multiple choice............

Sigchi4life
Category:
Chemistry
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Question description

QUESTION 1

  1. Butane [CH3CH2CH2CH3] and 2-methylpropane [(CH3)2CHCH3] are

    Stereoisomers

    cis-trans isomers

    Structural isomers

    Optical isomers

2 points  

QUESTION 2

  1. Which of the following is ethylene?

    CH2=CHCH3

    CH2=CH2

    H-C=C-H

    CH3-CH3

2 points  

QUESTION 3

  1. Which alcohol is called wood alcohol?

    Ethanol

    Isopropyl alcohol

    1-propanol

    Methanol

2 points  

QUESTION 4

  1. The complete combustion of C2H6 yields

    C2H4 and H2

    CO and H2O

    CO2 and H2O

    C and H2

2 points  

QUESTION 5

  1. A compound containing seven carbon atoms could be

    Heptane

    Octane

    Hexane

    Nonane

2 points  

QUESTION 6

  1. Fermentation of carbohydrates is a source of

    MTBE

    Ethanol

    Ethers

    Methanol

2 points  

QUESTION 7

  1. If the half-life of an element is 5 days and 100 milligrams of that element is initially available, how many milligrams of the element are present after 25 days?

    50 mg

    100/25 mg

    100/32 mg

    100/64 mg

2 points  

QUESTION 8

  1. In the symbol 238U, the 238 is

    The mass number

    The atomic number

    The number of neutrons in the atom

    The number of protons in the atom

2 points  

QUESTION 9

  1. The product of the beta (0-1 β) decay of thorium-234 is

    Uranium-238

    Protactinium-234

    Uranium-234

    Uranium-2  

2 points  

QUESTION 10

  1. In terms of nuclear stability, which of the following atoms is the most stable?

    Fe

    H

    U

    Element 109

2 points  

QUESTION 11

  1. Which statement is not true about fission?

    Combination of atomic nuclei

    Process requires initiation by a neutron

    A chain reaction

    Products have smaller nuclei than reactants

2 points  

QUESTION 12

  1. Which of the following is not a current application of radioactivity?

    Food irradiation

    Radiocarbon dating

    Medical imaging

    Electrical energy from fusion reactions

2 points  

QUESTION 13

  1. What is the percent of ethanol in rum that is 140 proof?

    35%

    70%

    280%

    75%

2 points  

QUESTION 14

  1. The oxidation of primary alcohols can produce

    Carboxylic acids

    Amines

    Ketones

    Esters

2 points  

QUESTION 15

  1. What is the role of an organic peroxide in the polymerization of ethylene?

    The peroxide is a copolymer.

    The peroxide forms free radicals that initiate attack of double bonds.

    The peroxide destroys free radicals which could stop the reaction.

    The peroxide moderates the speed of the reaction, allowing for a more orderly process.

2 points  

QUESTION 16

  1. Which of the following is an incorrect pairing between the given formula and the type of functional group?

    CH2=CHCH2CH2CH2CH2CH2CH3, alkene

    CH3OCH3, amine

    CH3CH2OH, alcohol

    (CH3)2CO, ketone

2 points  

QUESTION 17

  1. An organic compound with an — NH2 functional group is a (n)

    Primary amine

    Ketone

    Ether

    Primary alcohol

2 points  

QUESTION 18

  1. In a condensation polymerization process, what happens to form the polymer chain?

    Small molecules such as water are split out and monomers are linked.

    Small molecules such as water are required for the bonding link.

    Small molecules may be split out or are required depending on whether an ester or an ether linkage is formed.

    Small molecules such as water are moved from one position to another.

2 points  

QUESTION 19

  1. Which object/objects are not chiral?

    Your hands

    Helical sea shells

    Spoons

    Golf clubs

2 points  

QUESTION 20

  1. For the peptide shown, which number indicates the peptide bond?

    A

    B

    C

    D

2 points  

QUESTION 21

  1. Which is NOT an organic functional group characteristic of carbohydrates?

    –CHO

    –OH

    –C-C-

    –NH2

2 points  

QUESTION 22

  1. How many natural occurring amino acids are known?

    20

    70

    Hundreds 

    Thousands

2 points  

QUESTION 23

  1. The folded structure of polypeptide chains held in place by —S—S— bonds is

    Primary structure

    Secondary structure

    Tertiary structure

    Quaternary structure

2 points  

QUESTION 24

  1. Base pairing between the two strands of DNA occurs by means of

    Hydrogen bonding

    Coordinate covalent bonds

    Ionic bonds

    Disulfide bonds

2 points  

QUESTION 25

  1. Digestion converts carbohydrates into

    Amino acids

    Fatty acids

    CO2 and H2O

    Monosaccharides

2 points  

QUESTION 26

  1. A food Calorie is equal to how many small calories?

    1000 cal

    10 cal

    1 cal

    0.001 cal

10 points  

QUESTION 27

  1. Which vitamin is most easily destroyed or removed by food processing that involve freezing?

    Vitamin F

    Vitamin E

    Vitamin D

    Vitamin B

10 points  

QUESTION 28

  1. How many Calories are in a sandwich that contains 5 g of fat, 25 g of carbohydrates, 7 g of protein and 3 g of fiber?

    173 Cal

    185 Cal

    148 Cal

    333 Cal

10 points  

QUESTION 29

  1. A blood serum cholesterol level of 240. mg/100 mL serum is considered to put a person at a high risk of heart disease.  How much cholesterol in milligrams would be carried in the blood serum of a person with blood volume of 11.0 pints?   (1 pint = 473 mL)

    103 mg

    1.25 x 106 mg

    5.20 x 103 mg

    12,500 mg

10 points  

QUESTION 30

  1. Which of the following list contains the abbreviation for "good" cholesterol and describes its function?

    LDL, transports cholesterol to arteries

    HDL, transports cholesterol to arteries

    LDL, transports cholesterol to liver for excretion

    HDL, transports cholesterol to livers for excretion

10 points  

QUESTION 31

  1. In all age groups, the leading cause of death at about 26% is

    Cerebrovascular diseases

    Accidents

    Heart disease

    Cancer

10 points  

QUESTION 32

  1. Penicillins work by

    Interfering with cell metabolism

    Preventing ovulation

    Shutting down production of folic acid

    Inhibiting enzyme that forms cross-linking in bacteria cell wall synthesis

10 points  

QUESTION 33

  1. A sun-screen suntan lotion that has an SPF rating of 16. What does this mean in terms of sun exposure?

    Allows a person to have 16 hours of sun exposure without burning

    Increases the skin’s natural sunburn protection by a multiple of 4

    Increases the skin’s natural sunburn protection by a multiple of 16

    Increases the skin’s natural sunburn protection by a multiple of 2 x 16

10 points  

QUESTION 34

  1. Which of the following is the most toxic based on these oral rat LD50 values?

    Lead, 20 mg / kg body eight

    Aspirin, 1750 mg / kg body weight

    Ethanol, 1000 mg / kg body weight

    Nicotine, 2 mg / kg body weight

10 points  

QUESTION 35

  1. As the LD50 of a substance increases, the associated toxicity will

    Increase

    Decrease

    Remain the same

10 points  

QUESTION 36

  1. What does a virus use to translate its own RNA into double-stranded DNA?

    Polymerase

    Protease

    Reverse transcriptase

    Ribosome

10 points  

QUESTION 37

  1. Toxicity data are tabulated for rats, mice, rabbits and small lab animals. Why isn't there any human LD50 data?

    Humans require large doses that would be too expensive

    Humans are not as genetically uniform as lab animals

    Human subjects require too much attention

    It is unethical and illegal to do toxicity tests on humans

10 points  

QUESTION 38

  1. Which form of iron contains the least amount of carbon?

    Steel

    Pig iron

    Cast iron

    These forms of iron contain no carbon

10 points  

QUESTION 39

  1. Amorphous materials

    Are solids like tar and glass that lack internal order

    Are solids with regular order

    Have a definite crystal structure

    Are crystalline solids

10 points  

QUESTION 40

  1. Superconductivity is the result of

    Extremely low electrical resistance

    Increases in available energy

    Very high concentrations of electrical charge

    Higher levels achieved in the purity of copper

10 points  

QUESTION 41

  1. Solar cells can be

    Built only using layers of p-type transistors

    Built only using layers of n-type transistors

    Built using alternate layers of n-type and p-type transistors

    Rechargeable 

10 points  

QUESTION 42

  1. How many valence electrons would be found in an atom used as dopant in a p-type semiconductor?

    3

    4

    5

    6

10 points  

QUESTION 43

  1. What structural unit is characteristic of quartz and most silicates?

    Planar

    Trigonal planar

    Tetrahedral

    Linear

10 points  

QUESTION 44

  1. Which of the following metals and ores is not a correct pair?

    Zinc, ZnS

    Iron, Fe2O3

    Gold, AuO

    Lead, PbS

10 points  

QUESTION 45

  1. A complete fertilizer is one that contains a mixture of the

    Organic nutrients

    Primary nutrients

    Secondary nutrients

    All nutrients

10 points  

QUESTION 46

  1. Which is a property of DDT?

    Chlorine free

    Fat-soluble

    High toxicity to mammals

    Chemically unstable

10 points  

QUESTION 47

  1. The principal compound in potash is

    KCl

    K2CO3

    K2O

    K2SO4

10 points  

QUESTION 48

  1. A bag of fertilizer is labeled 16-4-8.  How many pounds of P are in a 100 lb bag?a.16 lbb.4.0 lbc.1.8 lbd.7.0 lbe.2.2 lb

    16 lb

    4.0 lb

    1.8 lb

    7.0 lb

10 points  

QUESTION 49

  1. Plants extract nonmineral nutrients from

    The ground

    The air

    Water

    Organic matter

10 points  

QUESTION 50

  1. Which of the following ions is least likely to be leached from soil by natural water movement?

    Fe3+

    Ca2+

    Na+

    Mg2+


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