set c Flashcards
To verify whether is safe to consume, the water must comply with the PNSDW< which stands for:
- Philippine National Security of Drinking Water
- Philippine Natural Standard for Drinking Water
- Philippine National Standard for Drinking Water
- Potable Natural Standard for Drinking Water
Philippine National Standard for Drinking Water
The prohibition of production and use of CFCs and its products was done by different countries as a response to the:
- Stockholm Convention
- Kyoto Protocol
- Basel Convention
- Montreal Protocol
Montreal Protocol
Removal of suspended solids present in wastewater from a blast furnace gas cooling and cleaning plant is done by:
- Rotary Biological Contractors
- Bag Filters
- Trickling Filter
- Setting Tank
Trickling Filter
The fishy odor in wastewater indicates the presence of
- Hydrogen Sulfide
- Amines
- Skatole
- Mercaptans
Amines
According to DAO 34, water supply that requires complete treatment comply with the PNSDW in classified under:
- Class AA
- Class A
- Class B
- Class C
Class A
What does a negative value for standard enthalpy of reaction (delta Hrxn) mean?
- Spontaneous reaction
- Exothermic process; heat is released
- Endothermic process; heat is released
- Nonspontaneous reaction
- Exothermic process; heat is absorbed
Exothermic process; heat is released
A definition of the third law of thermodynamics is that
- the total mass o f the universe is constant.
- the combined mass and energy of the universe is decreasing.
- a perfect crystal of any substance at 0 K has a minimum entropy.
- in a spontaneous process, the entropy of the universe increases.
- the total energy of the universe is constant.
a perfect crystal of any substance at 0 K has a minimum entropy.
The octane number of a commercial gasoline is
- related to its auto-ignition temperature.
- always lower than that for 2,2,4-trimethylpentane.
- always higher than that for heptane.
- a measure of its ability to burn smoothly in an internal combustion engine.
- all of these choices
all of these choices
What is the correct name of N2O5?
Dinitrogen pentoxide
Which component o the following cell notation is the anode?
K | L || M | N
K
A system that does no work but which receives heat from the surroundings has
- q < 0, delta E > 0
- q = delta E
- q > 0, delta E < 0
- q = - delta E
q = delta E
If you have 2-methyl-2-butene, what process will you employ to produce’ secondary alcohol?
- hydroboration-oxidation
- ozonolysis
- addition of bromine water
- acid-catalyzed hydration
hydroboration-oxidation
Coulomb’s Law states that as the charge on the cation and anion decreases, the force (and potential energy) of the system _____.
- decreases
- cannot be determined
- remains the same
- it will be unstable
- increases
decreases
We were asked to analyze the trace composition of the pigments used in paint. XRF is superior to AAS for this purpose because
a. XRF is a non-destructive technique
b. XRF is capable of measuring multiple elements simultaneously
c. AAS is only used for molecular analysis
d. both a and b
e. none of the choices
both a and b
The fission reaction exploited in nuclear power stations involves
- neutron bombardment of uranium-235
- neutron bombardment of uranium-238
- neutron bombardment of plutonium-239
- x-ray irradiation of plutonium-241
- x-ray irradiation of uranium-235
neutron bombardment of uranium-235
Assuming the orbitals of two atoms overlap and interact with constructive interference, what is the resulting increase in wave density?
- bonding molecular orbital
- anion formation
- free radical formation
- cation formation
- antibonding molecular orbital
bonding molecular orbital
If you were to heat pentanoic acid and 2-butanol with a catalytic amount of strong acid, what do you get?
- Alkane
- Ketone
- Ester
- Amine
- Aldehyde
Ester
Which of the following will yield a carboxylic acid upon oxidation?
- 2 alcohol
- aldehyde
- 3 alcohol
- cycloalkane
- ketone
aldehyde
What is the best way to ensure complete precipitation of SnS from a saturated H2S solution?
- Add a strong base
- Add a more H2S
- Add a weak acid
- Add a weak base
- Add a strong acid
Add a strong base
Polymers when heated produce bonds between carbon atoms on separate strands. What do you call the resulting product?
- ring polymers
- cross-linked
- wired polymers
- fullerized polymers
- thermoplastics
cross-linked (covalent bonds)
It yields a primary alcohol upon reduction.
- Amine
- Aldehyde
- Ether
- Alkene
- Ketone
Aldehyde
Select among the pair of atoms that release the most energy during the formation of an ion pair if the combined radii of each pair are assumed equal.
- Na and Br
- Rb and F
- H and F
- K and O
- Al and S
Al and S
From the statements below, describe the combustion of glucose.
- non-spontaneous at all temperatures
- spontaneous at all temperatures
- non-spontaneous towards lower temperature
- spontaneous towards higher temperature
- cannot be determined
spontaneous at all temperatures
From the given electron configurations of an atom, which is most likely to be involved in a covalent bond?
a. 1s2 2s2 2p6 3s2
b. 1s2 2s2 2p6
c. 1s2 2s2 2p6 3s2 3p6
d. 1s2 2s2 2p6 3s2 3p3
e. cannot be determined
1s2 2s2 2p6 3s2 3p3
Determine the hybridization around the central atom in KrF4
a. sp3d2
b. sp3d
c. sp3
d. sp2
e. sp
sp3d2
