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