Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PROB SOLVING PBE > 1. DAY 1 PBE > Flashcards

1. DAY 1 PBE Flashcards

1
Q

Determine whether TRUE or FALSE about constitutional isomer.
1. They have the same molecular formula
2. They have the same molecular weight
3. They have the same connectivity to their atoms
4. They have the same physical properties

A

T, T, F, F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A certain solid compound was tested in a laboratory and was anakyzed to contain 6.5% hydrogen, 42.2% carbon, and 5.5% oxygen with a mo

A

C12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In the study of fats and lioids, determine which of the two triglycerides has a higher melting point: substance A - containing only lauric acid and glycerol, or substance B - containing only strearic acid and glycerol.
A. Both have the same melting points
B. B
C. A
D. None of these

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When a can of soda is opened and CO2 is released tot he atmosphere, what is the resultant pH of the soda?
A. Decreases
B. Increases
C. The same
D. All of these

A

B. Increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Biochemical compounds are either hydropholic, hydrophobic, or amphipathic. Classify the following: glucose, stearic acid, soaps, fatty acids

A

Hydrophilic, hydrophobic, amphipatic, hydrophobic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The two most common components of acid rain are:

A

Nitric and sulfuric acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
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

Nitrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which of the following is true about the closest packing of atoms?
A. Tetrahedral voids are larger than octahedral voids
B. Tetrahedral voids are smaller than octahedral voids
C. Tetrahedral voids have same sizes as octahedral voids
D. None of these

A

B. Tetrahedral voids are smaller than octahedral voids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the types of radioactive decay?

A

Alpha, Beta, Gamma, Positron, Electron Capture (k capture)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In periodic table, which of the following is group considered a radioactive?
A. Above 75
B. Above 83
C. Above 115
D. Between 80-100

A

B. Above 83

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Chymotrsin is used for following protein as shown:
Met - Tyr - Leu - Trp - Gly - Phe - Ser
How many peptides can be formed after hydrolysis?
A. 3
B. 4
C. 5
D. 6

A

B. 4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following is ceramids?
A. Sphingosine
B. Sphingolipids, sphingosine, and sphingosine cerebrosides
C. Sphingosine cerebrosides
D. Sphingolipids

A

A. Sphingosine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Alkyl halide reacts with a hydroxide to form what compound?
A. Alcohol
B. Alkene
C. Alkyne
D. Alkane

A

A. Alcohol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the type of isomerism of cis-1, 4-cuclohexanol and trans-1, 2-cyclohexanol?
A. Constitutionals isomer
B. Stereoisomer
C. Both a and b
D. None of these

A

A. Constitutionals isomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the chemical formula of caffeine?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

There are 4 beakers, online with CCl4, one with dry ice, one exposed to air, and one with water. Which will get heated inside a microwave oven?
A. CCl4
B. Dry ice
C. Air
D. Water

A

D. Water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Hydrazine reacts with dinitrogen tetroxide to form nitrogen gas. How many kg of nitrogen gas can be formed from 200 kg of hydrazine?
A. 131
B. 262
C. 29.1
D. 65.6

A

262

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The design flow and overflow rates for a settling tank are 0.044 m3 · s−1 and 20 m · day−1, respectively. Determine the surface area of this tank. Determine the length of the tank, using conventional wisdom for length-to-width ratios. Determine the tank depth, assuming a detention time of 2 hours.

A

1.7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

A well-mixed sewage lagoon (a shallow pond) is receiving 430 m3 · d−1 of untreated sewage. The lagoon has a surface area of 10 ha (hectares) and a depth of 1.0 m. The pollutant concentration in the raw sewage discharging into the lagoon is 180 mg · L−1. The organic matter in the sewage degrades biologically (decays) in the lagoon according to first-order kinetics. The reaction rate constant (decay coefficient) is 0.70 d−1. Assuming no other water losses or gains (evaporation, seepage, or rainfall) and that the lagoon is completely mixed, find the steady-state concentration of the pollutant in the lagoon effluent.

A

1.10 mg · L−1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Description of a primary and a secondary cell

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the simplest type of control commonly expressed as having on/off position action?

a. Integral c. Bang Bang
b. Manual d. Input-Output

A

c. Bang Bang

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Product of distillation of coal tar

A

phenol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Example of pseudo plastic fluid

a. apple sauce
b. rubber latex
c. tap water
d. sewage sludge

A

a. apple sauce

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Another name of Taurine.

A

Aminoethanesulfonate or

2-aminoethanesulfonic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Who discovered zeolite?

A

Rober Gans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Also known as earthwax?

A

Ozocerite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

____ is nonporous rock containing kerogen.

A

Oil Shale

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Element used in standard 1 kg measurement?

A

Iridium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What is the third law of thermodynamics? .

A

The third law of
thermodynamics states that the entropy of a system approaches a constant
value as the temperature approaches absolute zero

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What is the sign convention of enthalpy during endothermic reaction?

A

positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

One way of obtaining IR spectra of solids is

A

Nojul Mull process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q
  1. Can oxygen be synthesized from nitrogen?
    a. Yes, by the bombardment of alpha particles
    b. Yes, by electron capture
    c. Impossible
A

a. Yes, by the bombardment of alpha particles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q
  1. 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

a. increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Arrange in increasing toxicity level: DDT, heptachlor, arsenic, dieldrum , Cr

A

heptachlor , dieldrum , Cr, DDT, arsenic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Formic acid (HCOOH; structural formula shown below) is secreted by certain species of ants when they bite.

Rank the relative strengths of the H-C and O-H bonds. Explain these rankings.

A

We need to compare the strength of a single bond between C and H and C and O. The oxygen atom is smaller than the hydrogen atom. With the increase of the atom radius, the bond length increases as well. Since the nucleus less strongly attracts the bonding electrons as the bond length increases, the C
−
−H bond will be easier to break. Therefore:

C−O > C−H
​

​

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What is the maximum mass of crude fluorite ore, in metric tons of fluorine if the ore contains 70% calcium fluoride?
A. 7.2
B. 1.9
C. 6.8
D. 7.8

A

7.2

41
Q

pKa of chloroacetic acid

A

2.85

42
Q

Ethylene glycol (EG) is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.p 197C). Calculate the boiling point elevation and freezing point depression of a solution containing 651 g of this substance in 2505 g of water

A

Tb = 2.144C
Tf = 7.788C

43
Q

A solution of HCl and a monobaric acid is titrated with NaOH. If the initila volume of the solution is 100 mL and the consideration of each moment is 0.011 M and the ionization constant is 1.01x10^5 and the concentration of the titrant base is 0.1M, estimate the pH and the optimum pKa of a weak acid indicator to allow determination of the HCl present

A

2.3, 5.0, 3.5

44
Q

An experimental electric jeep running in Makati on 12V battery at 20 m/s has a total energy storage of 2.0x10^7 Joules. If 8A kW is needed to move through vehicle, what is the quantity of energy supplied to the motor and how far will it travel?

A

667 A, 50 km

45
Q

A sample of chromite is analysed to contain 30% CrO3

A

2.378

46
Q

Characteristics of elements under group 1A

A

Has 1 electron on its outer most energy level

47
Q

Description of a primary and a secondary cell

A

Primary batteries are “single use” and cannot be recharged. Dry cells and (most) alkaline batteries are examples of primary batteries. The second type is rechargeable and is called a secondary battery

48
Q

Which of the following 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

49
Q

Particle with the same mass as proton

A

neutron

50
Q

Arrange in increasing level of toxicity 1: heptachlor 2: dieldrum 3: DDT 4: Arsenic 5: Cr

A

ESP
/

51
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
52
Q

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

A

polar covalent bond

53
Q

Metabolic pathways that break down molecules, releasing energy.

A

Catabolism

54
Q

Metabolic pathways that construct molecules, requiring energy.

A

Anabolism

55
Q

PRC Modernization Act of 2000

A

RA 8981

56
Q

How do you differentiate electromagnetic radiation

A

Wavelength

57
Q

Functional groups in thiotic acid

A

carboxylic group

58
Q

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

A

functional group

59
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

60
Q

What is the first step in utilizing proteins?

A

Hydrolysis

61
Q

Liquid Nitrogen is placed in an Erlenmeyer flask. Hard-boiled egg is then placed on top of the opening, what will happen?

A

Egg will be sucked in

62
Q

You are an environmental engineer sent to a place with the cholera epidemic, what the best thing to do?

A

Treat water supply

63
Q

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

A

plasmids

64
Q

What is the chemical used in sunblock?

A

ZnO

65
Q

Ketone and aldehyde in alcohol will form?

A

Acetals/Ketals

66
Q

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

A

They unite with covalent bond formation

67
Q

Acetylcholine is destroyed by an enzyme, acetylcholinesterase, into choline and acetic acid

A

Hydrolysis of acetylcholine

68
Q

Number of acetic acid formed by complete beta oxidation of n-octane

A

Zero

69
Q

Nucleophile of chymotrypsin reaction

A

Serine

70
Q

Amino acid sequence can exist at pH 9.5 but not in pH 7

A

lysine, histidine, arginine

71
Q

Which of the ff doesn’t have chiral center or cis-trans
3-methylcyclohexanol
1-methylcycohexanol
Cis-4-methylcyclohexanol
Trans-4-methylcyclohexanol

A

1-methylcycohexanol

72
Q

Value of plancks constant

A

6.62607015×10−34 J⋅s

73
Q

Pollutant produced from coal and petroleum

A

CO2,CO,NOx

74
Q

Which is nuclear fusion
A. the big bang
B. the radiant energy from sun
C. the formation of deuterium/tritium

A

the radiant energy from sun

75
Q

Instrument in measuring Radiation

A

Geiger Counter and Chamber

76
Q

Notation on alkane containing Cl

A

chloro

77
Q

Particle with the same mass of proton?

A

Neutron

78
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
79
Q

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

A

acetone

80
Q

Most negative ion

A

F-

81
Q

Where is water quality critical?
o Water infused with product
o Water used in the industry

A

water infused with product

82
Q

a signal f(t) that, when input into the system, produces a response y(t) = λf(t), where λ is a complex scalar eigenvalue

A

Eigenfunction

83
Q

Element used in standard 1 kg measurement

A

Iridium

84
Q

Lee-Kesler is applicable fo

A

Nonploar, slightly polar and high density
gas

85
Q

Example of shear thickening

A

Sand

86
Q

What is the most common contaminant in the BTEx proccess?

A

Benzene,
ethylbenzene, toluene and three isomers of xylene.

87
Q

What is the other name of bulk temperature?

A

Mixing-cup temperature

88
Q

Definition of polar covalent bond.
A. Unbalanced electron with unequal
sharing of electrons;
b. bonding of heteronucleus with unequal sharing of
electrons

A
89
Q

The range of melting point of the fatty acids.

A

Saturated: -100 to 110 ; unsaturated: -70 to 85

90
Q
  • fertilizer for fruits
A

C6H12N2O3 - Daminozide

91
Q

What protein is capable of undergoing a reduction process?

A

Cysteine

92
Q

Process that powers the sun and stars. Two atoms of hydrogen combine together, or fuse, to form an atom of helium.

A

Fusion:

93
Q

At a constant temperature, the amount of a given gas dissolved in a given type and volume of a liquid is directly proportional to the partial pressure of the gas in equilibrium with that liquid

A

Henry’s law

94
Q

SCADA -

A

Supervisory Control and Data Acquisition

95
Q

Which of these industries produce electricity aside from its main products?

A

Sugar industry

96
Q

Property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously.

A

Radioactivity

97
Q

_____ is the chemical reaction of sunlight, nitrogen oxides and volatile organic compounds in the atmosphere, which leaves airborne particles and ground level ozone

A

Photochemical smog

98
Q

Capsaicin is measured on the _______ and expressed in terms of ________

A

scoville scale
scoville heat units

99
Q
A

PROB SOLVING PBE (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions