DAY 1 Flashcards
(120 cards)
1
Q
Materials to impede radiation by alpha particles
A
Any material
2
Q
Materials to impede radiation by beta particles
A
0.25 cm aluminum
3
Q
Materials to impede radiation by strong beta particles
A
6-12 mm of Lucite of Plexiglass
4
Q
Materials to impede radiation by fast neutrons
A
Water, paraffin, and concrete
5
Q
Material to impede radiation by slow neutrons
A
Cadmium
6
Q
Materials to impede radiation by gamma particles
A
Thick layer of lead
7
Q
Distance from Earth to most remote known quasar
A
1.4x10^26
8
Q
Distance from Earth to most remote known normal galaxy
A
9x10^25
9
Q
Distance from the Earth to most remote known normal galaxies
A
2x10^22
10
Q
Distance from the Sun to nearest star (Proxima Centauri)
A
4x10^16
11
Q
One light year
A
9.46x10^15
12
Q
Mean orbit radius of the earth about the Sun
A
1.5x10^11
13
Q
Mean distance from Earth to the Moon
A
3.84x10^8
14
Q
Distance from the equator to the North Pole
A
1.00x10^7
15
Q
Mean radius of the earth
A
6.37x10^6
16
Q
Typical altitude (above the surface) of the satellite orbiting the Earth
A
2x10^5
17
Q
Length of a football field
A
9.1 x 10^1
18
Q
Length of a housefly
A
5x10^-3
19
Q
Size f the smallest dust particles
A
~10^-4
20
Q
Size of cells of most living organisms
A
~10^-5
21
Q
Diameter of a hydrogen atom
A
~10^-10
22
Q
Diameter of an atomic nucleus
A
~10^-14
23
Q
Diameter of a proton
A
~10^-15
24
Q
Dictates that the amount of energy that a system may possess is limitless
A
Classical Physics
25
Who discovered Helium
Ramsay and Travers
26
What compound if dehydrated forms water?
Propene
27
How do two free radicals react when they encounter each other?
they unite with covalent bond formation
28
What are sigmatropic rearrangements in organic reactions?
They are different from electrolytic reactions wherein movement of a sigma bond with a simultaneous rearrangement of the pi-system does not occur.
29
How many different tetra-peptides can be made (a) if the peptides contain the residues of asparagine, proline, serine, and methionine and (b) if all 20 amino acids can be used?
256 and 160, 000
30
What is the most oxidized form of nitrogen-fixing bacteria?
Nitrate
31
How to differentiate alkane, alkene, and alkyne?
Reaction with Br2
32
A 1-kg copper bar (coefficient of linear expansion = 17x10^6/degC) is heated at atmospheric pressure from 20 to 50 deg C. What is the change in internal energy (kJ) of the bar? What is the work kJ) of the bar?
11.6, -17.36 kJ
33
Which of the following lipid contain a ceramide unit?
Sphingomyelins
34
Which of the following acid group is present in taurine?
Sulfonic acid
35
Most penetrating radiation
Gamma ray
36
Most abundant metal element in human body
Calcium
37
What happens to the pH of the soda when can was opened?
Increases
38
FOMO and SOMO Molecular Orbital Theory was published by
Kenichi Fuqui
39
What will be released when dopamine level was increased?
Tyrosine and phenylalanine
40
A balloon filled with gas is placed in liquid nitrogen. Relating to gas laws, what will happen?
Lower pressure
41
Ka pag may electric discharge, yung mercury vapor ay nagccombine saan?
Krypton, Argon, Neon
42
Magic Numbers
2, 8, 20, 28, 50,82, 126
43
Resistance to breakage
tensile strength
44
Definition of protein
Polypeptides with >51 amino acids, with 10000 amu
45
Most important property of alkanes
Complete lack of polarity
46
How many hydrogen bonds does uracil and adenine have?
2 HB
47
Cerebrosides belong to
Sphingolipids
48
Chymotrypsin amino acid sequence
Tryptophan, Tyrosine, Phenylalanine, or Leucine
49
Nucleophile of chymotrypsin
Serine
50
Formula of Alar
C6H12N2O3
51
Author of Octet Rule
Gilbert Lewis
52
Adolf Bayer’s contribution in medicine, made by reacting malonic acid and urea with a catalyst is called
Barbituric acid
53
An organic reaction where the unsaturated bonds of alkanes, alkynes or ado compounds are cleaved with ozone
Ozonolysis
54
Developed by Pehr Edman, is a method of sequencing amino acids in a peptide
Edman degradation
55
What is the other name for bulk temperature?
Mixing cup temperature
56
Common method for the removal of fine particles in hot airstream common in cement production
ESP
57
PRC Modernization Act
RA 8981
58
Liquid nitrogen is placed in an Erlenmeyer flask. Hard boiled egg is then placed on top of the opening, what will happen?
Egg will be sucked in
59
Ketone and aldehyde in alcohol will form
Ketals and acetals
60
What is the first step in utilizing proteins
Hydrolysis
61
The rate of nucleophilic substitution action of tertiary-butyl bromide with OH- is found to be independent of the concentration of OH- at any instant. It can be inferred that the reaction is
First-order (SN1)
62
Trimethyl-n-proplyammonium is heated with KOH to yield N,N,N-trimethylamine and
Propene
63
Reduction of ethyl cinnamate using LiAlH4 produces the alcohol:
3-phenylprop-2-en-1-ol
64
Styrene undergoes ozonolysis to yield two carbonyl compounds. Which of the following pairs is produced by this reaction?
Benzaldehyde and formaldehyde
65
In which reaction of alkyl can keto-enol tautomerism exist?
Ozonolysis
66
Chylomicrons are synthesized in
Intestine
67
Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of
Four isoprene units
68
Reaction of benzene with chloride gas to produce trichlorobenzene exemplifies a/an ___ reaction.
Series
69
In the normal breakdown of phenylalanine, it is initially degraded to
Tyrosine
70
Which of the following amino acids can form hydrogen bonds with their side (R) groups?
All of these ( Asparagine, Aspartic acid, Glutamine)
71
What is the product when alpha-amylase acts in amylase?
Different sized oligosaccharide fragments
72
Diabetic patients are found to have an increased ketone concentration in their bodies. What causes this?
Acetoacetic acid/Ketone
73
What is the product of the oxidation of dopamine?
R-Epinephrine
74
What is the role of Ca ions as a signaling agent in synapse?
Sparks or Puffs
75
Which of the following amino acids is the disruptor or breaker of secondary structures?
Proline and glycine
76
A heterocyclic compound has a non-carbon member in the ring.. Which of the following is heterocyclic?
Furan and Pyran
77
3 moles of glucose processes how many moles of lactate?
6 moles
78
What is the smallest unit that retains the physical properties?
Atom
79
Alkali metals
Have low boiling points
80
Which of the following devices is/are sensitive enough to measure the intensity of ionizing radiation?
Geiger Counter and Scintillation Counter
81
Which has the higher melting point: (a) a triglyceride containing only Laurie acid and glycol or (b) a triglyceride containing only stearic acid and glycerol?
Stearic acid
82
Monosaccharides are colorless, srystalline solids, and are very soluble in water. Why?
True, because of their polar hydroxyl groups
83
Adenosine triphosphate, when acted with adenylate Cyclades, produces
Cyclic adenosine monophosphate and pyrosphate
84
Suppose that the yield of aspirin is 75%. How many grams of salicylic acid would be required to give an actual yield of 25 g of aspirin?
25 g
85
Rank the toxicities in terms of the first three most toxic for the following toxic compounds: DDT, Dieldrin, Arsenic, Heptachlor, and Chromium
By ingestion: Dieldrin>Heptachlor>Arsenic>DDT>Chromium
By inhalation: Chromium>Dieldrin>Arsenic>Heptachlor>DDT
86
What is the oxidation number of Cr in the complex ion CrG6 F-ligand?
3
87
An Erlenmeyer flask has an egg on its beak and is put to a bath of liquid nitrogen. What happens to its pressure?
Decreases
88
Which temperature scale is defined as a fraction of the triple point of water?
Kelvin
89
A substance solid/liquid is left at room temperature. What describes the process? What is the melting point?
Delta G = 0
90
An ideal gas undergoes a constant pressure expansion until it reaches an initial temperature of 300 K. Then it undergoes a constant volume cooling where its pressure is reduced to 1/4. Calculate the work done.
-1.87 kJ
91
What is the main purpose of Joule-Thomson Effect?
Cooling
92
For an ideal gas mixture at constant temperature and pressure, the fugacity _____ with increase in mole fraction
Increases
93
Who invented photosynthesis?
Melvin Calvin
94
Proposed the theory of chemical valencies. Introduced the concept of combining power or valence.
Sir Edward Frankland
95
In which layer of the atmosphere is ozone found?
Stratosphere
96
A buckyball is a
Fullerene
97
What changes color when it reacts with acid or base?
Indicator
98
Define ozonolysis
Reaction of ozone followed by the reduction of the presence of zinc and water.
99
A compound given its molecular formula is oxidized with potassium dichromate in the presence of acid. What is the product?
Aldehyde
100
Which process uses air to convert harmful compounds in wastewater into less harmful and stable products?
Aeration
101
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?
As carbon dioxide
102
Determine the percent atom recovery of the Raschig Process.
17.30%
103
Raschig Process
2 C6H6 + 2 HCl + O2 —> 2 H2O + 2 C6H5Cl
104
Which of the following radioactive mudslide is often bombarded with the various isotopes of lead in order to produce most of the new super heavy elements?
Calcium-48 and Nickel-64
105
Determine the uncertainty in positron of a proton that moves at 1/10 the velocity of light. Assume the velocity is measured with a precision of 1%.
1x10^-13 m
106
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?
Green
107
What color of the light is at 4x10^-7?
Violet
108
What is the color of the light at 5x10^-7?
Green
109
What is the color of the light at 6x10^-7?
Orange
110
What is the color of the light at 7x10^-7?
Red
111
Default activity of Carbon-14
15.3 dis/min
112
Two beakers containing sulfuric acid and phosphoric acid separately was neutralized by the same base. Equal amounts of the alkali was used for the neutralization reaction and it produced sulfate ions and di hydrogen phosphate ions, what is the mass ratio of sulfuric acid to phosphoric acid that was originally present in the beakers?
1/2
113
When steam condenses into water at 90 dec C, the entropy of the system decreases. What must be true if the second law of thermodynamics is to be satisfied?
Entropy of the surrounding increases to a greater extent than the decrease in the entropy of the system.
114
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?
Delta G > 0
115
Calculate the volumetric flow rate of leachate through a compacted clay liner if the area of the landfill is 15 ha and the liner thickness is 1m. The hydraulic conductivity is 7.5 x 10^-10 m/s. Assume that the head of water is 0.6 m.
6.75 x 10^-5 m^3/s
116
A sculptor was hired by a firm in BGC to create an ice sculpture of their logo within two days for thei 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?
CaCl2
117
Consider: Cerargyrite
Is it soluble in H2O
Is it soluble in Hexane?
Is it triclinic?
Is it vapor at 1600 deg C?
No
No
No
Yes
118
When 2,3-dimethyl-2-butanol is treated with phosphoric acid at 120 deg Celsius, which among the following is the major product?
2,3-dimethyl-2-butene
119
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 mic, five meters away from the control rods, what would be the expected activity for an additional 30 meters away from it?
0.57 mCi
Hint: I(D)^2
120
Heisenberg’s Uncertainty Principle
Δx(Δp) = h/4pi
Δx(m) (Δv) = h/4pi
