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
pa answer po
Answers & Comments
14.B
15.A
16.B
17.D
18.A
19.C
20.C
21.A
22.C
23.B
24.D
25.A
Hope it helps
A. Nuclear Fusion B. Nuclear Fission C. Nuclear Reactions
10. Reactions involving atomic nuclei.
11. Combines two light nuclei to form bigger nuclei.
12. Involves splitting of a heavy nucleus into two nuclei of smaller mass.