1. How many valence electrons does a carbon atom have? (1 point) 1 2 3 4 2. How many double covalent

1. How many valence electrons does a carbon atom have? (1 point) 1 2 3 4 2. How many double covalent bonds are in an alkane? (1 point) 0 1 2 3 3. What is the general formula for a straight-chain alkane? (1 point) CnHn CnHn+2 CnH2n CnH2n+2 4. Why are the molecules of hydrocarbons nonpolar? (1 point) The intermolecular attractions are strong. All the bonds are single covalent bonds. The electron pair is shared almost equally in all the bonds. Van de Waals forces overcome polarity. 5. In which of the following compounds does rotation occur around all covalent bonds between carbons? (1 point)
1. How many valence electrons does a carbon atom have? (1 point) 1 2 3 4 2. How many double covalent bonds are in an alkane? (1 point) 0 1 2 3 3. What is the general formula for a straight-chain alkane? (1 point) CnHn CnHn+2 CnH2n CnH2n+2 4. Why are the molecules of hydrocarbons nonpolar? (1 point) The intermolecular attractions are strong. All the bonds are single covalent bonds. The electron pair is shared almost equally in all the bonds. Van de Waals forces overcome polarity. 5. In which of the following compounds does rotation occur around all covalent bonds between carbons? (1 point) octene octyne octane all of the above 6. An organic compound that contains only carbon and hydrogen and at least one carbon-carbon triple bond is classified as an ____. (1 point) alkane alkene alkyne arene 7. Which of the following compounds is a structural isomer of butane? (1 point) 2-methylbutane 2, 2-dimethylbutane 2-methylpropane 2, 2-diethylpropane 8. Which hydrocarbon rings are most common in nature? (1 point) rings with 3 or 4 carbon atoms rings with 4 or 5 carbon atoms rings with 5 or 6 carbon atoms rings with 6 or 7 carbon atoms 9. What is the first stage in the formation of coal? (1 point) lignite anthracite coal peat bituminous coal 10. What is the first step in the refining of petroleum? (1 point) cracking drilling cooling distillation 11. Which of the following compounds is trichloromethane? (1 point) 12. Which pair of formulas represents the same compound? (1 point) C2H5OH; CH3OCH3 CH3CH2CHO; CH3CH2COOH (CH3)2CO; CH3OCH CH3COH(CH3)2; (CH3)3COH 13. What substance is added to an organic molecule to test for the degree of saturation? (1 point) water hydrogen gas bromine hydrogen bromide 14. Which of the following compounds has the lowest boiling point? (1 point) diethyl ether 2-butanol diphenyl ether 4-octanol What is the name of the following compound? 15. (1 point) phenylhyde cyclohexylhyde benzaldehyde phenol aldehyde What is the name of the following compound? 16. (1 point) butane butanal butanol butanone 17. The IUPAC name for the carboxylic acid with two carbons in a straight chain would be ____. (1 point) ethanalic acid dimethylmethanoic acid methacarboxylic acid ethanoic acid 18. When an oxygen atom is attached to a carbon atom, the carbon atom becomes more ____. (1 point) oxidized reduced acidic basic 19. Which of the following compounds is the most reduced? (1 point) ethene carbon dioxide propanone ethane

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