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Chemistry Practice Exam-VERIFIED BY EXPERTS-GRADED A+

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4U Chemistry Practice Exam Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Name CH3CH(OH)CH3. a. iso-ethanol b. tertiary-propanol c. butanol d. propanol e. 2-propanol ____ 2. Which organic compound is unsaturated? a. ethylcyclopentane b. 2-methyl-3-ethylpentyne c. 1,1-dimethylhexane d. cyclohexane e. 1,3,5-trimethyloctane ____ 3. To which family of organic compounds does CH3COCH2CH2CH3 belong? a. alcohol b. aldehyde c. alkyne d. ketone e. carboxylic acid ____ 4. What is the difference between an amine and an amide? a. There is no carbon-oxygen bond in an amine, but there is in an amide. b. Amines are non-polar molecules. c. Amines always have a larger molecular weight than amides. d. Amines always have a nitrogen atom attached to two carbon atoms. e. Amines can be found in proteins, but amides can not. ____ 5. Why does the boiling point of an alkane increase as its chain length increases? a. There is more hydrogen bonding. b. There are more hydrogen atoms available for hydrogen bonds to form. c. The number of dipole-dipole interactions increases. d. The strength of the dispersion forces increases with increased molecular size. e. Heavier molecules cannot float on the surface of water as well. ____ 6. How many unshared electron pairs are found in a molecule of formaldehyde, HNCHO? Hint: Draw a Lewis structure to help you answer this question. a. none b. three c. two d. four e. one ____ 7. How many isomers have the molecular formula C5H10O?a. four b. five c. six d. seven e. three ____ 8. What type of reaction occurs when bromine reacts with pentyne to make dibromopentene? a. substitution b. isomerism c. oxidation d. reduction e. addition ____ 9. Which reaction might form cis-trans isomers? a. addition to an alkene b. addition to an alkyne c. elimination of benzene d. reduction of an alcohol e. substitution of an alkane ____ 10. Which situation must be true for two electrons to occupy the same orbital? a. The electrons must have the same principal quantum number, but the other quantum numbers must be different. b. The electrons must have the same spin. c. The electrons must have identical sets of quantum numbers. d. The electrons must have low energy. e. The electrons must have the opposite spin. ____ 11. An electron has the following set of quantum numbers: n = 3, l = 1, ml = 1, ms = . In which orbital is this electron found? a. 3s b. 3p c. 3d d. 3f e. 4p ____ 12. Which set of quantum numbers is not possible? a. n = 3, l = 0, ml = 0, ms = b. n = 5, l = 3, ml = 2, ms = c. n = 4, l = 3, ml = 1, ms = d. n = 5, l = 3, ml = 3, ms = e. n = 4, l = 4, ml = 2, ms =

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