Chemistry Exams - For Final Exam
For the balanced chemical equation _____ CH4 + ____ O2 ---> ___ CO2 + ___ H2O, the corresponding coefficients (A, B, C, and D) are A. 1, 2, 1, 2 B. 2, 3, 1, 2 C. 2, 2, 1, 1 D. 1, 2, 2, 2
A. 1, 2, 1, 2
How many tons of carbon dioxide are released into Earth's atmosphere following 3.6 billion tons of carbon burning? A. 13.2 billion B. 32 billion C. 6.7 billion D. 8 million
A. 13.2 billion
How many tons of sulfur were used during St. Helen volcano eruption when 32 million tons of sulfur dioxide is released in the earths atmosphere? A. 16 million B. 32 million C. 64 million D. 8 million
A. 16 million
Which pair of gases makes up primary two components (with highest concentration) of an inhaled breath? A. NO2 and N2 B. O2 and N2 C. CO2 and O2 D. N2 and Ar
B. O2 and N2
Choose which of the following statements about diamonds is true (pick one) A. Diamond is forever B. Over many millions of years, it will convert into a material that is present in lead pencil; C. Diamond is a very soft material; D. None of the above;
B. Over many millions of years, it will convert into a material that is present in lead pencil;
The energy needed to initiate a chemical reaction is called the A. Heat of combustion B. Bond energy C. Activation energy D. Renewable energy
C. Activation energy
Which four elements constitute a major portion of your body by mass? A. C, Na, K and S B. C, H, N and P C. C, H, O and N D. H, O, Ti and S
C. C, H, O and N
Which of the following molecules is an HFC? A. CH2C1-CC12F B. CH2FC1 C. CF3CH2F D. CHC1F2
C. CF3CH2F
What is the chemical formula for CFC-21? A. CH3Cl B. CHCl3 C. CHCl2F D. CHClF2
C. CHCl2F
The chemical name of P2O5 is: A. Phosphorous oxygen B. Diphosphorous pentaoxygen C. Diphosphorous pentaoxde D. Phosphorous pentaoxide E. None of above
C. Diphosphorous pentaoxde
The most typical steps in the purification of municipal drinking water are in the following order: A. Filtration, distillation and chlorination B. Filtration, chlorination, ozonation C. Flocculation, filtration and chlorination D. Flocculation, filtration, and UV irradiation
C. Flocculation, filtration and chlorination
Which above two molecules are isomers? (Pic on tests) I= C2OH6 II= COH4 III= C2OH6 ------------------------------------------------------------------------- A. I and II B. II and III C. I and III D. I, II and III
C. I and III = both C2OH6
Which of the following atoms pair can form hydrogen bonding? I. Hydrogen and Fluorine II. Hydrogen and oxygen III. Chlorine and oxygen IV. Nitrogen and hydrogen --------------------------------- A. I and II only B. I, II, and III only C. I, II and IV only D. None of above E. All of above
C. I, II and IV only
Which of the following is the main metal constituent that is responsible for )2 (oxygen molecule) transport in the blood of humans, mammals, and other vertebrates? A. Copper B. Phosphorus C. Iron D. Carbon
C. Iron
Based on the elements we discussed in the period table, which one of the following heroes could be a female? A. Superman B. Batman C. Ironman D. Hulk E. Thor
C. Ironman
Which of the following substance is not considered to be an air pollutant? A. NO2 B. SO2 C. N2 D. O3
C. N2
Which is more hazardous to health: PM2.5 or PM10? A. Both are equal in toxicity B. PM10 C. PM2.5 D. All of above
C. PM2.5
The energy stored in the chemical bonds of fossil fuels is a form of ________ energy. A. Heat B. Light C. Potential D. Kinetic
C. Potential
What are main components of an atom? A. Electrons and neutrons; B. Protons and electrons C. Protons, neutrons, and electrons; D. Neutrons and protons E. None of the above
C. Protons, neutrons, and electrons;
Which is not a mixture? A. A jar filled with rocks and sand B. Sea water C. Sodium chloride D. A glass of Kool-Aid
C. Sodium chloride
Ozone presence is beneficial at _______ but is harmful at ________ A. Close to earth, forest B. Nowhere, nowhere C. Stratosphere, troposphere D. Troposphere, stratosphere
C. Stratosphere, troposphere
Why is water vapor emission not addressed even though water is a greenhouse molecule, and it is produced in the combustion of fossil fuels? A. Water absorbs only lower energy infrared frequencies B. Water has a low molecular weight C. The anthropogenic contribution of water to the atmosphere is insignificant D. Water is not classified as a pollutant
C. The anthropogenic contribution of water to the atmosphere is insignificant
Silicon is a: A. Non-metal B. Metalloid C. Metal D. All of above
B. Metalloid
Which are the largest CO2 sources and sink? A. burning fossil fuel/ making cement = 5.5 +- 0.5 B. Cutting tropical forest = 1.6 +- 1.0 C. Uptake by atmosphere = 3.3 +- 0.2 D. Uptake by oceans = 2.0 +- 0.8 --------------------------------------------------------------------------- A. A and C B. B and C C. A and D D. B and D
A. A and C
Which is not true? A. A solute dissolves other substances that are called solvents. The resultant mixture is known as a solution. B. Sugar and salt are solutes in Kool-Aid which contains a lot of water and some salt and sugar C. Cooking oil is insoluble in water D. Table salt is soluble in water
A. A solute dissolves other substances that are called solvents. The resultant mixture is known as a solution.
What is a valence electron? A. An electron in the outer most energy level of an atom B. An electron in the inner most energy level of an atom; C. Number of neutrons present in an atom; D. I don't have a clue
A. An electron in the outer most energy level of an atom
What are isotopes? A. Atoms of the same elements that contain different number of neutrons B. Non-metals present in air C. Atoms of elements with same atomic number D. Metals that do not react easily E. None of them
A. Atoms of the same elements that contain different number of neutrons
What skin cancer is the most prevalent and which cancer is the most dangerous form of skin cancer? A. Basal cell carcinoma and Melanoma B. Basal cell carcinomas and Squamous cell carcinomas C. Melanoma and Squamous cell carcinomas D. Squamous cell carcinoma and Basal cell carcinoma
A. Basal cell carcinoma and Melanoma
Which of the following sunscreen is the most effective for protecting you against UV radiations from the sun: A. Broad-band sunscreen of SPF 50 rating B. Non-broad band sunscreen of SPF 50 rating C. Broad-band sunscreen of SPF 15 rating D. There is no need to apply sunscreen on me...
A. Broad-band sunscreen of SPF 50 rating
The great smog of London (1952), the smog of St. Louis (1939), and the smog of New York ( 1966) resulted in loss of thousands of lives and many more got sick. Which of the following is true about smog; A. Burning of fossil fuel (especially coal burning) will not contribute to smog formation B. One of the main driving forces for the Clean Air Act was multiple occurrences of smog in the US C. The occurrence of smog has not significantly increased in the recent years D. Smog does not exist now, and it is never seen in the past
A. Burning of fossil fuel (especially coal burning) will not contribute to smog formation D. Smog does not exist now, and it is never seen in the past
How is carbon dioxide levels determined? A. By measuring the CO2 concentration in trapped air bubbles in the ice layers B. By measuring the 18O/16O ration in the CO2 molecules C. By extrapolating the CO2 level from the temperature of the ice D. By extrapolating the CO2 level from the average global temp
A. By measuring the CO2 concentration in trapped air bubbles in the ice layers
Which form of water disinfection continues to provide antibacterial protection after the water leaves the purification plant? A. Chlorination B. Ozonation C. UV radiation D. Filtration
A. Chlorination
Which of the following is incorrect: A. Cl- is a cation and K+ is an anion B. Cl- is an anion and K+ is a cation C. SO4- is an anion and Mg2+ is a cation D. HCO3- is an anion and Mg2+ is a cation
A. Cl- is a cation and K+ is an anion
Who is the first to make periodic table? A. Dmitri Mendeleev B. Babe Ruth (A brilliant baseball player but not a great chemist) C. Madonna Louise Ciccone (Really! anyway, who is she) D. Abraham Lincoln (Perhaps not!) E. Donald Trump (No!) F. Joe Biden (Not Possible!)
A. Dmitri Mendeleev
Who did prove that CFCs are main culprits of ozone destruction? A. F. Sherwood Rowland and Mario Molina B. Dmitri Mendeelev C. James Watson and Francis Crick D. Trump and Pence E. Biden and Sanders
A. F. Sherwood Rowland and Mario Molina
Which one of the following materials is produced in the greatest amount from one barrel of petroleum? A. Gasoline B. Asphalt and road oil C. Home heating oil D. Lubricants and waxes
A. Gasoline
The form of energy that flows from a warmer body to a colder body is called: A. Heat B. Temp C. Kinetic energy D. Work
A. Heat
Which conclusion was "very likely" in the 2014 report of the Intergovernmental Panel on Climate Change? A. Human-related activities related to greenhouse gas emissions are the main factor causing warming since mid-20th century B. The observed warming of the past 100 years is due solely to climate variability C. The artic sea ice thickness decreased approximately 90% during late summer/ early fall D. Summer droughts have increased
A. Human-related activities related to greenhouse gas emissions are the main factor causing warming since mid-20th century
Petroleum (crude oil) is a complex mixture of many substances, the majority of which are A. Hydrocarbons B. gases C. Complex carbohydrates D. Cellulose-based substances
A. Hydrocarbons
Which of the following wavelength region of the solar radiation is most significant contributor to climate change? A. Infrared B. UVC C. Visible D. UVA
A. Infrared
Which of the following is perhaps most environment friendly molecule used for dry-cleaning clothes available in the market: A. Liquid CO2 B. Liquid ammonia C. Liquid water-soap (but it is wet cleaning); D. Liquid propane E. Dry-cleaning of clothes is not possible at all with "per-chlorine" like molecules
A. Liquid CO2
What atmospheric component(gas) does not contribute to global warming? A. N2 B. CO2 C. H2O D. O3
A. N2
What is one of the most important uses of Actinides? A. Nuclear Fuel B. Railway transportation C. Fertilizer D. All of above
A. Nuclear Fuel
Which of the following statements is correct? A. Ozonation is more expensive that chlorination, and it does not leave an odor in the water B. Ozonation forms trihalomethanes in the treated water and leaves an odor in the treated water C. Ozonation forms trihalomethanes and is less expensive than chlorination D. Ozonation is not effective against water-borne viruses
A. Ozonation is more expensive that chlorination, and it does not leave an odor in the water
What is special about the South Pole versus the North Pole that leads to ozone depletion only at the South Pole A. Ozone molecules are broken up by magnetic forces at the south pole B. The atmosphere is colder at the North Pole than at the South Pole C. Polar stratospheric clouds form almost exclusively at the south pole D. There is more land mass at the south pole than at the north pole
A. Ozone molecules are broken up by magnetic forces at the south pole
Which is ppm and ppb? A. Parts per million and parts per billion B. Parts per billion and parts per million C. Parts per millions and parts per hundred D. None of above
A. Parts per million and parts per billion
Which of the following statements is true? A. The Medicine prize was given to: David Julius and Ardem Patapoutian; whereas the chemistry prize was given to Benjamin List and David W.C. MacMillan B. The physiology or medicine was awarded to Harvey J. Alter, Michael Houghton and Charles M. Rice; and the chemistry Nobel was awarded to Emmanuelle Charpentier and Jennifer A. Duodena C. To Syukuro Manabe. Klaus Hasselmann, and Giorgio Parisa was given for Medicine Nobel prize; and Benjamin List and David W.C. MacMillan were given Chemistry Nobel prize D. The medicin Nobel prize was given to David List and Ardem Patapoutian; and Syukuro Manabe, Klaus Hasselmann, and Giorgia Paris were awarded for Chemistry Nobel E. None of above
A. The Medicine prize was given to: David Julius and Ardem Patapoutian "For their discoveries of receptors for temperature and touch" ; whereas the chemistry prize was given to Benjamin List and David W.C. MacMillan "For the development of asymmetric organocatalysis"
"Cracking" used in refinery is A. The breaking of larger molecules into smaller ones B. The combination of fuel with oxygen C. Any reaction this is accompanied by the release of heat D. The heating of a solution and condensation of its vapors
A. The breaking of larger molecules into smaller ones
Which characteristic describes a compound but not a mixture? A. The combining ration of two or more element is fixed B. Two or more element combined C. Substances can be broken down into smaller parts D. Elements are combined in an arbitrary ratio
A. The combining ration of two or more element is fixed
Which of the following statements most accurately describes why earth is much warmer, and hence is habitable for humans and plants than it would be just based on distance between sun and earth. A. The fact that the earth has atmosphere with a minute amount of greenhouse gases (particularly, the presence of CO2 and water) B. Due to the presence of O3 in the stratosphere C. Due to the presence of N2 and O2 in atmosphere D. None of the above
A. The fact that the earth has atmosphere with a minute amount of greenhouse gases (particularly, the presence of CO2 and water)
We discussed in the class an anomaly of a much smaller ozone hole in 1988 over Antarctica then any previous year since 1982. Which of the following statements does correctly explain this anomaly? A. This was because of a much shorter ozone depleting period in 1988 than any of the previous years. This along with replenishment of ozone from other parts of the atmosphere led to a smaller ozone hole in 1988 B. This was a direct effect of Montreal Protocol which banned many CFCs and restricted use of CFCs in many countries; C. There is no ozone hole in the southern hemisphere. It is a big joke D. None of above
A. This was because of a much shorter ozone depleting period in 1988 than any of the previous years. This along with replenishment of ozone from other parts of the atmosphere led to a smaller ozone hole in 1988
A gasoline's octane rating is A. a measure of the gasoline's resistance to causing knocking in a vehicle's engine B. A measure of the pollutants produced by burning the gasoline in a vehicles engine C. A measure of the energy content of the gasoline; the higher the rating the better the gas mileage D. A measure of the purity of the gasoline; the high the rating the smaller the number of components in the mixture
A. a measure of the gasoline's resistance to causing knocking in a vehicle's engine
The concentration of argon in air is 9000 ppm. Express this number in pph A. 90 B. 0.9 C. 9 D. 0.0009
B. 0.9
CFC-___ represents a molecule with a chemical formula of CHC1F2 A. 12 B. 22 C. 11 D. 33
B. 22
How many maximum numbers of hydrogen bonds a water molecule and an antifreeze(ethylene glycol) can potentially form with other water molecules? A. 2 and 4 B. 4 and 6 C. 3 and 6 D. Hydrogen bonding does not exist
B. 4 and 6
What groups do halogens belong to A. 1A B. 7A C. 2A D. Zero
B. 7A
How does acid rain affect you? A. There is no affect of acid rain B. Acid rain is particular hazardous to pregnant women, infants, young children, ill and elderly people because it can attack sensitive tissue and lungs, and can increase in cardiovascular diseases and pneumonia C. Acid rain does not exist, and it is propaganda D. None of above
B. Acid rain is particular hazardous to pregnant women, infants, young children, ill and elderly people because it can attack sensitive tissue and lungs, and can increase in cardiovascular diseases and pneumonia
What is one of the most striking features among morphine, heroine, oxycodone and Narcan? A. All of these illict drugs contain C, H, N, and O in them but without any chemical resemblance B. All of these drugs contain C, H, N, and O in them but without any chemical resemblance C. All the above drugs have the same chemical structures D. Non of the above
B. All of these drugs contain C, H, N, and O in them but without any chemical resemblance
Which of the following is not true about both metals and non-metals? A. Metals are good conductor of heat and electricity but non-metals are not; B. Both metals and non-metals are present in equal amount in human body C. Examples of non-metals are oxygen, carbon, and hydrogen D. Examples of metals are copper, silver and gold
B. Both metals and non-metals are present in equal amount in human body
Although carbon dioxide is the primary compound discussed with respect to global warming; of the common atmospheric components the global warming potential (GWP) of a carbon dioxide molecule is very low. Which statement best explains this pair of facts? A. CO2 is formed in the combustion of fossil fuels B. CO2 exists in relatively much higher concentration for relatively long lifetime than many other greenhouse gases in the atmosphere C. CO2 has a low molar mass D. CO2 molecules are highly symmetrical
B. CO2 exists in relatively much higher concentration for relatively long lifetime than many other greenhouse gases in the atmosphere
During petroleum refining, catalysts play an extremely important role during A. Extraction of the oil from the earth B. Cracking and reforming processes C. Physical separation of the various components of the petroleum D. Environmental clean-up of oil wells
B. Cracking and reforming processes
Many municipal water treatment plants, Fluoride ions (F-, with concentration of about 1 ppm) are added because; A. It enhances the taste of water B. F- in water strengths the teeth enamel by forming fluorapatite which is more resistant to tooth decay (or bacterial attack) C. It actually enhances the teeth decay at this concentration D. All of above E. None of above
B. F- in water strengths the teeth enamel by forming fluorapatite which is more resistant to tooth decay (or bacterial attack)
Air quality index (AQI) for Carbondale, Illinois on a rainy day in June was 45. The level of health concern on this day was: A. Hazardous B. Good (not a concern) C. Moderate D. Very unhealthy E. None of the above
B. Good (not a concern)
Which of the following atoms are most inert elements in the periodic table? A. Halogens B. Group eight gases C. Alkali earth metals D. Alkali metals E. None of above
B. Group eight gases
How is heat energy used to generate electricity in a modern power plant? A. Heat warms wires causing electrons to move through them more rapidly B. Heat boils water to make steam which drives a turbine C. Heat warms the fins on a turbine, causing them to spin D. Heat generates strong magnetic fields through which the wires of a turbine move
B. Heat boils water to make steam which drives a turbine
Which element was used on outside skin of the space shuttle for protecting from hear? A. Sodium B. Helium C. Zirconium D. Magnesium E. Gold
B. Helium
Which of the following are truly associated with hydrogen bonding in the water molecules? I. Water has a molecular weight of only 18 g/mol but it has a very high boiling point of 100C. In comparison CO2 is a gas under normal atmospheric conditions even though it has a molecular weight of 44 g/mol II. Due to hydrogen bonding, water when frozen has a lower density then in its liquid state. This is one of the reason that fish and other living organisms survive in winter even the top layer of the pond or lake is frozen III. Due to hydrogen bonding, water has a very high specific heat providing the earth a more temperate atmosphere where water acts as a heat buffer. That is, it helps human, animals, and plants in controlling their temp under temp fluctuations IV. There is no hydrogen bonding in water, and it does not contribute to anything on earth --------------------------------------------------------------------------- A. I and II only B. I, II and III only C. I and III only D. II and IV only E. I, II, II and IV
B. I, II and III only
Which occurrences or processes are expected to reduce the level of atmospheric carbon? I. Decaying plant and animal remains ( which emits methane and other gases) II. The growth of trees III. Formation of carbonate rock in the ocean (through reaction of CO2 and mineral) IV. Animal respiration ---------------------------------------------------------------------------- A. I and II B. II and III C. III and IV D. I and IV
B. II and III
What is not true for Radon: A. It is a health hazard for people B. It is a very reactive gas C. It is a colorless and odorless D. It is one of the leading causes of lung cancer
B. It is a very reactive gas
In the petroleum industry, what does a refinery do? A. it separates crude oil into fractions consisting of compounds with similar properties B. It separates crude oil from the coal with which it is almost always found C. Heat warms the fins on a turbine, causing them to spin D. Heat generates strong magnetic fields through which the wires of a turbine move
B. It separates crude oil from the coal with which it is almost always found
Which of the following is true for lithium? Please pick only one choice of the following choices. A. Cesium (Cs) B. Lithium (Li) C. Sodium (Na) D. Potassium (K) E. There is no medicine available for this disorder
B. Lithium (Li)
How does ozone hole impact global warming? A. It does not impact global warming B. Ozone depletion may decrease the phytoplankton population which may result in increased global warming C. There is no ozone hole and no global warming D. All of above E. None of above
B. Ozone depletion may decrease the phytoplankton population which may result in increased global warming
Although the use of petroleum, natural gas, and coal as fuels share many risks, a major risk associated more with coal than with the two other fuels; A. Production of greenhouse gases upon burning it B. Potential harm to the environment during mining and it also poses a significant danger to miner who labor to extract it from earth C. Higher energy production upon combustion D. Eventual depletion of this resource
B. Potential harm to the environment during mining and it also poses a significant danger to miner who labor to extract it from earth
Which one of the following is not a current research effort in this regard? A. Obtaining alternative fuels from renewable sources such as garbage B. Reintroducing the use of tetraethyl lead to increase the octane rating of gasoline C. Converting coal into gaseous and liquid fuels similar to petroleum products D. Increasing the use of farm product biomass, such as corn, to produce ethanol
B. Reintroducing the use of tetraethyl lead to increase the octane rating of gasoline
How does soap and detergent clean fats and dirt off your clothes? A. They clean the dirty clothes through a mechanical process B. Soap and detergent molecules resemble both fat and water, and form particles called micelles and bubbles. Micelles can trap fats, dirts and virus and make them water soluble. Ultimately, micelles clean up dirt/fat C. Soap and detergents so do clean clothes D. All of above E. I have never used soap
B. Soap and detergent molecules resemble both fat and water, and form particles called micelles and bubbles. Micelles can trap fats, dirts and virus and make them water soluble. Ultimately, micelles clean up dirt/fat
Scientist believe they know the average global temperature over the last 160,000 years. Which property of the ice core samples from Antarctica provides info about the past temps? A. The thickness of the ice B. The 1H2O/2H2O ratio in the ice C. The carbon dioxide concentration in the ice sheet D. None of above
B. The 1H2O/2H2O ratio in the ice
One of the easiest ways to accomplish to obtain soft water is to use polymer beads that contain sulfonic acid in it. How does this method allow converting hard water into soft water? A. The beads are porous and uptake all the cations and anions in the water and bead tank B. The beads exchange Ca2+ and Mg2+ present in the hard water with NA+ and K+ ions in the bead column leading to softening of water C. The beads block Ca2+ and Mg2+ to flow and create obstacles to these ions to be present in the water D. This method has not work well, and may be used inly one time
B. The beads exchange Ca2+ and Mg2+ present in the hard water with NA+ and K+ ions in the bead column leading to softening of water
Why does it problematic if the combustion of a fuel possesses extremely low activation energy? A. The fuel will evaporate too easily and be hard to transport and store B. The fuel will ignite too easily and be hazardous C. Upon combustion, fuels with low activation energies produce greenhouses gases D. Upon combustion, fuels with low activation energies will not release useful amount of energy
B. The fuel will ignite too easily and be hazardous
The main reason that water supplies are "chlorinated" is A. To filter out solids from the water B. To kill bacteria in the water C. To make the water softer D. To remove lead salts from the water as insoluble lead chloride
B. To kill bacteria in the water
Reverse osmosis is illustrated in the diagram below, what is this process used for? A. To soften water by ion exchange B. To remove dissolved salts from sea water C. For the ozonation of water supplies D. To add fluorine to municipal water supplies
B. To remove dissolved salts from sea water
DNA, the genetic material of living organisms, is damaged by light in the A. Visible region of spectrum B. Ultraviolet region, especially below a wavelength of 320nm C. Ultraviolet region, especially above a wavelength of 340 nm D. Infrared region of the spectrum
B. Ultraviolet region, especially below a wavelength of 320nm
Chlorofluorocarbons rise to the stratosphere and A. React directly with stratospheric ozone to destroy it B. after interacting with UV energy, become free radicals, which destroy ozone C. Become free radicals that react with oxygen to create ozone D. React with free radicals to remove carbon dioxide
B. after interacting with UV energy, become free radicals, which destroy ozone
Bottled water is approximately ___ times more expensive than tap water A. 5 B. 10 C. 1,000-3,000 D. It is cheaper than tap water
C. 1,000-3,000
How many neutrons are present in aluminum with atomic number of 13 and atomic weight of 27? A. 12 B. 13 C. 14 D. 15 E. None of above
C. 14
How many periods are present in the periodic table A. 1 B. 18 C. 7 D. 9
C. 7
How many groups "A" (including inert gas group) are present in the periodic table? A. 10 B. 16 C. 8 D. 7
C. 8
In exothermic and endothermic chemical reactions, A. The mass of the products is greater than the mass of the reactants B. The mass of the products is less than the mass of the reactants C. The heat is released and absorbed respectively as the reaction proceeds D. The heat is absorbed and released respectively as the reaction proceeds
C. The heat is released and absorbed respectively as the reaction proceeds
Which of the following is not correct? A. The released of soot, sulfuric acid, and dust particles have a net cooling effect on climate B. The 1815 eruption of Mt. Tambora led to widespread cooling effect away and far from the volcano. The 1816 year is also called a year without a summer C. The volcano actually increases the warmth on the earth D. The amount of materials released during volcano dictates the overall cooling effect
C. The volcano actually increases the warmth on the earth
Which of the following statement about global climate change is incorrect and does not agree with scientific evidence? A. It is not a question if there is global warming due to human activities B. It is not even a question if there is global climate change but now the question is what its long-term effect on human survival will be C. There is no global warming due to human activities D. Human must change their habits and policies so that carbon dioxide emission due to fossil fuel burning must be reduced to slow down further warming of our beautiful blue earth
C. There is no global warming due to human activities
Which statement is correct? A. UV-A is the most energetic B. UV-B is the most energetic C. UV-C is the most energetic D. They are all equally energetic
C. UV-C is the most energetic
Which of the following statements most accurately represent the bonding nature of oxygen and ozone molecules A. Both oxygen and ozone are made up of only single covalent bonds B. Both oxygen and ozone are composed of only double covalent bonds C. Whereas oxygen contains a double covalent bond in it, the ozone molecule contains both double and single covalent bonds and also have resonance in it D. All of above E. None of above
C. Whereas oxygen contains a double covalent bond in it, the ozone molecule contains both double and single covalent bonds and also have resonance in it
Soft lignite (brown coal) is the lowest grade of coal. Its chemical composition, and hence its heat of combustion, is most similar to that of A. Diesel B. Natural Gas C. Wood D. Petroleum
C. Wood
What is the heat of combustion for ethylene, C2H4? A. -1587 kJ B. -1560 kJ C. -754 kJ D. -1324 kJ
D. -1324 kJ
Choose proper coefficients for each substance to balance the following chemical equation. ___C3H8(g) + ___O2(g) --> ___CO(g) + ___H2O(l) A. 1, 1, 2, 2 B. 1, 3, 7, 6 C. 2, 7, 6, 2 D. 2, 7, 6, 8
D. 2, 7, 6, 8
How many protons, neutrons, and electrons are there in the neutral atom of 9F19? (In order of Protons, neutrons, electrons) A. 10 9 10 B. 9 9 9 C. 10 9 9 D. 9 10 9
D. 9 10 9
What is an aquifer? A. Water purification system developed by the Romans B. A holding tank for disinfected water at the municipal water treatment plant C. A solution in which the solvent is water D. A large pool of natural water trapped in the sand and gravel below the surface of the earth
D. A large pool of natural water trapped in the sand and gravel below the surface of the earth
Ammonium Nitrate (NH4NO3) is an important fertilizer for source of nitrogen for plant. Which one of the following statements is correct? A. Ammonium nitrate is an excellent source of oxygen which when mixed with fuel can be explosive B. Large amount of ammonium nitrate stored in Beirut contributed to a huge explosion last year C. Purchase of very large quantity of ammonium nitrate may require a special permit from Bureau of Alcohol, Tobacco, Firearms, and Explosives D. All of above E. None of above
D. All of above
Facts about bottled water, which of the following is true: A. Major bottled water such as water in Aquafina comes from municipal sources B. Some people worry about the carbon dioxide emission due to manufacturing of plastic bottles and their transportation from site of packaging to various cities and villages across the country C. Many bottles go into landfill which creates environment concerns D. All of above E. None of above
D. All of above
Phytoplankton significantly affects humans, animals, and plants on earth. Which of the following statement is correct: A. Phytoplankton's are small organisms living in vast oceans; B. They make food through photosynthesis using sunlight C. They are affected by decrease in the ozone level and can thus lead to disturbance in the food chain sequence D. All of above E. None of above
D. All of above
Please choose one most appropriate statement of the following statements about crude oil; A. Sweet and sour of oil is related to sulfur content in the crude oil- lower sulfur containing crude oil is called sweet oil is more desirable B. The density of crude oil is related to its "heaviness" -"lighter" oil is more desirable C. A term called "TAN" is a measure of total acid content in the crude oil - lower TAN is more desirable because it is less corrosive to plumbing and equipment D. All of above E. None of above
D. All of above
We discussed in class a provocative theory regarding the role of fire in relation to human brain development. Which off the following is most appropriate to be true? A. Use of fire for cooking food resulted in breaking down of food into easily digestible material for human B. Another possible benefit of cooking food was decrease in the food-borne disease, especially for children and pregnant women C. Cooked food allowed human to get nutritious food in a shorter time, allowing them to do more creative and leisure activities D. All of the above E. Fire did not possibly do anything to the brain size of human- just a plain old lie!
D. All of the above
What are the potential concerns of fracking? A. Environmental effects on water contamination, air emissions and climate change B. Potential health risks to human C. Earth quake and tremors D. All of the above E. None of the above
D. All of the above
Which of the following is correct about the solar cycle? A. During solar cycle, the changes in the magnetic field and large burst of high- energy particles are thrown into the atmosphere B. It is a 11 year cycle C. One of a major effect of the solar cycle is possibility of damage to satellites in space, power supplies, and other sensitive infrastructure D. All of the above
D. All of the above
Which is the following is correct? A. Ozone forms by combining an oxygen atom with an oxygen molecule B. There is a dynamic steady state of ozone in the stratosphere C. UV radiation will dissociate ozone into an oxygen atom and an oxygen atom D. All of the choices are correct E. None of above
D. All of the choices are correct
During the Antarctic spring, ozone is destroyed at a greater rate than it is formed A. On the surface of atmospheric ice crystals B. In a process that is catalytic C. In polar stratospheric clouds D. All of these choices are correct
D. All of these choices are correct
The goal of the Montreal Protocol in 1987 was to A. Reduce the amount of new production of chlorofluorocarbons in developed countries B. Recycle existing chlorofluorocarbons rather than release them into the air C. Encourage research into substitutes for chlororfluorocarbons D. All of the choices are correct
D. All of these choices are correct.
Which of the following is not a noble gas? A. Argon B. Xenon C. Neon D. Chlorine
D. Chlorine
Which of the following statement is not true A. Lead, arsenic and mercury are very hazardous pollutants to human health B. Exposure to large amount of mercury can lead to birth-defects in infants, and cancer; and it is especially health hazardous to pregnant women and children C. One of the sources of lead, arsenic and mercury is burning of coal D. Coal-burning does not produce carbon dioxide
D. Coal-burning does not produce carbon dioxide
Which process plays the most important role in the greenhouse effect? A. Energy from the sun is reflected back into the atmosphere B. Energy from the sun is absorbed by the earth C. Energy from the sun is absorbed by the atmosphere D. Energy radiated by the earth is absorbed by the atmosphere
D. Energy radiated by the earth is absorbed by the atmosphere
Identify possible consequences of global warming. i. A rise in sea level ii. An increase in average relative humidity iii. An increase in forest growth in the Northern Hemisphere iv. A weakening of ocean currents --------------------------------------------------------------------------- A. I and IV B. I and II C. I, II and IV D. I, II, III and IV
D. I, II, III and IV
Which of these substances in drinking water pose a health risk? I. Lead water II. Hard water ions III. Trihalomethanes in water IV. Cadmium, benzene, Arsenic, and Mercury ---------------------------------------------------------------------------- A. I only B. I and II only C. I and III only D. I, III, and IV only
D. I, III, and IV only
The amount of oxygen in the exhaled air is: A. All oxygen is absorbed in the body B. More than that in inhaled air C. Same as that in inhaled air D. Less than that in inhaled air
D. Less than that in inhaled air
Choose the name of the compound (SO3 ) formed by combining sulfur dioxide(SO2) and oxygen molecule(O2) to form SO3 A. Monosulfur dioxide B. Sulfur oxygenate C. Sulfur oxide D. Sulfur trioxide
D. Sulfur trioxide
The additive that was added to gasoline to increase its octane rating but is no longer used is: A. Methanol B. Ethanol C. Benzene D. Tetraethyl lead
D. Tetraethyl lead
The O2 molecule breaks apart at lower wavelengths then the O3 molecule. What is the main reason for this? A. O2 is more reactive than O3 B. O3 is more reactive than O2 C. The average bond in O3 is shorter and stronger than that of O2 D. The average bond in O2 is shorter and stronger than that of O3
D. The average bond in O2 is shorter and stronger than that of O3
Below is the graph between altitude in kilometer (y-axis) and ozone concentration on x-axis. Which of the following is true, here ppmv is similar to ppm. ppmv represents ppm by volume. A. Ozone concentration is lowest in stratosphere B. Ozone concentration is 6 ppmv in the troposphere and it is 3 ppmv at 60 km altitude C. Why are we bothering about ozone? D. The highest concentration of ozone is about 7.9 ppmv at about 36 km above sea level (sea level is 0 km in the graph)
D. The highest concentration of ozone is about 7.9 ppmv at about 36 km above sea level (sea level is 0 km in the graph)
A small amount of sodium chloride (NaCl) in water is tested for conductivity using the type of apparatus shown. What do you predict will happen? A. The bulb will not light up. NaCl does not dissolve in water B. The bulb will not light up. NaCl is in the molecular form in aqueous solution C. The light bulb will shine dimly. NaCl is only partially ionized in aqueous solution D. The light bulb will shine brightly. NaCl is highly ionized aqueous solution
D. The light bulb will shine brightly. NaCl is highly ionized aqueous solution
The carbon cycle refers to A. The mechanism by which carbond dioxide causes global warming B. The frequency of light energy that affects the rotational energy of carbon dioxide C. The oxidation of glucose to form carbon dioxide and water D. The movement of carbon (both natural and human-activities) through living organisms, the atmosphere, the sea and the earth
D. The movement of carbon (both natural and human-activities) through living organisms, the atmosphere, the sea and the earth
Which is the only element that can be burnt in nitrogen A. Tantalum B. Tellurium C. Tungsten D. Titanium
D. Titanium
Which practices might be described as carbon sequestration? i. Planting trees ii. Deforestation iii. Pumping carbon dioxide deep into the ocean iv. Increasing combustion of fossil fuels ---------------------------------------------------------------------------- A. i and ii only B. ii and iii only C. iii and iv only D. i and iii only
D. i and iii only
In order to make useful predictions, which factors must be accounted for by climatic models? i. Cooling effect of atmospheric aerosols ii. Smoke, haze, and cloud cover iii. Change in land use iv. Combustion of fossil fuels ----------------------------------------------------------------------------- A. iv B. ii and iii C. iii and iv D. i, ii, iii and iv
D. i, ii, iii and iv
The pH of stomach and milk of magnesia are about 1.5 and 10.5, what one of the following statements is correct? A. The proton concentration is stomach and milk of magnesia are not equal B. The milk of magnesia contains more hydroxyl anions then that hydronium cations C. The stomach contains many more H3O+ than number of OH- D. The acid reflux can be relieved by drinking milk of magnesia E. All of above F. I have never seen OH- and H3O+ in my life
E. All of above
Which of the following is true, pick one most appropriate choice about the color of the fall leaves. A. The green color in the leave is due to chlorophyll which is made in abundance in summer when sunlight is plentiful B. With decrease in the sunlight, chlorophyll decomposes faster than its formation in the leaves. This leads to decreases in leaves green color in the fall C. Yellow and orange colors in leaves are due to carotenoids and flavonoids D. Dark red colors in leaves are usually associated with anthocyanins and carotenoids E. All of above
E. All of above
Which of the following statements is true? Pick one A. Diamond, graphite, fullerene Bucky ball, carbon nanotubes are allotropes of carbon B. All of the atoms except one element present in the periodic table contain neutrons; C. Hydrogen has three isotopes D. Chlorine is a member of VIIA group in the periodic table E. All of above
E. All of above
Which of the following is true for lithium? A. Most of the lithium is extracted (mined) economically from a south American country called Bolivia B. Lithium is mined in the form of lithium carbonate and related salts C. Along with lithium another alkali metal called potassium is also extracted D. Due to its high demand and value, it is considered white gold (the lithium salt is white color) E. All of the above
E. All of the above
Which of the following water disaster was induced by irresponsible human activities? A. Great lakes in the US B. Victoria lake in Africa C. Murray River in Australia D. Amazon in South America E. Aral Sea in the former Soviet Union
E. Aral Sea in the former Soviet Union
In class we discussed the ice albedo effect that affects global warming. Which of the following statements explains this effect? A. Ice does not have to do anything with global warming, its a hoax B. Some of the water from the melted snow and ice would become water vapor , which is a strong greenhouse gas C. Ice and snow strongly reflect light; whereas liquid water absorbs light energy and re-emits it as heat D. A and B E. B and C
E. B and C
Given that 1-hour average exposure limit for carbon monoxide(CO), ozone(O3), and sulfur dioxide(SO2) are 35 ppm, 0.070 ppm, and 0.075 ppm respectively. Arrange the toxicity of these pollutants from lowest to highest. A. CO, O3, SO2 B. O3, SO2, CO C. SO2, O3, CO D. SO2, CO, O3 E. CO, SO2, O3
E. CO, SO2, O3
Which one of the following is not an indoor VOC: A. Acetone B. Methanol C. Benzene D. Ozone E. Gold
E. Gold
