Mixed Subjects 2 Flashcards
1
Q
What is the molecular weight of sucrose?
A
342 g/mol
easy - look at perry’s table for organic physical properties
2
Q
What is the molar mass of air?
A
29 g/mol
easy - look at perry’s density table
3
Q
What elements were discovered by Curie?
A
Radium and Polonium
4
Q
What is the practical application of Joule Thomson effect?
A
Cooling
5
Q
Who initiated the development of periodic table?
A
Dmitri Mendeleev
6
Q
Who discovered photosynthesis?
A
Melvin Calvin
7
Q
The concentration of diazinon has been measured to be 42.8 ug/L. A study of the Matsu Fish (pinalitan ng Tilapia ang name ng fish) revealed an average lipid concentration of 30,600 ug/kg. What is the bioconcentration factor for the fish?
A
715
Environmental Engg Davis Problem P5-13
8
Q
What is the composition of acid rain?
A
Nitric Acid and Sulfuric Acid
9
Q
How does alpha, beta, and gamma particle affect the mass number of an atom?
A
4, 0, 0
10
Q
This refers to the ability of an object to resume its normal shape after being stretched or compressed.
A
Elasticity
11
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
262 kg
12
Q
If a labelled fatty acid with radioactive carbon-14 is fed to an experimental animal, in what type of compounds contained in the breath of the animal would the radioactive
material appear?
A
as CO₂
13
Q
A boiled egg is placed above an Erlenmeyer flask. The flask is then placed in a liquid nitrogen bath. What happens to the gas pressure inside the flask?
A
Decreases
14
Q
This is used in titration to cause change of color.
A
Indicator
15
Q
What is the product when ethanol is reacted with potassium dichromate?
A
Acetic Acid
Bettelheim Chemical Connections 14B
16
Q
What is an indication that a person is diabetic?
A
Odor of acetone responsible for characteristic “sweet smell” on the breath of severely diabetic patients
Bettelheim Chemical Connections 18C
17
Q
What is the product of the reaction
when 𝛼 − 𝑎𝑚𝑦𝑙𝑎𝑠𝑒 acts on amylase?
boards typo: acts on amylase
Bettelheim: acts on amylose
A
oligosaccharides
Bettelheim Problem 30.15
18
Q
How many moles of lactate are produced from 3 moles of glucose?
A
6 moles
Bettelheim Problem 28.13 Solution:
Each mole of glucose produceds two moles of lactate, so three moles of glucose give rise to six moles of lactate
19
Q
Which of the following is a secondary structurebreaker/alpha helix terminator?
Pro
Glu, Leu
Phe
Cys, Ser
A
Pro (Proline)
20
Q
What are the products of the activation of adenosine triphosphate (ATP) with adenylate cyclase?
A
Cyclic Adenosine Monophosphate (cAMP) and Pyrophosphate
Bettelheim Chapter 24.5 Lesson C
21
Q
What is the role of Ca²⁺ in releasing neurotransmitters into the synapse?
A
The concentration of Ca²⁺ in neurons controls the process. When it reaches 10⁻⁴ M, the vesicles release the nuerotransmitters into the synapse.
keywords: concentration controls process, releases when reaches 10⁻⁴ M
22
Q
Which block in the periodic table contains most elements?
s-block
p-block
d-block
f-block
A
d-block
23
Q
What statement best describe gases in shape and volume?
A
Gases do not have fixed shape and fixed volume.
24
Q
Is aspirin is made using the raw materials salicylic acid and acetic anhydride with a yield of 75%, how many grams of aspirin will be produced?
25
30
15
10
A
25
25
In the study of fats and and lipids, determine which of the two triglycerides has a higher melting point, Substance A - containing only lauric acid and glycerl, or Substance B - containing only stearic acid and glycerol?
B
A
both have the same melting point
sublimation of dry ice
B
26
Choose the process/es that occur/s with a decrease in entropy
freezing of water
boiling of water
dissolving salt in water
sublimation of dry ice
freezing of water
27
A certain solid compoun was tested in a laboratory and was analyzed to contain 6.5% hydrogen, 42.20% carbon and 5.5% oxygen, with a molecular weight of approximately 341.2. Determine the chemical formula.
C10H14O16
C12H12O11
C6H12O6
C11H18O12
C12H12O11
28
Glucose is the only carbohydrate compound that the brain can use of energy. Which pathway is mobilized to supply need of the brain during starvation?
gluconeogenesis
glycolysis
glycogenesis
none of these
gluconeogenesis
29
The difference between the actual property of a solution and value it would have as an ideal solution at the same T and P and composition is called
Residual
Partial property
Excess
Gibbs free energy
Excess
30
How to differentiate alkane alkene and alkyne?
combustion on an empty beaker
nature of carbon and its branching
reaction with Br₂
all of these
reaction with Br₂
31
These compunds are formed by the reaction of acids with alcohol.
Ethers
Esters
Bases
Anzymes
Esters
32
The element neon was discoverd by
Marks and Howell
Travers and Ramsey
Davy and Russel
Pontina and Berzelius
Travers and Ramsey
## Footnote
easy - check back of periodic table of elements
33
Choose the process that occurs with a decrease in entropy
freezing of water
boiling of water
dissolving salt in water
sublimation of dry ice
freezing of water
34
How many carbon atoms in olvanil?
40
38
15
26
26
35
In a dehydration reaction where water is lost, an organic compound C3H80 reacts with concentrated phosphoric acid and a prodct is formed. This product rapidlu decolorizes a solution of bromine in tetrachlormethane. What is a product?
Propanol
Propanolol-2
Propene
Propanol-1
Propene
36
Define is DNA? RNA?
Beta ribose phosphoric acid and 1,2 ribonucleic acid
Deoxyribonucleic acid and ribonucleic acid
Di-oxyl nucleic acid and cystosine
1,2-deoxyribose and cystosine
Deoxyribonucleic acid and ribonucleic acid
37
Who discovered radioactivity?
Becquerel
Marie Curie
Roentgen
Becquerel
38
Who discovered vulcanization?
Goodyear
39
Methyl bromide was banned in developing on 2005. When will this be phase out?
2010
2015
2020
2025
2015
40
What is common in the structure of malic acid and lactic acid?
Pyruvate
Enzymate
Hydroxyacid
Glutamine
Enzymate
41
Molecular weight of Lindane (C₆H₆Cl₆)
291 g/mol
## Footnote
easy - just use periodic table
42
An atom is considered radioactive if ratio of atomic number is,
>75
>83
Between 80 to 100
>83
43
Reaction of acid and alcohol
Esterification
44
How many hydrogen bonding in Uracil and Adenine?
Two hydrogen bonding
45
What is the volume of 1mol of pure ethanol?
58 cm^3
## Footnote
dimensional analysis section 2 properties
46
Balance the complete combustion of ethanol that is used in formula one racing.
| boards typo: ethanol, actual: methanol
2,3,2,4
47
What is the subatomic particles of nucleus?
Electron and Neutron
Neutron and Protons
Proton and Electron
Neutron and Protons
48
What is the molecular weight of 1,1-tetradecenyl acetate?
254 g/mol
## Footnote
use section 2 handbook, tetradecane + acetate
49
Which number gives the identity of an element?
Electron
Positron
Proton
Neutron
Proton
50
Cumene has a molecular weight of 120.19 g/mol, what is the molecular formula?
C9H12
## Footnote
easy - use handbook or use choices whichever results same mol weight
51
What is the degrees of freedom of water at triple point
Zero
## Footnote
F = C - P + 2
F = 1 - 3 + 2
F = 0
52
Which of the acid combination is the dominant composition of acid rain?
nitric acid and carbonic acid
carbonic acid and sulfuric acid
nitric acid and sulfuric acid
none of the above
nitric acid and sulfuric acid
53
Radioactive solid nuclear wastes are disposed
off by
high temperature incineration
pyrolysis
pathological incineration
underground burial in concrete containers
underground burial in concrete containers
54
Which process uses air to convert harmful compounds in wastewater into less harmful and stable products?
Aeration
55
Rank the toxicities in terms of the first three most toxic for the following toxic compounds: DDT, Dieldrin, Arsenic, Heptachlor, and Chromium.
Dieldrin > Heptachlor > Arsenic
## Footnote
DHA
56
In which layer of the atmosphere is ozone found?
Stratosphere
## Footnote
The Smart Man Takes Elevator
Exosphere
Thermosphere
Mesosphere
Stratosphere (Ozone layer)
Troposphere
57
Fatty acid such as lauric acid and palmitic acid and oleic acid are long unbranched carboxylic acids consisting of 12 to 20 carbon atoms. Which type of fatty acid should people avoid ingesting, saturated or unsaturated and why?
Saturated, because the risk of cardiovascular disease is increased
Fatty acids are safe to ingest
Unsaturated, because the risk of cardiovascular disease is increased
Both fatty acids, because the risk of cardiovascular disease is increased
Saturated, because the risk of cardiovascular disease is increased
58
The person's sense of smell and taste depend on specific biochemic receptors present in a person's nose and mouth. In 2004, a Nobel Prize was given to the researchers who established this fact and identified the the type of organic compound associated with the sense of smell and taste. The chemical identified was;
rhodopsin
59
Name the major physiologically active substances that comes from: bark of the willow tree, the pituitary gland, the sap of the poppy and the belladenna plant.
Cocaine, reserpine, salicin, atropine
Reserpine, atropine, B-endorphine, opium
Opium, cocaine, salicin, and reserpine
Salicin, beta-endomorphin, opium, atropine
Salicin, beta-endomorphin, opium, atropine
## Footnote
SBOA
poppy-opium
60
It is the major component of lecithin.
Phosphatidylcholine
61
Taurine, a Beta amino acid belongs to the
acidic group of:
-SO2OH
-COOH
-COONH3
-C=OH
-SO2OH
62
In the study of fats and lipids, determine which of the two triglycerides has a higher melting point? Substance A containing only lauric acid and glycerol, or substance B-containing only stearic acid and glycerol?
Both have the same melting points
B
A
None of these
B
63
Define is DNA? RNA?
Beta ribose phosphoric acid and 1,2 ribonucleic acid
Deoxyribonucleic acid and ribonucleic acid
Di-oxyl nucleic acid and cystosine
1,2-deoxyribose and cystosine
Deoxyribonucleic acid and ribonucleic acid
64
Glucose is the only carbohydrate compound that the brain can use for energy. Which pathway is mobilized to supply the need of the brain during starvation?
gluconeogenesis
glycogenesis
glycolysis
none of these
gluconeogenesis
65
Which amino acid is the disruptor or breaker of secondary structures?
Proline
66
Diabetic patients are found to have an increased ketone concentration in their bodies. What causes this?
Acetoacetic acid decarboxylates into acetone and CO2, which causes the sweet smell on their breath
67
What is the product when alpha-amylase acts on amylase?
Oligosaccharides
68
What is the product of the oxidation of dopamine?
R-Epinephrine
69
Adenosine triphosphate, when acted with adenylate cyclase, produces
Cyclic adenosine monophosphate and pyrophosphate
70
What is the role of Ca ions as a signaling agent in the synapse?
sparks or puffs
71
Monosaccharides are colorless, crystalline solids, and are very soluble in water. Why?
True, because of their polar hydroxyl groups
72
What other particle is formed in the fusion of two protons to yield deuterium?
neutron
73
Which isotope is produced when Polonium- 216 decays by emitting an alpha particle followed by two beta particles?
Polonium-212
74
Process of breaking down a large isotope into smaller isotopes.
nuclear fission
beta particle emission
nuclear fusion
gamma ray emission
nuclear fission
75
When a thorium-230 atom undergoes alpha decay, the products of the reaction are usually:
Radium and an alpha particle
Actinium and an alpha particle
Actinium and a positron
Radium and a positron
Radium and an alpha particle
76
Balance the following equation: 225Ac82 = ? + 4He2; when one alpha particle is lost from actinium.
221Ac85 = 217Fr83 + 4He2
225Ac89 = 221Fr87 + 4He2
225Ac82 = 226Fr83 + 4He2
223Ac91 = 233Fr91 + 4He2
225Ac89 = 221Fr87 + 4He2
77
If radon-222 disintegrates to a stable condition by emitting three alpha emissions and two beta emission, determine the stable nucleus formed.
210Pb82
78
Determine the number of days it will take for one milligram of rubidium to decay to 0.6 mg.
132
98
63
211
63
## Footnote
ln(1/0.6) = ln(2)/86.2 x t
t = 63.53
79
Which of the following are true?
Nuclear fusion produces radioactive product
Nuclear fusion requires very high temperature to an order of 106 °C
Nuclear fusion involves chain reaction
Nuclear fusion releases more energy than fission
b and d only
a, b, c, and d
a, b and d only
a and d only
b and d only
80
Tell whether the following is true or false
a) Alpha decay emits 2 protons and 2 neutrons
b) Beta is more penetrating than alpha
c) Negative beta decay loses a neutron
d) Positive beta decay loses a proton
T, T, T, T
81
You are working in a site with strong beta particles. What material would you recommend for protection?
Aluminum
82
How does alpha, beta, and gamma particle affect the mass number of an atom?
4, 0, 0
83
When a can of soda is opened and CO2 is released to the atmosphere, what is the resultant pH of the soda?
Decreases
Increases
The same
All these
Increases
84
A solution of cation gives a crimson red flame. This flame test is a confirmatory test for:
Sr2+
K+
Mn2+
Ca2+
Sr2+
85
What is the color of nickel chloride?
white
blue
red
yellow
yellow
86
Substances whose solutions change color due to changes in pH
Indicator
87
Polymer used in bullet proof vest
Linear Polyethylene
88
Draw the condensed and skeletal structures of diethyl ether which is used by most doctors and hospitals as an anesthetic
during operations.
C2H5OC2H5
C6H606
C5H100
CH3CH20CH2CH3
CH3CH20CH2CH3
89
It is an organic reaction that converts an alcohol into an alkyl chlorine using triphenylphosphine and carbon tetrachloride.
Appel Reaction
90
What compound can be used to convert alcohol or a phenol into an ester?
Acetic anhydride: CH3-C-O-COCH3
Benzamide
Maleic anhydrate: CH3-CH2-COO-CH3
Aqueous bromine solution
Acetic anhydride: CH3-C-O-COCH3
91
Buckyball showed a spectrum peak of 720 amu. What is its molecular formula?
C60
92
Explain the differences in structure between a saturated hydrocarbon from an unsaturated hydrocarbon.
Any of these
A saturated hydrocarbons contains only carbon-carbon single bonds, while an unsaturated hydrocarbon contains one or more carbon-carbon double or triple bonds.
A saturated hydrocarbon is used mainly in cheaper forms of gasoline for vehicle use, while unsaturated hydrocarbons composed most of the gasoline formulas, used by current gasoline manufacturers.
A saturated hydrocarbon can no longer accept any hydrocarbon or inorganic element and compound, while an unsaturated hydrocarbon is more of flexible in reaction mechanisms.
A saturated hydrocarbons contains only carbon-carbon single bonds, while an unsaturated hydrocarbon contains one or more carbon-carbon double or triple bonds.
93
Determine whether TRUE or FALSE about the constitutional isomer.
They have the same molecular formula
They have the same molecular weight
They have the same connectivity to their atoms
They have the same physical properties
T; F; F; F
F; T; T; T
T; T; F; F
F; F; T; T
T; T; F; F
94
Which of the following is a primary application of ethylene?
Production of plastics and synthetic fibers
Use as a plant hormone for ripening of fruits
Use as a fuel in industrial applications
Use as a refrigerant in cryogenic applications
Use as a plant hormone for ripening of fruits
95
What structural characteristics do citric acid and malic acid have in common?
They are heterocyclic compounds
Both has three moieties of carboxylic acid
They contain an alkene bridge
They are both hydroxy acids
They are both hydroxy acids
96
What is the buckyball?
An epoxy resin
C60H+++
A fullerene
Sodium benzoate
A fullerene
97
Adrenaline is produced in the body through a biochemical nucleophilic substitution reaction where:
The leaving groups are larger and more complex than the halogen atoms frequently in nucleophilic substitution reactions.
According to Markovnikov's rule, the biosynthesis of epinephrine adds hydrogen atoms to the double banded carbon atom.
The nucleophilic nitrogen atom of norepinendrine from a covalent bond with the CH3 of S adenosylmethionine
The reactant neocleophile atom replaces the leaving group in the nucleophylic substitution reaction.
The reactant neocleophile atom replaces the leaving group in the nucleophylic substitution reaction.
98
What organic product is formed when C6H5CH2COOH is treated with CH3OH + H2SO4 (catalyst)?
C6H5CH2CH2OH
C6H5CH2C00-Na+ + CO2 + H20
C6H5CH2C00-NH4
C6H5CH2CO2CH3 + H20
C6H5CH2CO2CH3 + H20
99
In a dehydration reaction where water is lost, an organic compound C3H8O reacts with concentrated phosphoric acid and a product is formed. This product rapidly decolorizes a solution of bromine in tetrachloromethane. What is this product?
Propene
100
These compounds are formed by the reaction of acids with alcohols.
Ester
101
It is the reaction with ozone followed by reduction in the presence of Zinc and water
Ozonolysis
102
What is the product when alkyl halide is reacted with hydroxy group?
Alcohol
103
Which of the following is a pair of heterocyclic compounds?
Furan and Pyran
Propane and ethane
Cyclobutane and cyclohexane
benzene and naphthalene
Furan and Pyran
104
What is the product when ethanol is reacted with potassium dichromate?
Acetic Acid
105
Determine how many milligrams of rubidium-84 remains after 99 days from a ten mg sample. The half life is 33 days.
2.50 mg remains
0.10 mg remains
5.00 mg remains
1.25 mg remains
1.25 mg remains
## Footnote
ln(10/N) = ln(2)/33 x 99
N = 1.25
