Day 1 (additional) Flashcards
Which of the following is unsaturated fatty acid?
Lauric Acid
Myristic Acid
Oleic Acid
Palmitic Acid
Oleic Acid
Ozonolysis of cyclohexene produces
Adipic acid
Recording Soectrophotometers sometimes operate with feedback loops that vary the power of the reference beam until it matches the power of the beam through the sample. This mode of operation
a. Eliminates the need for a continuous source
b. Require two monochromators
c. eliminates the need for non-absorbing solvents
d. makes the detector to a null device, with the result that nonlinear response to a radiant power would not be deleterious
d. makes the detector to a null device, with the result that nonlinear response to a radiant power would not be deleterious
The amount of chlorine available in water after disinfection is called
Residual Chlorine
Which of the following is a covalent oxide
-BeO
-MgO
-K2O
-Rb2O
BeO
Conductance measurements at infinite dilution will be valid for the determination of the solubility of difficulty soluble salts and saturation point because
a. They have very low concentrationd at their saturation point
b. They conduct minimal current
c. at infinite dilution the concentration cannot be achieved
d. they are strong electrolytes
a. They have very low concentrations at their saturation point
Refers to the uptake and translocation of metal contaminants in the soil by plant roots into the above ground portion of the plants
phytoextraction
Which of the following is not a hexose?
a. Ribose
b. Fructose
c. Altrose
d. Mannosr
a. Ribose
Vinylbenzene is also known as
Styrene
Microorganisms that use carbon dioxide as their carbon source
photo-autotrophs
What sequence of processes must be done to obtain m-nitrotoluene?
Nitration then Alkylation
One of these statements is not correct for ideal gases
a. The volume occupied by the gas is negligible compared to the volume of the containing vessel
b. the product of PV is a constant
c. the ratio of density/pressure is a constant at a given temperature
d. PV/T is a constant for a known quantity of a gas
b. the product of PV is a constant
Which of the following might be used as an electrode?
a. a stick
b. a nail
c. a glass rod
d. a soda straw
b. a nail
Addition of Grignard Reagent to ketones results in the formation of ________ alcohol.
Dihydric
The reaction of alkylhalide and an alkoxide to produce ether is called
Williamson synthesis
The process in petroleum refining that increases the yield of the most useful fractions is
Cracking
Which of the following organisms are considered coencytic?
a. protozoa
b. algae
c. molds
d. fungi
c. molds
All of the following processes will produce a ketone EXCEPT
a. Hydration of alkynes
b. Ozonolysis of alkenes
c. Friedel-Crafts alkylation
d. Reduction of alcohols with NaBH4
c. Friedel-Crafts Alkylation
Which of the following is a protein?
a. collagen
b. enzymes
c. hemoglobin
d. all of these
d. all of these
Basic Amino Acid
a. lysine
b. Arginine
c. Histidine
d. all of these
d. All of these
Part of the nutrient cycles in which chemical nutrients reside in the soil, watet, or air
environmental phase
A visible concentrated growth of algae or other algae or other aquatic life/plants is called
bloom
The ________ is a global undertaking on global warming and greenhouse gases
Kyoto Protocol
Chemicals which are trested by the manufacturer showing the actual percentages of impurities and labeled on the containers are called
a. reagent grade chemicals
b. analytical reagent
c. certified reagent
d. all of these
d. all of these
The Compound CFCl3 is used as a/an
Refrigerant
The oxidatuoh state of oxygen is usually -2, except in peroxides, it is -1. Which of the following compounds is peroxide?
a. KO2
b. Na2O2
c. H2O
d. BaO
b. Na2O2
The current DENR secretary
Maria Antonia Luzo-Lozayga
An increase in the temperature of the reactants causes an increase in the rate of reaction. The best explanation is: As the temperature increases,
a. the concentration of reactants increases
b. the activation energy decreases
c. the collision frequency increases
d. the fraction of collisions with total kinetic energy > Ea increases
d. the fraction of collisions with total kinetic energy > Ea increases
Basic Properties are characteristic if all alkaline earth metal oxides except one. Its formula is
BeO
MgO
SO2
B2O3
BeO
Two liquids form a solution and release a certain amount of heat. How does the pressure above the solution compare to that predicted by Raoult’s Law?
a. It will be the same
b. It will be greater
c. It will be smaller
d. It will show positive deviation
c. It will be smaller
The method of standard addition compensates for matrix effects provided
a. the addition does not dilute the sample appreciably and does not itself introduce quantities of interfering substances
b. the addition dilutes the sample enough that the concentrations of interfering substances are lowered to neglible values
c. the addition contains none of the substance being determined
d. the addition contains a large enough quantity of some substance to a swamp out sample variations
a. the addition does not dilute the sample appreciably and does not itself introduce quantities of interfering substances
The temperature at which a real gas obeys the ideal gas law over an appreciable pressure range
Boyle Temperature
Chopping the source beam in conjuction with the use of a tuned AC amplifier in an atomic absorption spectrophotometer accomplishes the following
a. a recording potentiometer can be used instead of a voltmeter for the readout
b. a less sensitive detector can be ysed instead of the usual photomultiplier tube
c. a cooler can be used without decreasing the population of ground-state atons
d. radiation emitted by excited atoms in the flame will bit interfere with the absorbance measurement
d. radiation emitted by excited atoms in the flame will bit interfere with the absorbance measurement
Which if the following is not a correct element-precipitating agent pair?
Cl-AgNO3
Mg-(NH4)2HPO4
Al-HCl
Zn-H2S
Al-HCl
For a faced-centered cubic unit cell, each corner contributes _____ lattice points to the unit cell
1/8
The reagent that will yield diol from a given alkene:
a. Hot, acidic, KMnO4
b. O3, Zn, and H2O
c. OsO4 in NaHSO4
d. H+ / H2O
c. OsO4 in NaHSO4
A genie is willing to grant you any wish if you can pick which of his carbon functional group would boil second to the last. Choices: Alcohol, ether, ester, and carboxylic acid. What would you choose to get a wish come true?
Alcohol
Butanol is _____ volatile than diethyl ether since it could gorm stronger IMFA through _______
Less, H-bonding
Which functional grouo/s do not react through electrophilic addition?
a. Alkanes
b. Alkenes
c. Alkynes
d. None of these
a. Alkanes
Reaction of acetone with methyl magnesium bromide, followed by protonation produces a:
Tertiary Alcohol
Which among the following statements about covalent bonds is/are correct?
a. Sigma bonds possess lower energy than pi bonds, due to its hybridization
b. sp3-hybridized MO’s typically tetrahedral electronic geometry
c. Tertiary carbocations are relatively stable, and more easily formed than secondary carbocations
d. All of the above
D. All of the above
Which among the following aromatic compounds is more reactive than benzene towards Aromatic substitution reactions?
a. Chlorobenzene
b. Nitrogenzene
c. Phenyl ethanoate
d. Ethyl benzene
c. Phenyl Ethanoate
Which among the following materials is most reactive towards SN2 reactions?
a, 2-chloro-2-methyl propane
b. 2-chloro propane
c. 1-chloro propane
d. All of the choices above
c. 1-chloro propane
administrative order issued by DENR includes “navigable waters” as one of its classification
DAO 2016-08
Which persistant organic pollutant included in the initial list of the 12 POPs under stockholm convention is not considered as a pesticide?
a. Chlordane
b. Dieldrin
c. Heptachlo
d. Hexachlorobenzene
d. Hexachlorobenzene
Esterification can be achieved by reactant the following pairs of reagent:
a. Alocohol and carboxylic acid
b. Alcohol and acid anhydride
c. Alcohol and Acyl Halide
d. All of these
d. All of these
Trace Metal which causes disintegration of the bones or more commonly called itai-itai disease
Cd
composition of acid rain
nitric acid and sulfuric acid
In titration of weak acid with a strong base, which of the following is the best indicator to be used?
a. Bromcresol green
b. Methyl orange
c. Methyl red
d. Phenolphthalein
d. Phenolphthalein
Biochemical compounds are either hydrophobic, hydrophilic or ampiphatic. Classify the following compounds: glucose, stearic acid, soaps, fatty acids
hydrophilic, ampiphatic, ampiphatic, hydrophobic
Taurine, a beta amino acid belongs to the acidic group of:
-SO2OH
trans-2-pentene and Cyclopentane are ________ isomers
constitutional
The millenium prize problems consists of seven problems in mathematics that wete stated by the clay mathematics institute. You want to become the seconr person to solve one of these problems. What is the first millenium prize problem solved?
Poincaré Conjecture
Which of the following has the highest MCL: Xylene, Benzene, Lindane, Heptachlor
Xylene
Arrange the following in terms of increasing toxicity:
1: heptachlor
2: Dieldrin
3: DDT
4: As
5: Chromium
3, 1, 4, 2, 5
most abundant by MASS on earth
Iron
Thunderbolts and lightning, very, very, frightening me. When lightning strikes sand, it fuses grains to create a small glass-like tube. what is the name of this compund?
Fulgurite
He established law of constant proportions, concept of allotropy, discovered cerium and selenium, and the vital force theory
Jöns Jacob Berzelius
The lack of this enzyme is responsible for Asian flush when drinking alcohol
Aldehyde dehydrogenase 2
