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Letchaysaybeejen > Past Boards Concept - Day 1 > Flashcards

Past Boards Concept - Day 1 Flashcards

1
Q

The theory of resonance was developed by ________ in order
to further explain the bonding structures of molecules or
ions not covered by Lewis Octet Rule

A. Hans Fischer
B. Linus Pauling
C. Victor Grignard
D. Paul Sabatier

A

B. Linus Pauling

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2
Q

Generation of glucose from certain non-carbohydrate carbon
precursors during prolonged starvation.

A. Glycogenolysis
B. Glycolysis
C. Gluconeogenesis D. Glycogenesis

A

C. Gluconeogenesis

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3
Q

It is used as a precursor of vinyl chloride

A. Ethylene
B. Ethene
C. Propane
D. Propylene

A

A. Ethylene

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4
Q

A diamond structure is due to

A. Ionic bonding
B. Hydrogen bonding
C. Strong covalent bonding
D. Metallic bonding

A

C. Strong covalent bonding

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5
Q

Produced when hydrogen is removed from a benzene ring

A. Aryl
B. Phenyl
C. Hydroxyl
D. Benzyl

A

B. Phenyl

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6
Q

Produced when hydrogen is removed from an aromatic
functional group

A. Aryl
B. Phenyl
C. Hydroxyl
D. Benzyl

A

A. Aryl

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7
Q

Range of electronegativity

A. -1 to 1
B. 2 to 5
C. 0 to 4
D. 1 to 5

A

A. -1 to 1

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8
Q

Magnesium reacts with ______ to produce magnesium nitride
and hydrogen gas

A. Nitrogen
B. Nitrogen dioxide
C. Ammonium
D. Ammonia

A

D. Ammonia

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9
Q

Most common coagulant used for water purification

A. Ferric Sulphate B. Ferric Chloride
C. Potash Alum
D. Liquid Alum

A

D. Liquid Alum

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10
Q

What does MSDS stand for

A. Material Specification
Data Sheet
B. Material Safety Data Sheet
C. Machine Safety Data Slip
D. Machine Safety Data Sheet

A

B. Material Safety Data Sheet

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11
Q

Sigma bonds per carbon in benzene

A. 1
B. 2
C. 3
D. 4

A

C. 3

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12
Q

Predominant organic acid found in apples

A. Malic acid
B. Oxalic acid
C. Tartaric acid
D. Benzoic acid

A

A. Malic acid

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13
Q

Number of C atoms in olvanil

A. 23
B. 26
C. 29
D. 32

A

B. 26

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14
Q

The number of amino acids in human protein

A. 25
B. 23
C. 20
D. 19

A

C. 20

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15
Q

Reaction wherein unsaturated bonds are cleaved with
ozone

A. Ozonalysis
B. Ozotropic reactions
C. Ozonolysis
D. Ozeotropic reactions

A

C. Ozonolysis

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16
Q

Method for sequencing of amino acids by sequentially
removing one residue at a time from the amino end of a
peptide

A. Hydrolysis
B. Mass Spectrometry
C. Edman Degradation
D. Beckman-Spinco Analysis

A

Edman Degradation

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17
Q

Ratio of the mass of the sun to the earth

A. 3,000
B. 33,000
C. 333,000
D. 3,333,000

A

C. 333,000

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18
Q

Ratio of the diameter of the sun to the earth

A. 107
B. 108
C. 109
D. 110

A

C. 109

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19
Q

Formula of red lead

A. Pb2O
B. PbO
C. Pb3O4
D. Pb2O5

A

C. Pb3O4

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20
Q

Discovered Deuterium

A. Robert Boyle
B. Pierre Janssen
C. Henry Cavendish D. Harold Urey

A

D. Harold Urey

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21
Q

Alar

A. C6H12N2O3
B. C16H20NO3
C. C7H24N3Cl
D. C10H12NOCl

A

A. C6H12N2O3

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22
Q

When Ca2+ undergoes the flame test, what color does it
produce?

A. Crimson red
B. Yellowish green
C. Purple/lilac
D. Brick red

A

D. Brick red

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23
Q

Organic reaction that converts an alcohol into an
alkyl chloride

A. Baeyer
B. Appel
C. Finkelstein
D. Bellstein

A

B. Appel

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24
Q

Chemical formula of Rochelle’s Salt

A.
KNaC4H4O64H2O
B.
Na2C5H7O22H2O
C. Pb2CO3Cl2
D. PbC2O4Cl

A

A.
KNaC4H4O6*4H2O

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25
Q

Major component of lecithin

A. Phosphatidine
B. Phosphatidylcholine
C. Sterols
D. Phosphatidylethanolamine

A

B. Phosphatidylcholine

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26
Q

Invented vulcanized rubber

A. Edouard Michelin
B. John Boyd Dunlop
C. Charles Goodyear
D. William F. O’Neil

A

C. Charles Goodyear

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27
Q

Chemical formula for angelic acid

A. C3H6OCl
B. C2H3N2Cl
C. C6H10Cl2
D. C5H8O2

A

D. C5H8O2

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28
Q

Polymer found in bulletproof vest

A. PVC
B. Nylon
C. Linear Polyethylene
D. Teflon

A

C. Linear Polyethylene

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29
Q

All of these are indicators for EDTA except:

A. Eriochrome Black T
B. Solochrome
C. Muroxide
D. Calmagite

A

C. Muroxide

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30
Q

Taurine

A. C3H9NO2
B. C4H8SO3
C. C2H7NO3S
D. C5H10NO2S

A

C. C2H7NO3S

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31
Q

Distance of earth to farthest galaxy in billion light
years

A. 12
B. 14
C. 13
D. 15

A

C. 13

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32
Q

Arrange the following compounds in increasing acid
strength:

I. Phenol
II. Alcohol
III. Carboxylic acid

A. II-I-III
B. III-I-II
C. I-II-III
D. II-III-I

A

A. II-I-III

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32
Q

The difference between the actual property value of a
solution and the value it would have as an ideal solution
at the same T and P and composition is called

A. Residual
B. Excess
C. Partial
D. Gibbs free energy

A

B. Excess

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32
Q

Formula of 11-tetradecenyl acetate

A. C15H34O
B. C15H30O
C. C16H30O2
D. C16H34O2

A

C. C16H30O2

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33
Q

Oxidation number of Cr in CrF6
3+

A. 3
B. 0
C. -3
D. -6

A

A. 3

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34
Q

Isoelectronic with Xe

A. Mg2+
B. S2-
C. K+
D. I-

A

D. I-

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35
Q

Match the following element to the correct application

I. Co-60
II. Th-201
III. Tritium
IV. Hg-197

A. Kidney scan
B. Cancer therapy
C. Measure H2O content in body
D. Heart scan

A. IA-IIB-IIIC-IVD
B. IVB-IC-IIA-IIID
C. IB-IVA-IID-IIIC
D. IIIA-IIC-ID-IVB

A

C. IB-IVA-IID-IIIC

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36
Q

Number of double bonds in geraniol

A. 3
B. 2
C. 1
D. 0

A

B. 2

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37
Q

Also known as saturated aliphatic hydrocarbon

A. Olefin
B. Paraffin
C. Alkene
D. Arene

A

B. Paraffin

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38
Q

What happens to change of internal energy (U) when the work is done by the system during the adiabatic expansion of ideal gas?

A. Increases
B. Decreases
C. Stays the same D. Not enough information

A

B. Decreases

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38
Q

Common name of calcium carbonate

A. Quartz
B. Dolomite
C. Chalk
D. Cream of tartar

A

C. Chalk

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39
Q

Chemical formula of laughing gas

A. NO
B. NO2
C. N2O
D. NO3

A

C. N2O

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39
Q

Which is not a main component of cement?

A. Fe
B. Ni
C. Si
D. Al

A

B. Ni

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40
Q

Nearest layer of atmosphere from earth’s surface

A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere

A

A. Troposphere

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40
Q

Scientist who won the Nobel Peace Prize for nuclear
fission

A. Otto Stern
B. Otto Hahn
C. Enrico Fermi
D. Paul Karrer

A

B. Otto Hahn

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41
Q

Which of the following statements is true based on
Classical Physics & Quantum Theory

A. Robert Bunsen proposed
that energy like matter
is discontinuous

B. Quantum theory places no
limitation on the amount
of energy that a system
may possess

C. The energy of a quantum
of electromagnetic
radiation is proportional
to the frequency of the
radiation

D. None of the choices

A

C. The energy of a quantum
of electromagnetic
radiation is proportional
to the frequency of the radiation

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42
Q

Person behind carbon dating method

A. Gilbert Plass
B. Willard Libby
C. Charles Keeling D. Wallace Broecker

A

B. Willard Libby

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43
Q

Where is the ozone layer found?

A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere

A

B. Stratosphere

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44
Q

Solid layer of earth’s crust

A. Mantle
B. Asthenosphere
C. Lithosphere
D. Outer core

A

C. Lithosphere

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45
Q

First natural dye to be produced synthetically

A. Melanin
B. Carotenoid
C. Alizarin
D. Indigofera

A

C. Alizarin

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46
Q

Internal energy is composed of all energy in the
system except:

A. Enthalpy
B. Free energy
C. Heat of fusion
D. Kinetic and potential energy

A

D. Kinetic and potential energy

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47
Q

Known for the discovery of spontaneous radioactivity

A. Ernest Rutherford
B. Marie Curie
C. Henri Becquerel D. Wilhelm Roentgen

A

C. Henri Becquerel

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48
Q

Who coined the term “radioactivity”?

A. Ernest Rutherford
B. Marie Curie
C. Henri Becquerel D. Wilhelm Roentgen

A

B. Marie Curie

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49
Q

The atomic mass unit (amu) is equal to ______ of the
mass of an atom of Carbon-12

A. One-half
B. One-fourth
C. One-sixth
D. One-twelvth

A

D. One-twelvth

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49
Q

Discovered the elements Polonium and Radium

A. Ernest Rutherford
B. Marie Curie
C. Henri Becquerel D. Wilhelm Roentgen

A

B. Marie Curie

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50
Q

This law explains electromagnetic induction as the
interaction of a magnetic field with an electric circuit
to produce electromotive force (emf)

A. Maxwell’s Law
B. Kirchoff’s Law
C. Faraday’s Law
D. Boltzmann’s Law

A

C. Faraday’s Law

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51
Q

Also known as olefins

A. Alkanes
B. Alkenes
C. Alkynes
D. Aromatics

A

B. Alkenes

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52
Q

Component of chili peppers responsible for the
burning sensation

A. Theobromine
B. Quinine
C. Capsaicin
D. Castoreum

A

C. Capsaicin

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53
Q

Another name for bulk temperature

A. Surface temperature
B. Adiabatic temperature
C. Steady state temperature
D. Mixing-cup temperature

A

D. Mixing-cup temperature

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54
Q

Wohler’s experiment that destroyed the Vital Force Theory

A. Using electrolysis to
isolate elemental K, Na, and Ca
B. Heating of NH4Cl with AgCN
to form urea
C. Separating a racemic
mixture of two
enantiomers by sorting
individual crystals
D. Mixing Xe and PtF6 leading
to the first synthesis of
a noble gas compound

A

B. Heating of NH4Cl with AgCN
to form urea

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55
Q

Set of processes performed by living beings that
allow them to interchange matter and energy with their
environment

A. Metabolism
B. Cytosis
C. Glycolysis
D. Anabolism

A

A. Metabolism

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56
Q

Alfred Baeyer produced this compound by combining malonic acid and urea

A. Thioesteric acid B. Butyric acid
C. Valeric acid
D. Barbituric acid

A

D. Barbituric acid

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57
Q

Properties of 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 temperature &
atmospheric conditions?
V. Is it denser than water?

A. No, yes, yes, liquid, more dense

B. Yes, yes, yes, liquid,
more dense

C. Yes, yes, yes, liquid, less dense

D. No, yes, yes, liquid, less dense

A

D. No, yes, yes, liquid, less dense

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58
Q

The only natural amino acid that has no chiral center
is

A. Cysteine
B. Tryptophan
C. Glycine
D. Proline

A

C. Glycine

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59
Q

When a foreign substance is injected in a rabbit, how long does it take to find antibodies against the foreign
substance in the rabbit serum?

A. Less than 1 week B. Exactly 1 week
C. 1 to 2 weeks
D. More than 2 weeks

A

C. 1 to 2 weeks

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60
Q

Which amino acid has the highest percentage nitrogen?

A. Glutamic acid
B. Arginine
C. Tyrosine
D. Phenylalanine

A

B. Arginine

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61
Q

Above the stratosphere, the concentration of ozone and other gases is low, and the temperature decreases with
increasing altitude

A. Troposphere
B. Ionosphere
C. Mesosphere
D. Stratosphere

A

C. Mesosphere

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62
Q

What compound is a ketone but is not a carbohydrate but is useful commercially?

a. ethyl alcohol
b. glucose
c. Benzaldehyde
d. acetone

A

d. acetone

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63
Q

Which element is difficult to remove from sewage and wastewater and at the same time, it
contributes to bacterial and algae overgrowth in freshwater?
a. oxygen
b. lead
c. carbon
d. nitrogen

A

d. nitrogen

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64
Q

There are approximately 20 amino acids in human protein. Name 3 essential amino acids:

a. Proline, glutamine, asparagine
c. Arginine, lysine, phenylalanine
b. Aspartic acid, glutamic acid, serine
d. Glycine, arginine, glutamic acid

A

c. Arginine, lysine, phenylalanine

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65
Q

_______ is the conversion of molecular nitrogen into nitrogen
compounds.

a) Nitrogen fixation c) Nitrite reduction
b) Denitrification
d) Industrial fixation

A

a) Nitrogen fixation

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65
Q

How do two free radicals react when they encounter each other?

  1. They unite to form double bonds
  2. They unite to form double or triple bonds
  3. They unite with covalent bond formation
  4. They repel each other
A
  1. They unite with covalent bond formation
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66
Q

Above the stratosphere, the concentration of ozone and other gases
is low, and the temperature decreases with increasing altitude

a) Troposphere
c) mesosphere
b) Stratosphere
d) ionosphere

A

c) mesosphere

67
Q

The layer of the atmosphere that contains about 80 percent of the
total mass of air and practically all of the atmosphere’s water vapor.

a) Troposphere
c) mesosphere
b) Stratosphere
d) ionosphere

A

a) Troposphere

68
Q

Above the troposphere, is the ________, which consists of nitrogen,
oxygen, and ozone. The air temperature rises with altitude.

a) Troposphere
c) mesosphere
b) Stratosphere
d) ionosphere

A

b) Stratosphere

69
Q

The incoming streams of solar protons and electrons are oriented by
Earth’s magnetic field so that most auroral displays occur in
doughnut-shaped zones about 2000km in diameter centered on the north
and south poles. __________ is the name given to his phenomenon in
the Northern Hemisphere.

a) Aurora borealis c) both a and b
b) Aurora australis d) none of these

A

a) Aurora borealis

69
Q

An international treaty -________- was signed by most industrialized
nations in 1987, setting targets for cutbacks in CFC production and
the complete elimination of these substances by the year 2000.

a) Stockholm Convention
c) Kyoto Predict
b) Kyoto Protocol
d) Montreal Protocol

A

d) Montreal Protocol

70
Q

A curie corresponds to _______ disintegrations of radioactive nuclei
per second

a) 3.70 x 10^7
c) 3.70 x 10^9
b) 3.70 x 10^8
d) 3.70 x 10^10

A

d) 3.70 x 10^10

70
Q

Extracting the metals often entails _________-that is, heating the
metal sulfide in air to form the metal oxide and sulfur dioxide.

a) Galvanizing
c) Smelting
b) Vulcanizing
d) Mining

A

c) Smelting

71
Q

_______ is a rather disagreeable-smelling liquid used as a
preservative for laboratory specimens.

a) Acetaldehyde
c) Methanal
b) Methanol
d) Valeraldehyde

A

c) Methanal

72
Q

Reactions proceeds spontaneously at low temperatures. At high temperatures, the reverse reaction becomes spontaneous.

a) + Δ H and + ΔS
c) - Δ H and + ΔS
b) - Δ H and – ΔS
d) + Δ H and - ΔS

A

b) - Δ H and – ΔS

73
Q

Geometrically, ________ is the most symmetrical molecule known.

a) Buckminsterfullerene
c) fullerenes
b) Graphite
d) Buckytubes

A

a) Buckminsterfullerene

74
Q

What determines the degree of completeness of a reaction?

a) catalyst
c) rate of reaction
b) intimacy of contact
d) equilibrium constant

A

d) equilibrium constant

75
Q

What is the substance called that causes an alteration of the
speed of a chemical reaction?

a) variable
c) catalyst
b) gas
d) equilibrium constant

A

c) catalyst

75
Q

What substance does not have catalytic capability, but does increase
the effectiveness of a catalyst?

a) enzyme
c) anti-catalyst
b) promoter
d) true constant

A

b) promoter

76
Q

Who first proposed the atomic theory?

a) John Dalton
c) Lord Kelvin
b) Julius Robert
d) William Thomson

A

a) John Dalton

76
Q

What is the temperature at which the vapor pressure of a liquid
slightly exceeds the pressure of the atmosphere above the liquid?

a) absolute zero
c) Kelvin
b) boiling point
d) melting point

A

b) boiling point

77
Q

What theory states that equal volumes of different gases contain the
same number of molecules when compared under the same conditions.

a) Quantum Theory c) Molecular Law
b) Kinetic Theory
d) Avogadro’s Law

A

d) Avogadro’s Law

77
Q

Who first came up with the periodic table?

a) Amedeo Avogadro
c) Charles Darwin
b) Dmitri Mendeleev
d) Isaac Newton

A

b) Dmitri Mendeleev

78
Q

What is the number of the element on the Periodic Table called?

a) periodic number c) quantum number
b) element number d) atomic number

A

d) atomic number

78
Q

Who invented the X-ray?

a) Wilhelm Conrad Roentgen
c) Pierre Curie
b) Marie Curie
d) Ernest Rutherford

A

a) Wilhelm Conrad Roentgen

79
Q

Who’s theory proposed that electrons are arranged in shells, or quantum levels, at a distance from the nucleus?

a) Rutherford
c) Bohr
b) Newton
d) Davis

A

c) Bohr

80
Q

What are chemical changes in organic substances caused by the action
of enzymes called?

a) reaction
c) enzymiphication
b) oxidation
d) fermentation

A

d) fermentation

80
Q

What was Melvin Calvin was known for his study of?

a) x-rays
c) magnetics
b) photosythesis
d) boiling point

A

b) photosythesis

81
Q

Who was key to developing the valence theory?

a) Melvin Calvin
c) Sir Edward Franklin
b) Henry Dow
d) Humphry David

A

c) Sir Edward Franklin

81
Q

25) What compounds are formed by the reaction of acids and alcohols?

a) ethers
c) esters
b) enzymes
d) bases

A

c) esters

82
Q

Who invented vulcanization for the rubber industry?

a) Charles Goodyear
c) Robert Michelin
b) James Firestone d) Albert Brookstone

A

a) Charles Goodyear

83
Q

What process combines rubber and sulfur at a high temperature?

a) fulmination
c) fermentation
b) vulcanization
d) distillation

A

b) vulcanization

84
Q

Who won the 1944 Nobel Prize in chemistry for his work in nuclear
fission?

a) Fritz Straussmann
c) Otto Hahn
b) Joseph Lussac
d) Johann Glauber

A

c) Otto Hahn

85
Q

Who invented the Carbon-14 dating method?

a) Irving Langmuir c) August Hofmann
b) Williard Libby
d) Otto Hahn

A

b) Williard Libby

86
Q

What is the ability of a solid substance to resist abrasion and
surface deformation called?

a) hardness
c) conductivity
b) softness
d) tensile strength

A

a) hardness

86
Q

What is the resistance to breakage called?

a) hardness
c) malleability
b) elasticity
d) tensile strength

A

d) tensile strength

87
Q

What is the ability to return to the original shape after being
deformed called?

a) hardness
c) malleability
b) elasticity
d) tensile strength

A

b) elasticity

87
Q

What is the ability to be shaped called?

a) hardness
c) malleability
b) elasticity
d) tensile strength

A

c) malleability

88
Q

Oxidation of which of the following compounds can lead to an
aldehyde?

a. primary alcohol b. secondary alcohol
c. tertiary alcohol
d. ether

A

a. primary alcohol

89
Q

Oxidation of which of the following compounds can lead to ketone?

a. primary alcohol b. secondary alcohol
c. tertiary alcohol
d. ether

A

b. secondary alcohol

90
Q

Hydrolysis of an ester leads to two compounds. Which of the
following pairs compounds is formed from such a hydrolysis?

a. An alcohol and an aldehyde
c. An alcohol and a carboxylic acid
b. Two alcohols
d. A ketone and a carboxylic acid

A

c. An alcohol and a carboxylic acid

90
Q

Which of the following compounds would you expect to be the most
soluble in water?

a. CH3CH2CH2CH2CH2CH2CH2CH3
c. CH3CH2CH2CH2CH2CH2CH2OH
b. CH3CH2CH2OH d. CH3CH2CH2-O-CH2CH2CH3

A

b. CH3CH2CH2OH

91
Q

Which of the following is the best definition of the chemical
nature of soap?

a. A soap is a very long molecule.
b. A soap is a long chain carboxylic acid.
c. A soap is an ester of glycerol and a long chain carboxylic acid.
d. A soap is a salt of a long chain carboxylic acid.

A

d. A soap is a salt of a long chain carboxylic acid.

91
Q

The molecule among those in the following list that can be
classified as an amide is

a. CH3NH2
b. CH3CONH2
c. CH3CHO
d. CH3COOH

A

b. CH3CONH2

91
Q

Which of the following amino acids has sulfur in the R group?

a. Serine
b. Cysteine
c. Asparagine
d. Tyrosine

A

b. Cysteine

92
Q

Triglycerides which are solids or semisolids at room temperature
are called:

a. oil
b. Fat
c. Steroid
d. Cholesterol

A

b. Fat

92
Q

An act to Control Toxic Substances and Hazardous and Nuclear
Wastes providing penalties for violation thereof

a. RA 8749
b. RA 9003
c. RA 9275
d. RA 6969

A

d. RA 6969

93
Q

The following are correctly named except

a) 3-ethylpentane
c) N-methylbutanamide
b) p-dichlorobenzene
d) 5-hexanone

A

d) 5-hexanone

93
Q

The difference between the actual property value of a solution and
the value it would have as an ideal solution at the same T and P and
composition is called

a. Residual
b. Excess
c. Partial property d. Gibbs free energy

A

b. Excess

93
Q

Among the following processes, all of the following will produce an
alkane from an alkyl halide except

a) Wurtz Synthesis c) Reduction with Zn
b) Hydrogenation d) Corey-House Synthesis

A

b) Hydrogenation

94
Q

Aromatic compounds are characteristics of

a) Electrophilic substitution
c) Nucleophilic substitution
b) Electrophilic addition
d) Electrophilic addition

A

a) Electrophilic substitution

94
Q

Delocalization of pi electrons

a) Rearrangement c)hyperconjugation
b) isomerism d)resonance

A

d)resonance

95
Q

Hydration of alkynes yields

a) epoxide
b) ketone
c) alcohol
d) ether

A

b) ketone

95
Q

The sequence of steps to produce o-nitrobenzoic acid from benzene
is

(1) Friedel-Crafts Alkylation
(2) Nitration
(3) Oxidation

a) 123
b) 132
c) 213
d) 231

A

a) 123

96
Q

Markovnikoff’s addition of HBr to alkynes dominantly produces

a) Geminal dihalide c) tetrahalide
b) Vicinal dihalide d) halohydrin

A

a) Geminal dihalide

97
Q

Ozonolysis of alkenes gives a/an

a) aldehydes
b) alcohol
c) ether
d) ester

A

a) aldehydes

98
Q

Which of the following reactions will yield an alcohol from alkenes?

a) Oxymercuration-Demercuration
c) Hydroxylation
b) Hydroboration-Oxidation
d) all of the above

A

d) all of the abov

99
Q

Which of the following compounds has the highest boiling point?

a) N-pentane
b) isopentane
c) neopentane
d) isobutene

A

a) N-pentane

99
Q

A sequence in which a C=C double bond is oxidatively converted to two
carbonyl groups through sequential treatment with O3, followed by Zn in acetic
acid

a) Oxidation
c) Oxymercuration-Demercuration
b) Ozonolysis
d) Hydroboration-Oxidation

A

b) Ozonolysis

100
Q

An addition reaction initiated by attack by an electron-deficient reagent
(an electrophile), often a proton from a hydronium ion

a) Electrophilic Addition
c) Oxidation
b) Nucleophilic Addition
d) Ozonolysis

A

a) Electrophilic Addition

100
Q

A reaction sequence used to achieve anti-Markovnikov hydration of an
alkene; initiated by concerted syn addition of borane, followed by oxidation
with basic hydrogen peroxide

a) Oxidation
c) Oxymercuration-Demercuration
b) Ozonolysis
d) Hydroboration-Oxidation

A

d) Hydroboration-Oxidation

101
Q

What is the common name of this compound – C6H5OCH3?

a) Aniline
c) Cumene
b) Styrene
d) Anisole

A

d) Anisole

101
Q

The influence of mixing of s and p orbitals; the greater the fraction of
s character of the hybrid orbital, the more electronegative is the atom

a) Hybridization
c) Hybridization Effect
b) Hybrid Orbitals d) Hybrid

A

c) Hybridization Effect

102
Q

A homolytic substitution of halogen for hydrogen, often in an alkane

a) Nucleophilic substitution
c) Electrophilic aromatic substitution
b) Free radical substitution
d) Electrophilic addition

A

b) Free radical substitution

103
Q

The alkene formed is the one that is more alkyl substituted.

a) Markovnikoff’s Rule
c) Saitsev’s Rule
b) Hoffman’s Rule d) Huckel’s Rule

A

c) Saitsev’s Rule

104
Q

The final product of hydration of an alkyne is a/an __________.

a) Enol
b) Alkene
c) Ketone
d) Alcohol

A

c) Ketone

105
Q

________ is a method of sequencing amino acids in a peptide.
In this method, the amino-terminal residue is labeled and cleaved from
the peptide without disrupting the peptide bonds between other amino
acid residues.

a) Markovnikov Degradation
c) Lewis Sequencing
b) Edman Degradation
d) Hall reaction

A

b) Edman Degradation

106
Q

What are sigmatropic rearrangements in organic reactions?

A

They are different from electrolytic reactions wherein a movement of a sigma bond with a simultaneous rearrangement of the pi system does not occur

107
Q

How to differentiate alkane alkene and alkyne?

A

reaction with Br2

107
Q

how do two free radicals react when they encounter each other?

a. They unite to form double
bonds
b. They unite to form double or triple bonds
c. They unite with covalent bond formation
d. They repel each other

A

c. They unite with covalent bond formation

108
Q

Oxidation number of O in Na2SO4

A

-2

109
Q

Which of the following lipis contain a ceramide unit?

A

Sphingomyelins

110
Q

Which of the following acidic group is present in taurine?

A

Which of the following acidic group is present in taurine?

111
Q

color change of litmus paper when basic

A

blue

112
Q

which among the compounds na di mo mahahanap ang C, N, H, and O in a single compound.

A

ascorbic acid

113
Q

Author of octet rule

A

Gilbert Lewis

114
Q

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

A

sublimation

114
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

no, yes, yes, liquid, less dense

115
Q

Characteristics of elements under group 1A

A

Has 1 electron on its outermost energy level

115
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

116
Q

Formula of Red Lead

A

Pb3O4

117
Q

Can oxygen be synthesized from nitrogen?

a. Yes, by the bombardment of alpha particles
b. Yes, by electron capture
c. Impossible

A

c. Impossible

Unless exposed in temperatures as that of sun and stars

118
Q

How does alpha, beta and gamma particle affect the mass number of an atom?

A

4,0,0

119
Q

Notation on alkane containing Cl

a. chloro
b. chloride
c. chlorate
d. chloric

A

a. chloro

119
Q

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

A

sublimation

120
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

121
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.

122
Q

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

A

Barbituric acid

122
Q

Composition of acid in acid rain?

a. nitric and carbonic
b. sulfuric and carbonic
c. nitric and sulfuric

A

c. nitric and sulfuric

123
Q

Which of the ff has a higher heat of combustion on a gram per gram basis if Hf is 237 kj/mol and 532 kj/mol for methane and propane respectively?

A

methane

124
Q

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

A

c. reaction with Br2

124
Q

Discovered Helium

A

Ramsay and Travers

125
Q

Who theorized stars collapsing into blackhole as it increases entropy

A

Hawking

125
Q

pKa = 2.1 What type of acid?

A

Strong acids (periodic table pka<1)

125
Q

How many different tetrapeptides 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?

A

256, 160,000

126
Q

Most oxidized form of nitrogen

A

Nitrates (NO3-)

127
Q

Which of the following acidic group is present in taurine?

A

Sulfonic acid

127
Q
A
128
Q
A
128
Q
A
129
Q

gwapa c roms, chery, czari

A

false

129
Q
A
129
Q
A
129
Q
A
130
Q
A
130
Q
A
130
Q
A
131
Q
A
131
Q
A
131
Q
A
131
Q
A
132
Q
A
132
Q
A
132
Q
A

Letchaysaybeejen (10 decks)

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