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CHE BOARD EXAM > Past Board Exam Concepts > Flashcards

Past Board Exam Concepts Flashcards

1
Q
  1. Which do float?
    a. balsa wood
    b. ethylene glycol
    c. table salt
    d. ethanol
A

a. balsa wood

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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

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3
Q

Where is ozone layer found?

A

-Stratosphere

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4
Q

What is the solid part of the earth’s crust?
a.hydrosphere
b.lithosphere
c.troposphere
d.atmosphere

A

b.lithosphere

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5
Q

Synthetic dye
a.alizatrin
b.melanin
c.carotenoid

A

c.carotenoid

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6
Q

One way of obtaining IR spectra of solids is

A

Nojul Mull process

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7
Q

What is the sign convention of enthalpy during
endothermic reaction?

A

positive (+)

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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

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9
Q

What is the polymer used for printing and coating?

A

Acrylic and Styrene Acrylic Emulsion

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10
Q

Another name for Taurine

A

Aminoethanesulfonate or
2-aminoethanesulfonic acid

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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

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12
Q

Example of pseudo plastic fluid
a. apple sauce
b. rubber latex
c. tap water
d. sewage sludge

A

rubber latex

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13
Q

Product of distillation of coal tar

A

phenol (You can find this in Perry HB)

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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

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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)

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16
Q

Who is the person behind carbon dating method?

A

Willard Libby

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17
Q

What is the chemical formula and molecular weight of 11-
tetradecenyl Acetate?

A

C16-H30-O2

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18
Q

What is the product when ethanoyl chloride is reacted with propanol?

A

Propane ethanoate and HCl

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19
Q

What is the primary use of ethylene?

A

Ripening of fruits

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20
Q

What is the common contaminant in the BTEx process?

A

sulfur

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21
Q

Where does an enzyme capsaicin commonly found?

A

capsicum

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22
Q

What is the other name of bulk temperature?

A

Mixing-Cup Temperature

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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)

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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

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25
Q

Arrange the following substance in terms of increasing melting point: Palmitic, Stearic, Oleic

A

Oleic, Palmitic, Stearic

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26
Q

What is the common form of nitro-glycerol?

A

Trinitroglycerin, Nitroglycerin or Nitrate Vasodilator

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27
Q

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

a) Increase (becomes more basic)

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28
Q

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.

A

Most PolarRCOOH
Least Polar- C-C

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29
Q

The range of melting point of the fatty acids.

A

saturated fatty acid- 100 to 110°C
unsaturated- 70 to 85°C

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30
Q

What happen to the enthalpy content of the real gases when it is throttled at constant temperature?

A

Stays constant

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31
Q

a set of processes performed by the living
beings that allow them to interchange MATTER and ENERGY with their environment

A

METABOLISM

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32
Q

The phase that consists of the DISINTEGRATION of
complex organic compound to release energy is known as _______

A

CATABOLISM

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33
Q

The phase that consists of the ARRANGEMENT of organic compounds from simpler compounds to store energy is called _______

A

ANABOLISM

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34
Q

What law is the PRC modernization act?

A

RA NO 8981

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35
Q

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

A

all

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36
Q

What unit operation originated in Trona Process?
a. Fractional Distillation
b. Crystallization
c. Evaporation
d. Phase Rule

A

b. Crystallization

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37
Q

Hagreave’s process is the production of ____

A

Sodium Sulfate

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38
Q

If the concentration of the reactant increases, the half life decreases, what order of the reaction is this?

A

2nd order

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39
Q

Which of the following is the reaction time is directly proportional to the concentration of the reactant?

A

Zero order

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40
Q

Which of the following process uses the MIMO system in controlling their process parameter?
a. Distillation
b. Extraction
c. Evaporation
d. Crystallization

A

a. Distillation (Evap sa isang source)

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41
Q

How is the fluctuation in the process is controlled?

A

Equipping the instrument with integral controller

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42
Q

In process control, _____ makes the process variable appear to deviate from the setpoint whether any real disturbance is at work or not.

A

Noise

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43
Q

What do you call the temperature in which the reactor condition cannot be controlled?

A

Runaway Temperature

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44
Q

Number of carbon atoms in olvanil?

A

26 (C26H43NO3)

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45
Q

Who discovered x-ray?

A

Wilhelm Conrad Roentgen

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46
Q

How many Amino acids in human protein?

A

20 amino acids. 9 of them are essential or cannot be made by the
body

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47
Q

It us an organic reaction where the unsaturated bonds of
alkenes, alkynes, or azo compounds are cleaved with ozone.

A

Ozonolysis

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48
Q

Hydrocarbon, also called alkane, any of the saturated
hydrocarbons having the general formula Cn H2n+2

A

paraffins

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49
Q

What is the center of an atom?

A

Nucleus

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50
Q

What do you call the blanket of pollutants?

A

Smog

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51
Q

Pollutant produced from coal and petroleum.

A

Sulfur dioxide is the largest. Followed by NOx and COx

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52
Q

Nearest layer of atmosphere from earth’s surface
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere

A

a) Troposphere

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53
Q

A method of sequencing amino acids in a peptide

A

Edman Degradation by Pehr Edman

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54
Q

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

a. nuclear fission

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55
Q

Formula of Red Lead

A

Pb3O4

56
Q

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)

A

c. Impossible (Unless exposed in temperatures as that of
sun and stars)

57
Q

Author of octet rule

A

Gilbert Lewis

58
Q

Iodine vapor forms iodine crystals when it touches a cold
surface. What is the reverse of the process being
described?

A

sublimation

59
Q

Notation on alkane containing Cl
a. chloro
b. chloride
c. chlorate
d. chloric

A

a. chloro

60
Q

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?

A

I. NO
II. YES
III. YES
IV. LIQUID
V. LESS DENSE

61
Q

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

A

c. remains the same

62
Q

Description of a primary and a secondary cell

A

A primary cell can be recharged while secondary cannot,
Ni-Cd is a primary cell, a dry cell is a secondary cell.

63
Q

Adolf Baeyer’s contribution in medicine, made by reacting
malonic acid and urea with a catalyst is called.

A

Barbituric acid

64
Q

Which layer of the atmosphere contains the ozone
layer?

A

Stratosphere

65
Q

Composition of acid in acid rain?
a. nitric and carbonic
b. sulfuric and carbonic
c. nitric and sulfuric

A

c. nitric and sulfuric

66
Q

How to differentiate alkane alkene and alkyne?
a. combustion on an empty beaker
b. nature of carbon and its branching
c. reaction with Br2

A

c. reaction with Br2

67
Q

Which of the ff. has a larger ionic nucleus? Na+ or Na?
a. Both
b. Na+
c. Na
d. none of these

A

c. Na

68
Q

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

A

B. Decrease

69
Q

Formula of alar

A

C6H12N2O3

70
Q

Particle with the same mass as proton

A

neutron

71
Q

Polymer used in bullet proof vest
a. linear polyethylene
b. polyacrylonitrile
c. polycarbonate
d. polymethylacrylate

A

a. linear polyethylene

72
Q

Other term of earth wax

A

ozocerite

73
Q

Other name of Yamatake system (process automation -
DCS or Distributed Control System)
a. android
b. windows
c. azbil

A

c. azbil

74
Q

What is used in ultrasonic flow meters

A

Doppler

75
Q

Which of the following is not dependent on temperature
and wavelength?
a. black body
b. gray body
c. plasma
d. moving body

A

B) Gray body

76
Q

Electronic noise inside an electric conductor which is
independent of applied voltage
a. shot noise
b. Johnson noise
c. white noise

A

b. Johnson noise

77
Q

Difference between measured value and set point
a. deviation
b. error
c. oscillation

A

b. error

78
Q

pH or Normal rain and acid rain

A

Normal rain (5.0-5.5)
Acid rain (4.0)

79
Q

pH of blood

A

7.35-7.45

80
Q

Who discovered deuterium?

A

Harold C. Urey

81
Q

What is the common form of nitro-glycerol?

A

Nitroglycerin

82
Q

A bond in which electrons are shared between elements having a difference in electronegativity of between 0.5 and ~2.0

A

polar covalent bond

83
Q

Polymer use in bullet proof vest

A

Linear Polyethylene

84
Q

How do you differentiate electromagnetic radiation?
a. Wavelength
b. Photons
c. Frequency
d. Energy

A

d. Energy

85
Q

Who discovered resonance?
a. Alfred Nobel
b. Linus Pauling
c. Immanuel/Emmanuel?
d. Le Chatelier

A

b. Linus Pauling

86
Q

specific groups of atoms or bonds within molecules that
are responsible for the characteristic chemical reactions
of those molecules

A

functional group

87
Q

Product of reaction between acyl halide and an alcoho

A

Ester

88
Q

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?

A

Genetically enhance plants to prolong shelf life

89
Q

What is the first step in utilizing proteins?

A

Hydrolysis

90
Q

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.

A

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
Q

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

A

b. Treat water supply

92
Q

________ are small DNA molecules within a cell that are
physically separated from a chromosomal DNA and can
replicate independently

A

Plasmids

93
Q

The Nobel Prize for radioactivity discovery was shared
between Curie and Roentgen. Who coined the word
“serendipity” in 1754?

A

Horace Walpole

94
Q

What is the chemical used in sunblock?

A

ZnO

95
Q

Ketone and aldehyde in alcohol will form?

A

Acetals/Ketals

96
Q

What is the other name of aspirin?

A

acetylsalicylic acid

97
Q

Formation of glucose from non-carbohydrate sources

A

gluconeogenesis

98
Q

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

A

o It depends on the carbon dioxide

99
Q

Who discovered vulcanization?

A

Charles Goodyear

100
Q

A bond in which electrons are shared between elements having a difference in electronegativity of between 0.5 and 2

A

Polar Covalent Bond

101
Q

Regeant used in Edman Degradation?

A

Ninhydrin

102
Q

group of sound with many non harmonic frequency components of varying amplitudes and random phase

A

Noise

103
Q

A set of independent functions which are solutions to a given differential equation

A

Eigen Function

104
Q

_______ 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.

A

Dopamine

105
Q

Raoult’s Law is for what kind of solution

A

Dilute Solution

106
Q

What is the product form when H in carboxylic acid is replaced by an alkyl group?

A

Esters

107
Q

Method used to purify salt water in other areas?

A

Reverse Osmosis (for desalination)

108
Q

What block in periodic table has the most number of element?

A

d-block

109
Q

What property will change in an element during oxidation?

A

Charge

110
Q

What is the driving force in water cycle?
A. Sun
B. Water Tides
C. Gravity

A

Sun

111
Q

Which is bigger Cation or Anion?

A

Ans. ANION - neutral atom that gained electron

CATION- Losses electron

112
Q

Electron that participates in bonding?

A

valence electron

113
Q

Zoological Question

Why trouts like to live in cold water?

A

Trouts are cold blooded.

Their metabolism slows down in cold water than in warm water

114
Q

What is the unit of avogadros number?

A

Atoms/mol

115
Q

Which of the ff. involves a chemical reaction?
A. Reaction of Nonmentals
B. Oxidation Reduction

A

B. Oxidation Reduction

116
Q

Differentiate electromagnetic waves and radiation?
A. Wavelength
B. Photons
C. Frequency
D. Energy

A

B. Photons

117
Q

Process of inventing new genetic information into existing cells inorder to modify a specific organism for the purpose of changing its characteristics

A

Genetic Engineering

118
Q

Plays a major role in large scale production of biochemical products by applying the principles of engineering to the activity of living cells

A

Biochemical Engineering

119
Q

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

A

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
Q

What will you put in the thermocouple to increase the accuracy of the reading?

A

Temperature sensors

121
Q

What instrument is used in measuring temperature without contact with the fluid or vessel?

A

Infrared thermometer / radiation thermometer

122
Q

Kind of flow that is imaginary?
A. One dimensional
B. Turbulent
C. Multi-dimensional
D. Viscous

A
123
Q

Chemical Name of Sylvite

A

KCl

124
Q

Biochemical reaction involving single substrate?

A

Michaelis Menten

125
Q

What happen to the pressure when a balloon is placed in liquid nitrogen ?
A. Low
B. High
C. No change

A

A. Low
The baloon will shrink

126
Q

TRUE or FALSE

The higher the Ka, the stonger the acid while the higher the pKa the weaker the acid

A

TRUE

127
Q

Plutonium 238 is used in heart surgery as what?

A

Pacemaker

128
Q

Americium 241 is used as?

A

Smoke detectors

129
Q

What makes plastics or polymer biodegradable?

A

Hydrophilicity

130
Q

Who proposed the Ideal liquid equation?

A

Clayperon

131
Q

By product of Pomace that is also used in the production of Potassium tartrate?

A

Argol

132
Q

What type of cement that is unique because it contains tricalcium silicate and bicalcium silicate?

A

Portland cement

133
Q

Process in which wastewater is subjected to air?

A

Activated sludge process

134
Q

The minimum amount of energy require to start a chemical reaction?

A

Activation Energy

135
Q

States that when stress is applied to a system in a state of equilibrium the system reacts in a way to reduce the stress

A

Le Chatelier’s Principle

136
Q

Where was oil shark recovered?

A

Kerogen

CHE BOARD EXAM (34 decks)

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