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