Chemistry for Engineers

Question 1

A traveler is exploring various locations in the Philippines. During one of her journeys, she realized that she forgot to boil the eggs beforehand. She knows that the average time to boil an egg, under 1 bar, is 3 minutes. If she can boil all of the eggs at the same time, where should she boil the eggs if she can only stop in each location for no more than 3 minutes?
A: Jaro, Iloilo
B: Mandaluyong, Metro Manila
C: Tagum, Davao
D: Cabanatuan, Nueva Ecija

Answer 1

A

Question 2

What is the empirical formula of the Human DNA?
A:C31H52O34N18P6
B:C37H46O21N10P7
C:C34H55O36N19P2
D:C39H50O22N15P3

Answer 2

D

Question 3

Which among the following polymers is the most suitable in creating the most effective bulletproof vest?
A: Polymethacrylate Fiber
B: Polyamide Fiber
C: Polycarbonate Fiber
D: Polyethylene Fiber

Answer 3

D

Question 4

To which subatomic particle does each statement refer to:
(a.) Has a positive charge
(b.) Cannot be found inside the nucleus
(c.) Has the smallest mass
(d.) Has a neutral charge
A: Electron, Neutron, Electron, Proton
B: Proton, Electron, Electron, Neutron
C: Neutron, Proton, Neutron, Electron
D: Proton, Electron, Neutron, Proton

Answer 4

B

Question 5

Which among the following statements regarding Classical Physics and Quantum Theory is TRUE?
I – Robert Bunsen proposed that Energy, like matter, is discontinuous. II – Quantum Theory places no limitation on the amount of energy that a system may possess.
III – The energy of a quantum of electromagnetic radiation is proportional to the frequency of the radiation.
A:I,II B:II,III C: II only D. III only

Answer 5

D

Question 6

What intermolecular forces does CH3CHOHCH3 have?
A: Hydrogen Bonding only
B: London Forces and Hydrogen Bonding C: Dipole-Dipole Forces and Hydrogen Bonding
D: London Forces, Dipole-Dipole Forces, and Hydrogen Bonding

Answer 6

D

Question 7

What intermolecular forces does CH3CHOHCH3 have?
A: Hydrogen Bonding only
B: London Forces and Hydrogen Bonding C: Dipole-Dipole Forces and Hydrogen Bonding
D: London Forces, Dipole-Dipole Forces, and Hydrogen Bonding

Answer 7

D

Question 8

How many water molecules can attach to methanol via hydrogen bonding?

Answer 8

3

Question 9

Arrange the following substances in order of increasing magnitude of London Forces: GeCl4, SiCl4, and CCl4.
A: GeCl4 < CCl4 < SiCl4
B: CCl4, GeCl4 <SiCl4
C: CCl4 < SiCl4 < GeCl4
D: SiCl4, GeCl4 < CCl4

Answer 9

C

Question 10

Which among the following substances has the highest surface tension?
A:CCl4
D:NOTA
B:CH3OH
C:CH3CH2OCH2CH3

Answer 10

B

Question 11

Determine whether the following statements are TRUE or FALSE.
(a.) The internal energy of a system comprises that of the energy of every single microscopic particle that makes up that system
(b.) Heat and work can be conserved in a system by distributing it evenly amongst the systems constituents
(c.) delta U being equal to the summation of heat and work is an interpretation of the First Law of Thermodynamics
(d.) delta H can be interpreted as the heat transferred under constant volume conditions.

A: False, False, True, True
B: True, True, True, True
C: False, True, True, False
D: True, False, True, False

Answer 11

D

Question 12

Determine whether the following statements are TRUE or FALSE:
(a.) Ludwig Boltzmann introduced the concept of entropy and elucidated its behavior in order to explain the direction of spontaneous change
(b.) When the temperature of a system is increased, the number of feasible microstates decrease, effectively leading to an increase in entropy
(c.) A process wherein two ideal gases in separate bulbs, both at a pressure of 1 bar, are connected and allowed to expand into the total volume, exhibits a positive change in entropy
A: True, False, True
B: False, False, True
C: True, True, False
D: False, True, False

Answer 12

B

Question 13

Which among the following relationships fully encapsulates the idea of the Second Law of Thermodynamics
A: delta S_system < 0
B: delta S_universe > delta S_system +
delta S_surrounding
C: delta S_universe > 0
D: delta S_system <deltaS_surrounding

Answer 13

C

Question 14

For each of the following processes, determine the trend of the enthalpy and entropy
(A.) Ethyl Alcohol evaporating from a glass container
(B.) A diatomic molecule dissociates into atoms
(C.) Charcoal is burned to form carbon dioxide and water
A: delta H > 0, delta S < 0; delta H > 0, delta S < 0; delta H < 0, delta S > 0
B: delta H > 0, delta S > 0; delta H < 0, delta S > 0; delta H > 0, delta S < 0
C: delta H > 0, delta S > 0; delta H >
0, delta S > 0; delta H < 0, delta S >
0
D: delta H < 0, delta S < 0; delta H >
0, delta S < 0; delta H > 0, delta S >
0

Answer 14

C

Question 15

Which among the following relationships fully encapsulates the idea of the Second Law of Thermodynamics
A: delta S_system < 0
B: delta S_universe > delta S_system +
delta S_surrounding
C: delta S_universe > 0
D: delta S_system <deltaS_surrounding

Answer 15

C

Question 16

For the combustion of liquid acetylene in the presence of oxygen, liquid water and carbon dioxide gas is produced. Given this reaction, which among the following statements is TRUE?
A: Since delta S is positive, delta G is more negative than delta H
B: Since delta S is negative, delta G is more negative than delta H
C: Since delta S is positive, delta G is less negative than delta H
D: Since delta S is negative, delta G is less negative than delta H

Answer 16

D

Question 17

Which among the following is the third gas that William Ramsay isolated with Morris Travers?
A: Argon
B: Neon
C: Krypton
D: Xenon

Answer 17

D

Question 18

How many carbon atoms are there in one molecule of “buckyball”?

Answer 18

60

Question 19

For a criminal case, two men are interrogated in regards to an attempted poisoning of a police officer. During the investigation, it was found out that both men had traces of Polonium-210 on their hands while a third accomplice of theirs had Po-210 on his clothes. Through analysis of the police officers stomach content, it was confirmed that he had ingested Po-210. Which among them is/are bound to die if not properly treated?
A: The police officer only
B: The two men and the third accomplice
C: The police officer and the two men D: All four of them

Answer 19

A

Question 20

Which among the following scientists discovered radioactivity?
A: Marie Curie
B: Henri Becquerel
C: Otto Hahn
D: Ernest Rutherford

Answer 20

B

Question 21

Which among the following statements regarding Sb-122 and Xe-136 is TRUE?
A: Sb-122 is more stable than Xe-136 because of its atomic number
B: Xe-136 and Sb-122 are radioactive
C: Xe-136 is more stable than Sb-122 because of the amount of its neutrons
D: Sb-122 and Xe-136 are both stable

Answer 21

A

Question 22

Which among the following can detect the neutrons produced by U-235 undergoing nuclear fission?
A. A Geiger Counter containing Fluorine Gas
B. A Scintillation Counter containing Zinc Sulfide and Xenon
C: A Geiger Counter containing Argon and Boron trifluoride
D: A Scintillation Counter containing Tungsten Carbide

Answer 22

C

Question 23

Which among the following is the phosphor of a scintillation counter intended for the detection of gamma radiation?
A: Zinc Sulfide
B: Metastable Technetium-99
C: NaI Crystals containing Thallium (II) Iodide
D: Buckminsterfullerene

Answer 23

C

Question 24

In which among the following can a Cherenkov Radiation be observed?
A: In the Water surrounding the core of a Nuclear Reactor
B: In the Mushroom Cloud produced after a Hydrogen Bomb Explosion
C: In a particle accelerator after the bombardment of two nuclides
D: In the Sun’s Corona during a Solar Eclipse

Answer 24

A

Question 25

Across the three most notorious accidents regarding nuclear power plants: Three Mile Island, Chernobyl, and Fukushima, what is the most common cause for their failure that led to several environmental problems?
A: A leak in the fuel rods initiating an explosion
B: Bursting of reactor due to uncontrolled pressurized steam
C: Loss of proper cooling and/or moderator
D: Run-off chain reactions of the fissile material

Answer 25

C

Question 26

The Bataan Nuclear Power Plant is
planned to be retrofitted in hopes of
using it for the first time. One point
of concern is the material that would
be used in the outer portions of the
room housing the fuel rods. If the radiation
coming from the fuel rods would be a strong beta emission, which material among the following should be utilized?

Answer 26

8 mm of Lucite