW is travelling along the North Luzon Expressway towards Tarlac. If the fuel tank contains high octane gasoline,
    density equal to 0.71 gm/mL, How much carbon dioxide was emitted by the vehicle if its gas mileage is 19.75 miles/gal for
    a distance of 125 miles?

A; 52 kg CO2
B: 66 kg CO2
C: 78 kg CO2
D: 93 kg CO2

A

A; 52 kg CO2

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16
Q
  1. 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

A

C: a-4, b-1, c-2, d-3

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17
Q

Determine the percent atom economy of the Raschig Process.

A: 17.3%
B: 22.4%
C: 34.7%
D: 46.5%

A

A: 17.3%

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18
Q

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

A

C: Calcium-48 and Nickel-64

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19
Q

Who produced I131?

A

Glenn T. Seaborg

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20
Q

discovered 10 elements from Plutonium to Lawrencium

A

Glenn T. Seaborg

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21
Q

I-131

A

thyroid malfunction diagnosis

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22
Q

Cr-51

A

diagnose Albinism

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23
Q

Ga-67

A

whole body scan for tumors

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24
Q

Se-75

A

pancreas scan

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25
Q

Kr-81

A

lung ventilation scan

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26
Q

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
identified 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: Rhodopsin

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27
Q

discovered rhodopsin

A

Richard Axel and Linda Buck

28
Q

sense of sight

A

Retinal

29
Q

discovered retinal

A

George Wald

30
Q

Vitamin A

A

Retinol

31
Q

Vitamin B12

A

Riboflavin

32
Q

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

A

D: 134th Row

33
Q

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: 4.90x10^4 cm/s

A

C: 4.00x10^4 cm/s

34
Q

A hypothetical gas has a density of 1.2504 g/L at STP. Calculate the following in terms of cm/s:

Average Speed
A: 4.51x10^4 cm/s
B: 4.33x10^4 cm/s
C: 4.00x10^4 cm/s
D: 4.90x10^4 cm/s

A

A: 4.51x10^4 cm/s

35
Q

A hypothetical gas has a density of 1.2504 g/L at STP. Calculate the following in terms of cm/s:

Root-Mean-Square Speed
A: 4.51x10^4 cm/s
B: 4.33x10^4 cm/s
C: 4.00x10^4 cm/s
D: 4.90x10^4 cm/s

A

D: 4.90x10^4 cm/s

36
Q

Determine the uncertainty in position of a proton that moves at 1/10 the velocity of light. Assume the velocity is measured with a precision of 1%.

A: 4.67 m
B: 1x10^-13 m
C: 0.001528 m
D: 3x10^7 m

A

B: 1x10^-13 m

37
Q

What is the color of the light of a 75-watt light source that was able to emit 9.91x10^20 photons of a monochromatic
radiation for 5.0 s?

A: Red
B: Yellow
C: Blue
D: Green

A

D: Green

38
Q

Halogens have the tendency to form compounds with one another called Interhalogens. which among the following
molecules has the LOWEST boiling point?

A: Bromine Chloride
B: Iodine Bromide
C: Chlorine Fluoride
D: Bromine Fluoride

A

C: Chlorine Fluoride

39
Q

What is the molecular weight of a sample of cellulose acetate if its 0.2% (w/v) solution in acetone (sp. gr. = 0.80) shows an osmotic rise of 23.1 mm against pure acetone at 27 deg C?

A: 19,900 g/mol
B: 27,500 g/mol
C: 32,600 g/mol
D: 44,800 g/mol

A

B: 27,500 g/mol

40
Q

Twenty-five bone samples from Mindoro is believed to have come from a new species of prehistoric humanoids. The activity of carbon-14 in a femur sample was measured to be at 0.0019 disintegrations of C-14 per minute per gram of C-12. What is the possible age range of the retrieved prehistoric humanoid?

A: Between 65,000 to 70,000 years old
B: Between 70,000 to 75,000 years old
C: Between 75,000 to 80,000 years old
D: Between 80,000 to 85,000 years old

A

B: Between 70,000 to 75,000 years old

41
Q

Two beakers containing sulfuric acid and phosphoric acid separately was neutralized by the same base. If equal amounts of the alkali was used for the neutralization reaction and it produced sulfate ions and dihydrogen phosphate ions, what is the mass ratio of sulfuric acid to phosphoric acid that was originally present
in the beakers?

A: 1/2
B: 3/7
C: 5/4
D: 6/11

A

A: 1/2

42
Q

Consider the following sequence of reactions:
(a.) A silver nitrate solution was mixed with 0.13 g of Copper where 0.433 g of silver is produced.
(b.) 0.47 g Cu was produced by mixing 0.13 g of Aluminum with a copper sulfate solution
(c.) 0.13 g of hydrogen from an acid was produced after mixing the latter with 1.17 g of Aluminum

Find the equivalent weight of the following species in terms of grams.

Equivalent Weight of Silver

A: 5.45 g
B: 9.01 g
C: 32.5 g
D: 108.4 g

A

D: 108.4 g

43
Q

Find the equivalent weight of the following species in terms of grams.

Equivalent Weight of Copper

A: 5.45 g
B: 9.01 g
C: 32.5 g
D: 108.4 g

A

C: 32.5 g

44
Q

Find the equivalent weight of the following species in terms of grams.

Equivalent Weight of Aluminum

A: 5.45 g
B: 9.01 g
C: 32.5 g
D: 108.4 g

A

B: 9.01 g

45
Q

What is the concentration in g/L of a 12 cc solution of sulfuric acid that can be neutralized with 15 cc of 1/10 N Sodium
Hydroxide solution?

A: 4.72 g/L
B: 6.13 g/L
C: 9.45 g/L
D: 13.81 g/L

A

B: 6.13 g/L

46
Q

When steam condenses into water at 90 deg C, the entropy of the system decreases.
What must be true if the second law of thermodynamics is to be satisfied?

A: Entropy of the universe also decreases
B: Entropy of the surrounding increases to the same extent to which entropy of the system decreases
C: Entropy of the surrounding also decreases
D: Entropy of the surrounding increases to a greater extent than the decrease in the
entropy of the system

A

D: Entropy of the surrounding increases to a greater extent than the decrease in the
entropy of the system

47
Q

In which of the following cases does entropy decreases?

A: Polymerization of Styrene and Butyl Acrylate
B: Dissolving Mohr’s salt in water
C: Expansion of high purity hydrogen gas
D: Melting silver ingots

A

A: Polymerization of Styrene and Butyl Acrylate

48
Q

Assuming a situation where a strong acid is mixed with a strong base, if each solution has a concentration of 1 N, which mixture will display the highest increase in temperature?

A: 25 mL acid and 25 mL base
B: 20 mL acid and 30 mL base
C: 10 mL acid and 40 mL base
D: 35 mL acid and 15 mL base

A

A: 25 mL acid and 25 mL base

49
Q

When benzene and naphthalene is mixed in a single container at room temperature,
an ideal solution will be formed. Which among the following expressions does NOT describe the aforementioned process?

A: delta S_system is positive
B: delta H_system = 0
C: delta G > 0
D: delta S_surrounding is zero

A

C: delta G > 0

50
Q

For the following process occurring at 100 deg C and 1 atm:

H2O (l) —–> H2O (g)

Which among the following statements is correct?

A: delta S_system > 0 & delta S_surrounding > 0
B: delta S_system < 0 & delta S_surrounding > 0
C: delta S_system < 0 & delta S_surrounding < 0
D: delta S_system > 0 & delta S_surrounding < 0

A

D: delta S_system > 0 & delta S_surrounding < 0

51
Q

A 5 kg Thorium ore sample was shipped from Sweden to the Philippines in order to be studied by the experts in the Philippine Nuclear Research Institute. A chemical engineer was assigned to determine the age of the ore sample. If she was able to collect 7.32x10^-4 mL of helium gas at STP and detect 500 nanograms of Thorium-232, what is the age of the ore sample? The halflife of Thorium-232 is 1.39x10^10 years.

A: 3.34x10^8 years old
B: 2.51x10^10 years old
C: 1.95x10^12 years old
D: 7.38x10^14 years old

A

B: 2.51x10^10 years old

52
Q

Which among the following organic molecules is properly named based on the IUPAC guidelines for nomenclature?

A: 2-butyl-3-methyl-1-pentene
B: 3-ethyl-3-octen-5-ol
C: 4-tert-butyloctane
D: 2-methyl-2-isopropylheptane

A

C: 4-tert-butyloctane

53
Q

A new radioisotope, represented has
been isolated by scientists from CERN. A nuclear chemist was given the responsibility of studying its decay. By performing tests, he observed that the half-life of the isotope is 5 days. If he had 0.1 moles of the radioisotope initially, how many atoms of it will decay
on the fifteenth day in Curies?

A: 6.59x10^5 Ci
B: 3.76x10^5 Ci
C: 2.87x10^5 Ci
D: 7.11x10^5 Ci

A

B: 3.76x10^5 Ci

54
Q

Researchers from the University of Santo Domingo were able to create two new
compounds from two hypothetical elements A and B. The compounds properties were measured as follows
[a.] 64.5 grams of compound A2B3 were mixed with 135.18 grams of benzene. It was then
cooled until the solution froze at 0.734 deg Celsius.
[b.] A solution comprised of 95.27 grams of AB4 in 41.77 grams of ethanol boiled at 83.60 deg Celsius.

What is the molecular weight of A2B3?

A: 398 g/mol
B: 507 g/mol
C: 612 g/mol
D: 791 g/mol

A

B: 507 g/mol

55
Q

What is the molecular weight of AB4?

A: 172 g/mol
B: 933 g/mol
C: 545 g/mol
D: 467 g/mol

A

D: 467 g/mol

56
Q

A chemical engineering student was tasked with preparing two solutions for an experiment. For one of the solutions, the
student dissolved a nonvolatile, non-electrolyte in 5 mL of water and diluted it to the mark of a 25 mL volumetric flask producing a 0.05 M solution. For the other solution, the student simply dissolved a
finite amount of sodium chloride in a 150 mL volumetric flask, initially containing 60 mL of deionized water, before diluting it to the mark, producing a 0.03 M aqueous
solution. The student then took 20 mL aliquots of each solution and placed them beside one another inside a glass cover.
Assuming the solutions reached
equilibrium:

What is the volume of the non-electrolyte solution aliquot?

A: 23.14 mL
B: 20.77 mL
C: 18.18 mL
D: 15.64 mL

A

C: 18.18 mL

57
Q

What is the volume of the sodium chloride solution aliquot?
A: 24.36 mL
B: 19.23 mL
C: 16.86 mL
D: 21.82 mL

A

D: 21.82 mL

58
Q

For each of the following, determine the main physiological active substance
obtain derived from them:
[a] Pituitary Gland
[b] Sap of Opium Seeds
[c] Belladonna Plant
[d] Bark of a Willow Tree

A: Opium, Beta Endorphin, Salicin, Atropine
B: Atropine, Salicin, Opium, Beta Endorphin
C: Salicin, Atropine, Beta-Endorphin, Opium
D: Beta-Endorphin, Opium, Atropine, Salicin

A

D: Beta-Endorphin, Opium, Atropine, Salicin

59
Q

A sculptor was hired by a firm in BGC to create an ice sculpture of their logo within two days for their 50th Anniversary. Given the time constraint, the sculptor
needs to soften the ice in certain spots immediately. Which among the following
salts should the sculptor use for this task to efficiently make use of his time?

A: KCl
B: MgSO4
C: CaCl2
D: AgCl

A

C: CaCl2

60
Q

Consider: Cerargyrite
I – Is it soluble in H2O?
II – Is it soluble in Hexane?
III – Is it triclinic?
IV – Is it vapor at 1600 deg C?

A: No, Yes, Yes, Yes
B: Yes, Yes, No, No
C: No, No, No, Yes
D: Yes, No, Yes, No

A

C: No, No, No, Yes

61
Q

Menthol is used to flavor a variety of food products. Its most stable configuration is 2-isopropyl-5-methylcyclohexanol where the hydroxyl functional group is in the equatorial position. Which among the following does not describe this configuration?

A: The isopropyl group is attached on the equatorial position and is trans to the
hydroxyl functional group
B: The methyl group is attached on the axial position and is trans to the hydroxyl group
C: The methyl group is attached to the equatorial position and is trans to the isopropyl group
D: The isopropyl group is attached to the equatorial position and is trans to the
methyl group

A

B: The methyl group is attached on the axial position and is trans to the hydroxyl group

62
Q

When 2,3-dimethyl-2-butanol is treated with phosphoric acid at 120 deg Celsius, which among the following is the Major Product?

A: 2,3-dimethyl-1-butene
B: 2,3-dimethyl-2-butene
C: 2,4-dimethyl-2-butene
D: 2,3-dimethyl-1-butene

A

B: 2,3-dimethyl-2-butene

63
Q

For a batch of compromised plutonium fuel rods that are being disposed off, an 85 kg
worker accidentally inhaled 100 microgram of Plutonium-239 (half-life = 2.41x10^4 year). If each disintegration produces 5.15 MeV and 16 hours has passed from the time of inhalation:

What is the equivalent dose?
A: 1.84x10^-3 Sv
B: 4.27x10^-6 Sv
C: 3.66x10^-4 Sv
D: 8.64x10^-6 Sv

A

D: 8.64x10^-6 Sv

64
Q

For a batch of compromised plutonium fuel rods that are being disposed off, an 85 kg
worker accidentally inhaled 100 microgram of Plutonium-239 (half-life = 2.41x10^4 year). If each disintegration produces 5.15 MeV and 16 hours has passed from the time of inhalation:

What is the absorbed dose?

A: 6.32x10^-7 Gy
B: 5.42x10^-5 Gy
C: 1.28x10^-6 Gy
D: 2.73x10^-4 Gy

A

C: 1.28x10^-6 Gy

65
Q

A nuclear engineer is recalibrating a Geiger counter for detecting the neutrons within the immediate vicinity of used control rods. If the measured activity is at 28 mCi, five meters away from the
control rods, what would be the expected activity for an additional 30 meters away
from it?

A: 0.57 mCi
B: 0.78 mCi
C: 0.43 mCi
D: 0.96 mCi

A

A: 0.57 mCi

pisipi (13 decks)

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