12. Involves splitting of a heavy nucleus into two nuclei of smaller mass.

13. The following statements are true about Aristottle’s notion of elements EXCEPT one:

    A. Aside from air, water, fire and Earth, he added the 5th element Sun.

    B. He stated that air was wet and hot.

    C. He stated that fire was hot and dry

    D. He stated that water was wet and cold.

14. Which of the following statements is true about Aristotle’s notion of Ether?

    A. He thought that Ether was the finest of all substances.

    B. It is not associated with heavenly realm.

    C. It will never be hot or cold and neither wet nor dry.

    D. It will always be hot or cold and neither wet nor dry.

15. He was known as the Father of Periodic Table,

    A. Johann Wolfgang Doberiner        C. John Newlands

    B. Dimitri Mendeleev                D. Henry Mosely

16. The electrons in a polar covalent molecule are shared…

    A. Evenly    B. Electrons are not shared        C. Unevenly    D. None of the above

17. The electrons in a nonpolar covalent molecule are shared…

    A. Evenly    B. Electrons are not shared        C. Unevenly    D. None of the above

18. The electrons in an ionic molecule are shared…

    A. Evenly    B. Electrons are not shared        C. Unevenly    D. None of the above

19. What must the difference in electronegativity between two atoms be in order for the bond between them to be polar covalent.

    A. less than 0.4        C. greater than 1.7

    B. between 0.4 and 1.7    D. exactly 0

20. Which of the following geometries could be nonpolar?

    A. bent                C. tetrahedral

    B. trigonal primidal        D. none of the above

21. Which of the following has the highest boiling point?

    A. H2        B. NH2    C. N2        D. O2

22. Which of the following has the highest boiling point?

        I. Carbohydrates

        II. Proteins

        III. Fats

    A. I and II only        C. II and III only

    B. I and III only        D. I, II and III

23. What group of biological molecules contains DNA and RNA…

    A. Nucleic Acids        C. Carbohydrates

    B. Proteins            D. Lipids

24. Which of the following biological molecules contains the element nitrogen?

    A. Carbohydrates        C. Proteins

    B. Fats                D. all of the above

25. A group of organic molecules that includes sugars, starch, and cellulose care called…

    A. Nucleic Acids        C. Carbohydrates

    B. Proteins            D. Lipids



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