1. Organic compounds are compounds that:come from living or once-living substances are hydrocarbons are necessary to life contain carbon are not manufactured by humans 2. The first organic compound to be synthesized in a chemist’s laboratory was:cholesterol chlorophyll methane benzene urea 3.Hydrocarbons are compounds composed of:carbon and hydrogen carbon and water carbon, hydrogen and oxygen carbon, hydrogen and water carbon, oxygen and water 4. The molecular formula of methane is:CH2 CH3 CH CH4 C2H2 5. An alkane is defined by:its reaction with sodium its molecular formula the products it produces on combustion its origin in petroleum its physical properties 6.Of the following, the statement that is not true of all alkanes is:All alkanes burn to produce CO2 and H2O. All alkanes consist of carbon and hydrogen exclusively. All alkanes exist as two or more isomers. All alkanes fit the general molecular formula CnH2n+2. All alkanes are hydrocarbons. 7. Of the following, the molecule that contains a branched structure is:propane butane ethane methane isobutane 8.The IUPAC name of isopentane is:2-methylpentane 3-methylpentane 2-methylbutane 3-methylbutane 1,1-dimethylpropane 9.The compound C3H8is:methane ethane propane butane triptane 10.The compound C7H16is:propylene heptane nonane ethene acetylene 13.A compound that contains a triple bond is:acetylene 2,2,4-trimethylpentane propane benzene isobutane 14.The total number of shared electrons in a carbon-carbon double bond is:2 3 4 5 6 15.The total number of covalent bonds in a molecule of ethane is:4 5 6 7 8 16.The total number of 1o hydrogens in a molecule of pentane is:2 4 6 8 10 17.Isomers share the same:number of protons number of neutrons atomic mass molecular formula IUPAC name 18.f hydrogen can be added to an organic molecule, the molecule is said to be:dehydrogenated underhydrogenated hydrodeficient dehydrogenated unsaturated 19.In organic chemistry, the term aromatic refers to:the presence of C=C double bonds the presence of a ring the presence of a benzene ring a compound with a particularly pleasant odor a compound with fewer hydrogens than required to fit the general formula CnH2n+2
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