Chapter 2.The Chemistry of Life
1. Human chemistry includes .
(A) Organic molecules
(B) Elements
(C) Biochemical
(D) All of above
Ans D Diff Easy Page 42
2. In glucose, there are always six carbon and six oxygen units for every hydrogen units. (A) Three
(B) Six
(C) Twelve
(D) Eighteen
Ans C Diff Medium Page 43
3. The percentage of potassium in human body is .
(A) 0.2 (B) 0.3 (C) 0.4 (D) 0.5
Ans C Diff Medium Page 43
4. Uranium (U), is referred to as a heavy metal and it contains neutrons
(A) 238 (B) 92 (C) 146 (D) 240
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5. The number of protons and neutrons . (A) May be equal for some elements
(B) Are equal for all elements
(C) Both of above
(D) None of above
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6. An isotope is one of the different forms of an element, distinguished from one another by different
numbers of .
(A) Electrons
(B) Protons
, (C) Neutrons
(D) All of above
Ans C Diff Easy Page 46
7. Excessive exposure to radioactive isotopes can cause . (A) Damage of human cells
(B) Birth defects
(C) Cancer
(D) AII of above
Ans D Diff Hard Page 46
8. If you take a look at the periodic table of the elements, you will notice that hydrogen and helium are
placed alone on either sides of the top row; they are the only elements that have .
(A) One electron shells (B) Two electron shells (C) Three electron shells (D) Four electron shells
Ans A Diff Medium Page 47
9. The most common example of in the natural world occurs between molecules of water
(A) Ionic bonding
(B) Covalent bonding (C) Hydrogen bonding (D) AII of above
Ans C Diff Hard Page 53
10 is the energy of position, or the energy matter possesses because of the positioning or
structure of its components.
(A) Kinetic energy
(B) Chemical energy
(C) Potential energy
(D) None of above
Ans C Diff Easy Page 54
1. Human chemistry includes .
(A) Organic molecules
(B) Elements
(C) Biochemical
(D) All of above
Ans D Diff Easy Page 42
2. In glucose, there are always six carbon and six oxygen units for every hydrogen units. (A) Three
(B) Six
(C) Twelve
(D) Eighteen
Ans C Diff Medium Page 43
3. The percentage of potassium in human body is .
(A) 0.2 (B) 0.3 (C) 0.4 (D) 0.5
Ans C Diff Medium Page 43
4. Uranium (U), is referred to as a heavy metal and it contains neutrons
(A) 238 (B) 92 (C) 146 (D) 240
Ans C Diff Medium Page 44
5. The number of protons and neutrons . (A) May be equal for some elements
(B) Are equal for all elements
(C) Both of above
(D) None of above
Ans A Diff Medium Page 45
6. An isotope is one of the different forms of an element, distinguished from one another by different
numbers of .
(A) Electrons
(B) Protons
, (C) Neutrons
(D) All of above
Ans C Diff Easy Page 46
7. Excessive exposure to radioactive isotopes can cause . (A) Damage of human cells
(B) Birth defects
(C) Cancer
(D) AII of above
Ans D Diff Hard Page 46
8. If you take a look at the periodic table of the elements, you will notice that hydrogen and helium are
placed alone on either sides of the top row; they are the only elements that have .
(A) One electron shells (B) Two electron shells (C) Three electron shells (D) Four electron shells
Ans A Diff Medium Page 47
9. The most common example of in the natural world occurs between molecules of water
(A) Ionic bonding
(B) Covalent bonding (C) Hydrogen bonding (D) AII of above
Ans C Diff Hard Page 53
10 is the energy of position, or the energy matter possesses because of the positioning or
structure of its components.
(A) Kinetic energy
(B) Chemical energy
(C) Potential energy
(D) None of above
Ans C Diff Easy Page 54
