Past Board Exam Concepts Flashcards
1
Q
- Which do float?
a. balsa wood
b. ethylene glycol
c. table salt
d. ethanol
A
a. balsa wood
2
Q
Fundamental class of reactions in which an electron rich
nucleophile selectively bonds with or attacks the positive or
partially positive charge of an atom or a group of atoms to
replace a leaving group
A
Nucleophilic substitution
3
Q
Where is ozone layer found?
A
-Stratosphere
4
Q
What is the solid part of the earth’s crust?
a.hydrosphere
b.lithosphere
c.troposphere
d.atmosphere
A
b.lithosphere
5
Q
Synthetic dye
a.alizatrin
b.melanin
c.carotenoid
A
c.carotenoid
6
Q
One way of obtaining IR spectra of solids is
A
Nojul Mull process
7
Q
What is the sign convention of enthalpy during
endothermic reaction?
A
positive (+)
8
Q
The position and the velocity of an object (particles,
atom) cannot both be measured exactly, at the same time,
even in theory.
A
Heisenberg Uncertainty Principle
9
Q
What is the polymer used for printing and coating?
A
Acrylic and Styrene Acrylic Emulsion
10
Q
Another name for Taurine
A
Aminoethanesulfonate or
2-aminoethanesulfonic acid
11
Q
Internal energy is composed of all energy in the system
except:
a. free energy
b. kinetic and potential energy
c. heat of fusion
d. enthalpy
A
b. kinetic and potential energy
12
Q
Example of pseudo plastic fluid
a. apple sauce
b. rubber latex
c. tap water
d. sewage sludge
A
rubber latex
13
Q
Product of distillation of coal tar
A
phenol (You can find this in Perry HB)
14
Q
What is the simplest type of control commonly expressed
as having on/off position action?
a. Integral
b. Manual
c. Bang Bang
d. Input-Output
A
c. Bang Bang
15
Q
This states that “The state shall recognize and protect
the rights of the indigenous cultural communities to their
ancentral lands as provided by the constitution.”
A
Philippine Mining Act of 1995 (Republic Act No. 7942)
16
Q
Who is the person behind carbon dating method?
A
Willard Libby
17
Q
What is the chemical formula and molecular weight of 11-
tetradecenyl Acetate?
A
C16-H30-O2
18
Q
What is the product when ethanoyl chloride is reacted with propanol?
A
Propane ethanoate and HCl
19
Q
What is the primary use of ethylene?
A
Ripening of fruits
20
Q
What is the common contaminant in the BTEx process?
A
sulfur
21
Q
Where does an enzyme capsaicin commonly found?
A
capsicum
22
Q
What is the other name of bulk temperature?
A
Mixing-Cup Temperature
23
Q
Choose the common methods in the removal of fine particle in hot airstream common in cement production?
a) ESP
b) Bouyancy
c) Cyclone
d) Venturi Scrubber
A
a) electrostatic precipitators (ESPs)
24
Q
What is the method that Wohler do to break the vital force theory in nature?
A
Heating of NH4Cl with AgCN to
form Urea
25
Arrange the following substance in terms of increasing melting point: Palmitic, Stearic, Oleic
Oleic, Palmitic, Stearic
26
What is the common form of nitro-glycerol?
Trinitroglycerin, Nitroglycerin or Nitrate Vasodilator
27
What happen to the pH of carbonated drinks if it open in atmospheric condition?
a) Increase
b) Decrease
c) Same
d) Cannot be determined
a) Increase (becomes more basic)
28
What is the most polar and least polar of the following functional groups: R-OH, R-NH3, R-COOH, C triple bond C and C-C.
Most PolarRCOOH
Least Polar- C-C
29
The range of melting point of the fatty acids.
saturated fatty acid- 100 to 110°C
unsaturated- 70 to 85°C
30
What happen to the enthalpy content of the real gases when it is throttled at constant temperature?
Stays constant
31
a set of processes performed by the living
beings that allow them to interchange MATTER and ENERGY with their environment
METABOLISM
32
The phase that consists of the DISINTEGRATION of
complex organic compound to release energy is known as _______
CATABOLISM
33
The phase that consists of the ARRANGEMENT of organic compounds from simpler compounds to store energy is called _______
ANABOLISM
34
What law is the PRC modernization act?
RA NO 8981
35
Choose whether the following is/are representation of the nuclear fusion:
>The big bang theory
>the radiant energy of the sun
>the formation of deuterium/tritium
all
36
What unit operation originated in Trona Process?
a. Fractional Distillation
b. Crystallization
c. Evaporation
d. Phase Rule
b. Crystallization
37
Hagreave’s process is the production of ____
Sodium Sulfate
38
If the concentration of the reactant increases, the half life decreases, what order of the reaction is this?
2nd order
39
Which of the following is the reaction time is directly proportional to the concentration of the reactant?
Zero order
40
Which of the following process uses the MIMO system in controlling their process parameter?
a. Distillation
b. Extraction
c. Evaporation
d. Crystallization
a. Distillation (Evap sa isang source)
41
How is the fluctuation in the process is controlled?
Equipping the instrument with integral controller
42
In process control, _____ makes the process variable appear to deviate from the setpoint whether any real disturbance is at work or not.
Noise
43
What do you call the temperature in which the reactor condition cannot be controlled?
Runaway Temperature
44
Number of carbon atoms in olvanil?
26 (C26H43NO3)
45
Who discovered x-ray?
Wilhelm Conrad Roentgen
46
How many Amino acids in human protein?
20 amino acids. 9 of them are essential or cannot be made by the
body
47
It us an organic reaction where the unsaturated bonds of
alkenes, alkynes, or azo compounds are cleaved with ozone.
Ozonolysis
48
Hydrocarbon, also called alkane, any of the saturated
hydrocarbons having the general formula Cn H2n+2
paraffins
49
What is the center of an atom?
Nucleus
50
What do you call the blanket of pollutants?
Smog
51
Pollutant produced from coal and petroleum.
Sulfur dioxide is the largest. Followed by NOx and COx
52
Nearest layer of atmosphere from earth’s surface
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
a) Troposphere
53
A method of sequencing amino acids in a peptide
Edman Degradation by Pehr Edman
54
Process of breaking down a large isotope into smaller
isotopes.
a. nuclear fission
b. beta particle emission
c. nuclear fusion
d. gamma ray emission
a. nuclear fission
55
Formula of Red Lead
Pb3O4
56
Can oxygen be synthesized from nitrogen?
a. Yes, by the bombardment of alpha particles
b. Yes, by electron capture
c. Impossible (Unless exposed in temperatures as that of
sun and stars)
c. Impossible (Unless exposed in temperatures as that of
sun and stars)
57
Author of octet rule
Gilbert Lewis
58
Iodine vapor forms iodine crystals when it touches a cold
surface. What is the reverse of the process being
described?
sublimation
59
Notation on alkane containing Cl
a. chloro
b. chloride
c. chlorate
d. chloric
a. chloro
60
Given: Dodecane
I. Is it soluble in water?
II. Is it soluble in hexane?
III. Is it combustible?
IV. Is it solid, liquid or gas at room temp. & atmospheric conditions?
V. Is it denser than water?
I. NO
II. YES
III. YES
IV. LIQUID
V. LESS DENSE
61
A tank is half filled with water, if N2 =1.02 moles and H20
=1.02 moles. What happens to the N2 when dissolved in
water?
a. increase
b. decrease
c. remains the same
d. none of these
c. remains the same
62
Description of a primary and a secondary cell
A primary cell can be recharged while secondary cannot,
Ni-Cd is a primary cell, a dry cell is a secondary cell.
63
Adolf Baeyer’s contribution in medicine, made by reacting
malonic acid and urea with a catalyst is called.
Barbituric acid
64
Which layer of the atmosphere contains the ozone
layer?
Stratosphere
65
Composition of acid in acid rain?
a. nitric and carbonic
b. sulfuric and carbonic
c. nitric and sulfuric
c. nitric and sulfuric
66
How to differentiate alkane alkene and alkyne?
a. combustion on an empty beaker
b. nature of carbon and its branching
c. reaction with Br2
c. reaction with Br2
67
Which of the ff. has a larger ionic nucleus? Na+ or Na?
a. Both
b. Na+
c. Na
d. none of these
c. Na
68
What happens to the melting point of a saturated fatty
acid if -CH2- increase?
a. increase
b. decrease
c. the same
d. none of these
B. Decrease
69
Formula of alar
C6H12N2O3
70
Particle with the same mass as proton
neutron
71
Polymer used in bullet proof vest
a. linear polyethylene
b. polyacrylonitrile
c. polycarbonate
d. polymethylacrylate
a. linear polyethylene
72
Other term of earth wax
ozocerite
73
Other name of Yamatake system (process automation -
DCS or Distributed Control System)
a. android
b. windows
c. azbil
c. azbil
74
What is used in ultrasonic flow meters
Doppler
75
Which of the following is not dependent on temperature
and wavelength?
a. black body
b. gray body
c. plasma
d. moving body
B) Gray body
76
Electronic noise inside an electric conductor which is
independent of applied voltage
a. shot noise
b. Johnson noise
c. white noise
b. Johnson noise
77
Difference between measured value and set point
a. deviation
b. error
c. oscillation
b. error
78
pH or Normal rain and acid rain
Normal rain (5.0-5.5)
Acid rain (4.0)
79
pH of blood
7.35-7.45
80
Who discovered deuterium?
Harold C. Urey
81
What is the common form of nitro-glycerol?
Nitroglycerin
82
A bond in which electrons are shared between elements having a difference in electronegativity of between 0.5 and ~2.0
polar covalent bond
83
Polymer use in bullet proof vest
Linear Polyethylene
84
How do you differentiate electromagnetic radiation?
a. Wavelength
b. Photons
c. Frequency
d. Energy
d. Energy
85
Who discovered resonance?
a. Alfred Nobel
b. Linus Pauling
c. Immanuel/Emmanuel?
d. Le Chatelier
b. Linus Pauling
86
specific groups of atoms or bonds within molecules that
are responsible for the characteristic chemical reactions
of those molecules
functional group
87
Product of reaction between acyl halide and an alcoho
Ester
88
In stem cell studies, a chemical known as telomeres is
attached to the chromosome to promote
longer life. How would you apply this as a chemical
engineer in the field of agriculture and food?
Genetically enhance plants to prolong shelf life
89
What is the first step in utilizing proteins?
Hydrolysis
90
Liquid Nitrogen is placed in an Erlenmeyer flask. Hardboiled egg is then placed on top of the opening, what will
happen?
a. Egg will pop out
b. Nothing
c. Egg will be sucked in
d. The egg will break.
Egg will be sucked in.
Note: The liquid Nitrogen being extremely cold would
lower the pressure in the Erlenmeyer, creating a vacuum
for the egg to be suctioned in.
91
You are an environmental engineer sent to a place with
the cholera epidemic, what is the best thing to do?
a. Care for the sick
b. Treat water supply
c. Assess the environmental aspect
d. None of the above
b. Treat water supply
92
________ are small DNA molecules within a cell that are
physically separated from a chromosomal DNA and can
replicate independently
Plasmids
93
The Nobel Prize for radioactivity discovery was shared
between Curie and Roentgen. Who coined the word
“serendipity” in 1754?
Horace Walpole
94
What is the chemical used in sunblock?
ZnO
95
Ketone and aldehyde in alcohol will form?
Acetals/Ketals
96
What is the other name of aspirin?
acetylsalicylic acid
97
Formation of glucose from non-carbohydrate sources
gluconeogenesis
98
When will a pine tree grow in Alaska?
o Not in a million years
o It depends on the carbon dioxide
o Greenhouse effect
o All of the above
o It depends on the carbon dioxide
99
Who discovered vulcanization?
Charles Goodyear
100
A bond in which electrons are shared between elements having a difference in electronegativity of between 0.5 and 2
Polar Covalent Bond
101
Regeant used in Edman Degradation?
Ninhydrin
102
group of sound with many non harmonic frequency components of varying amplitudes and random phase
Noise
103
A set of independent functions which are solutions to a given differential equation
Eigen Function
104
_______ is synthesized in the brain and kidneys . Synthesized from amino acid Tyrosine then it is converted to ______ by the enzymes Tyrosine Hydroxylase (TH) and l-amino acid.
Dopamine
105
Raoult’s Law is for what kind of solution
Dilute Solution
106
What is the product form when H in carboxylic acid is replaced by an alkyl group?
Esters
107
Method used to purify salt water in other areas?
Reverse Osmosis (for desalination)
108
What block in periodic table has the most number of element?
d-block
109
What property will change in an element during oxidation?
Charge
110
What is the driving force in water cycle?
A. Sun
B. Water Tides
C. Gravity
Sun
111
Which is bigger Cation or Anion?
Ans. ANION - neutral atom that gained electron
CATION- Losses electron
112
Electron that participates in bonding?
valence electron
113
Zoological Question
Why trouts like to live in cold water?
Trouts are cold blooded.
Their metabolism slows down in cold water than in warm water
114
What is the unit of avogadros number?
Atoms/mol
115
Which of the ff. involves a chemical reaction?
A. Reaction of Nonmentals
B. Oxidation Reduction
B. Oxidation Reduction
116
Differentiate electromagnetic waves and radiation?
A. Wavelength
B. Photons
C. Frequency
D. Energy
B. Photons
117
Process of inventing new genetic information into existing cells inorder to modify a specific organism for the purpose of changing its characteristics
Genetic Engineering
118
Plays a major role in large scale production of biochemical products by applying the principles of engineering to the activity of living cells
Biochemical Engineering
119
What is Arrhenius base and acid equilibrium?
A. 0.01 M with pK 1.8
B. 0.1 M of weak acid and 0.01 M of the same acid
C. 0.1 M of acid and 0.1 M of base
C
Arrhenius acid- a substance that dissociates in water to form hydrogen ions (H+)
Arrhenius base- a substance that dissociates in water to form hydroxide (OH-)
120
What will you put in the thermocouple to increase the accuracy of the reading?
Temperature sensors
121
What instrument is used in measuring temperature without contact with the fluid or vessel?
Infrared thermometer / radiation thermometer
122
Kind of flow that is imaginary?
A. One dimensional
B. Turbulent
C. Multi-dimensional
D. Viscous
123
Chemical Name of Sylvite
KCl
124
Biochemical reaction involving single substrate?
Michaelis Menten
125
What happen to the pressure when a balloon is placed in liquid nitrogen ?
A. Low
B. High
C. No change
A. Low
The baloon will shrink
126
TRUE or FALSE
The higher the Ka, the stonger the acid while the higher the pKa the weaker the acid
TRUE
127
Plutonium 238 is used in heart surgery as what?
Pacemaker
128
Americium 241 is used as?
Smoke detectors
129
What makes plastics or polymer biodegradable?
Hydrophilicity
130
Who proposed the Ideal liquid equation?
Clayperon
131
By product of Pomace that is also used in the production of Potassium tartrate?
Argol
132
What type of cement that is unique because it contains tricalcium silicate and bicalcium silicate?
Portland cement
133
Process in which wastewater is subjected to air?
Activated sludge process
134
The minimum amount of energy require to start a chemical reaction?
Activation Energy
135
States that when stress is applied to a system in a state of equilibrium the system reacts in a way to reduce the stress
Le Chatelier’s Principle
136
Where was oil shark recovered?
Kerogen
