A) 0.02% B) 0.0002% C) 0.002% D) 0.2%
A) Methanogenic microorganisms B) Aerobic bacteria C) Photosynthetic plants D) Fungal spores
A) Deep ocean crust B) Surface of leaves C) Gut of ruminants D) Atmospheric clouds
A) Solar and wind B) Coal and wood C) Peat and biomass D) Natural gas and oil
A) Heptane and octane B) Pentane and hexane C) Nonane and decane D) Methane and ethane
A) An aqueous solution of alkanes B) A solid mineral deposit C) A mixture of liquid alkanes and other hydrocarbons D) A pure source of methane
A) Oxygen-rich B) Glacial C) Anoxic D) Volcanic
A) High salinity and low pressure B) Direct sunlight and low pressure C) High temperatures and high pressure D) Low temperature and high acidity
A) Surface vegetation B) Volcanic vents C) Porous limestone D) Impermeable cap rocks
A) They cannot be readily replaced B) They react with ocean water C) They are toxic to the environment D) They are too expensive to drill
A) Moderate B) Complete C) Low D) High
A) Methane hydrate salt B) Methane acid C) Methane clathrate D) Methane gas
A) It is significantly less B) It exceeds the combined total C) It is exactly half D) It is roughly equal
A) Oxygen B) Carbon dioxide C) Water D) Nitrogen
A) Yes, extensively B) Only in the Arctic C) No D) Yes, on a small scale
A) Formaldehyde B) Methanol C) Methane radicals D) Carbon dioxide
A) Methane monooxygenases B) Dehydrogenases C) Lipases D) Cytochrome P450
A) Unpaired electrons B) Negative charge C) Positive charge D) Missing protons
A) Alcohols B) Carboxylic acids C) Haloalkanes D) Sulfonyl chlorides
A) Chlorine B) Iodine C) Bromine D) Fluorine
A) Homolysis B) Condensation C) Ionization D) Heterolysis
A) Mechanical pressure B) Heat or light C) Chemical catalyst D) Sound waves
A) Nucleophilic attack B) Dehydration C) Hydrogen abstraction D) Radical recombination
A) Halogens are ionized B) Radicals recombine C) Hydrogen is replaced D) Radicals split
A) Alkyl radicals B) Alcohols C) Haloalkanes D) Sulfonyl chlorides
A) Biological catalysts B) Light C) High pressure D) Vacuum
A) Enzyme complexes B) Sulfonyl complexes C) Transition metal complexes D) Halogen complexes
A) 8 B) 2 C) 6 D) 4
A) d2sp3 B) sp C) sp3 D) sp2
A) 90° B) 180° C) 120° D) 109.47°
A) 1.54 × 10−10 m B) 0.54 × 10−10 m C) 1.09 × 10−10 m D) 2.09 × 10−10 m
A) 1.80 × 10−10 m B) 1.25 × 10−10 m C) 1.09 × 10−10 m D) 1.54 × 10−10 m
A) eclipsed B) perpendicular C) staggered D) linear
A) 12.6 kJ/mol B) 20.5 kJ/mol C) 3.0 kJ/mol D) 10.0 kJ/mol
A) bond saturation B) steric hindrance C) electronic repulsion D) torsional strain
A) 700–750 cm−1 B) 2850–2960 cm−1 C) 1450–1465 cm−1 D) 800–1300 cm−1
A) 1375 cm−1 B) 2900 cm−1 C) 725 cm−1 D) 1450 cm−1
A) Molecule size has no effect on melting point B) Larger molecules have higher melting points C) Larger molecules have lower melting points D) Melting point is independent of molecular size
A) Lower melting point B) Higher melting point C) Reduced molecular weight D) Increased chemical reactivity
A) Hexane B) Methane C) Neopentane D) Octane
A) Isoparaffins B) Naphthenes C) Paraffins D) Olefins
A) Isoparaffins B) Naphthenes C) Isomers D) Paraffins
A) Homologs B) Isoparaffins C) Naphthenes D) Paraffins
A) Isobutane B) Isopentane C) Neopentane D) Cetane
A) Naphthene B) Cetane C) Cerane D) Isoparaffin
A) Colorless B) Clear blue C) Yellow D) White
A) Gases B) Liquids C) Dense crystals D) Waxy solids
A) Ionic bonds B) Hydrogen bonding C) Covalent bonds D) Van der Waals forces
A) Gases B) Liquids C) Solids D) Plasma
A) 5–10 °C B) 10–15 °C C) 20–30 °C D) 40–50 °C
A) Supercritical fluid B) Solid C) Liquid D) Gaseous
A) cyclo- B) di- C) neo- D) iso-
A) two B) five C) four D) three
A) -ene B) -yl C) -ol D) -ine
A) neo- B) cyclo- C) iso- D) di-
A) Alphabetical order B) By priority rules C) By size of the chain D) By number of carbons
A) di- B) neo- C) cyclo- D) iso-
A) C5H12 B) C5H10 C) C6H12 D) C4H8
A) 3 B) 6 C) 4 D) 5
A) IUPAC naming conventions B) Cahn–Ingold–Prelog priority rules C) The number of side chains D) Alphabetical order
A) -ene B) -yne C) -ane D) -one
A) Dmitri Mendeleev B) Friedrich Wöhler C) IUPAC D) August Wilhelm von Hofmann
A) C4H10 B) C3H8 C) C2H6 D) CH4
A) non-linear B) neutral C) natural D) normal
A) n-ketones B) nonanes C) n-paraffins D) n-alkenes
A) 6 B) 7 C) 8 D) 5
A) pentane B) butane C) ethane D) propane
A) Greek numerical prefix B) Latin numerical prefix C) The name of the corresponding acid D) The name of the corresponding alcohol
A) octane B) hexane C) nonane D) pentane
A) alkene B) alkane C) alkyne D) ketone
A) 16 B) 18 C) 14 D) 12
A) The boiling point of the compound B) The alphabetical order of elements C) Identifying hydrocarbon chains D) The source from which it was isolated
A) propionic acid B) methanolic acid C) ethanoic acid D) butyric acid
A) 2 B) 4 C) 1 D) 3
A) 18 B) 9 C) 5 D) 7
A) n-isomers B) linear alkanes C) cycloalkanes D) isobutanes
A) neopentane B) 2,2-dimethylbutane C) 3-methylhexane D) n-butane
A) branched B) linear C) unbranched D) cyclic
A) C4H8 B) C4H10 C) C4H6 D) C4H12
A) Olefin B) Alkene C) Acetylene D) Paraffin
A) 16.04 u B) 14.03 u C) 1.01 u D) 12.01 u
A) Alk B) X C) R D) Ar
A) CnH2n-2 B) CnHn C) CnH2n D) CnH2n+2
A) At least one double bond B) All single bonds C) At least one triple bond D) Aromatic rings only
A) Energy storage proteins B) Photosynthetic catalysts C) Structural sugars D) Protective waxes
A) Polarity B) Hydrophilicity C) Ionization D) Lipophilicity
A) They sink to the bottom. B) The lower layer. C) They dissolve completely. D) The upper layer.
A) Highly reactive B) Metal-like C) Lacking affinity D) Strong acid
A) Heterolytic mechanism B) Homolytic mechanism C) Condensation mechanism D) Ionic recombination
A) Solid acids B) Metallic oxides C) Noble gases D) Liquid bases
A) Nickel B) Platinum C) Zeolites D) Silica-alumina
A) Eliminate the octane number B) Raise the octane number C) Reduce the boiling point D) Lower the octane number
A) Methane B) Propane C) Butane D) Ethane
A) Silica B) Platinum C) Alumina D) Nickel
A) Uranus B) Neptune C) Saturn D) Jupiter
A) Ganymede B) Europa C) Titan D) Io
A) Huygens probe B) Curiosity rover C) Voyager probe D) Cassini mission
A) Hale-Bopp B) Hyakutake C) Halley D) Encke
A) Meteorites B) Deep-sea volcanic vents C) The Sun D) The Moon's core
A) Alkyne B) Free radical C) Carbocation D) Neutral ion |