Biology - Section 1.1 Chemical Fundamentals Quiz
26 Questions
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SBI 4U1: BIOLOGY - CHAPTER 1: SECTION 1. 1 CHEMICAL FUNDAMENTALS QUIZThis quiz is a replication of the actual quiz administered in class. Please report any mistakes/discrepancies.
Questions and Answers
- 1.Which of the following is the essential characteristic of a polar molecule?
- A.
Contains double or triple bonds
- B.
Is formed at extremely low temperatures
- C.
Contains ions as part of the structure
- D.
Has an asymmetrical distribution of electrical charge
- E.
Contains the element oxygen
- 2.One of the ways organisms maintain a stable internal environment (homeostasis) is to use buffers to keep the pH of their body fluids within narrow limits. A biology student mixes 200 mL of a buffered solution with a pH of 4 (solution 'X') with 200 mL of a base (solution 'Y'). After mixing, the pH of the resulting solution (solution 'Z') was found to have risen to 5. Which of the following statements can be made in connection with the experiment described?1. Solution 'Z' contains more hydroxyl ions per unit volume than solution 'Y'2. There were 10 times as many hydronium ions in solution 'X' per unit volume than there were in solution 'Z'3. Solution 'Z' contains a higher concentration of hydronium ions than solution 'X'4. Solution 'Y' used up all of the buffering action of solution 'X'5. The pH of solution 'B' was 8
- A.
2, 3, and 4
- B.
1, 2, and 5
- C.
1, 2, 3, 4, and 5
- D.
2 and 4
- E.
3 and 4
- 3.Which three of the following are characteristics of hydrogen bonds?1. They are responsible for the surface tension properties of water.2. They are responsible for the relatively high boiling point of water.3. They are strong than ionic bonds.4. They are present in all substances.5. They are weaker than covalent bonds.
- A.
1, 2, and 5
- B.
2, 3, and 4
- C.
3, 4, and 5
- D.
1, 3, and 4
- E.
1, 3, and 5
- 4.When atoms from two different elements are brought together under conditions that will favour a reaction and the have similar electronegativities, which type of chemical bond is most likely to form?
- A.
Ionic bond
- B.
Polar covalent bond
- C.
Nonpolar covalent bond
- D.
London forces
- E.
Hydrogen bond
- 5.A chemical bond involving carbon and hydrogen (C-H) is present in many biological molecules. Based upon their electronegativities, the bond could be described as:
- A.
Both ionic and covalent
- B.
A covalent bond
- C.
A weak ionic bond
- D.
A strong ionic bond
- E.
A hydrogen bond
- 6.In looking at the periodic table, the following information would be found about nitrogen:147NFrom the above, it can be determined that an atom of nitrogen has the following characteristics:
- A.
It has 2 protons in the first energy level and 5 protons in the second energy level
- B.
It has 7 neutrons and 4 electrons
- C.
It has 7 protons, 14 neutrons, and 7 electrons
- D.
It has an atomic number of 14 and contains 7 protons
- E.
It has an atomic mass of 14 atomic mass units and 7 electrons
- 7.Element 'X' has 7 electrons in the outermost energy level of each of its atoms. Atoms of element 'Y' also contain 7 electrons in the outermost energy level. However, when neutral, element 'Y' has a much lower atomic mass. Therefore:
- A.
Element 'X' has a lower electronegativity than element 'Y'
- B.
Both elements will tend to give up an electron to become chemically stable
- C.
Both elements will form covalent bonds more readily than ionic bonds
- D.
It is highly probable that these elements will form polar covalent molecules
- E.
There is not enough information to answer this question
- 8.Isomers are molecules that:
- A.
Have the same molecular formula
- B.
Differ in the number of unsaturated bonds
- C.
React readily with one another
- D.
Must contain the same functional group
- E.
Have different molecular masses
- 9.In living organisms, buffers do which of the following?
- A.
Neutralize the effect of enzymes
- B.
Allow the pH of cells to change without affecting the actions of the enzymes
- C.
Prevent charged particles from entering cells
- D.
Maintain cytoplasm in a fluid condition
- E.
Maintain pH in the cells within a narrow range, allowing enzymes to function
- 10.By what factor would the concentration of hydrogen (hydronium) ions be decreased if the pH of a solution changed from 4.5 to 6.5?
- A.
5
- B.
20
- C.
2
- D.
100
- E.
10
- 11.How many electrons are involved in each covalent bond?
- A.
2
- B.
6
- C.
1
- D.
8
- E.
4
- 12.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box.What makes water a highly polar molecule? ______Terms:1. London dispersion2. Polar covalent bonds and symmetrical structure3. Intermolecular4. Hydrophobic5. Van der Waals forces6. Hydrogen bond7. Polar covalent bonds and asymmetrical structure8. Intramolecular9. Hydrophilic10. Dipole-dipole
- 13.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What are bonds between molecules called? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 14.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What is the only force of attraction between noble gases? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 15.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What force is responsible for holding polar molecules to one another? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 16.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What dipole-dipole force results between H and either N, O or F? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 17.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What is the collective name for intermolecular bonding? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 18.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What is a property of nonpolar molecules? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 19.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What is a property of polar molecules? ______ Terms: 1. London dispersion 2. Polar covalent bonds and symmetrical structure 3. Intermolecular 4. Hydrophobic 5. Van der Waals forces 6. Hydrogen bond 7. Polar covalent bonds and asymmetrical structure 8. Intramolecular 9. Hydrophilic 10. Dipole-dipole
- 20.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What particle of an atom carries a positive charge? ______ Terms: 1. Isomer2. Electron3. Nucleus4. Tracers5. Neutron6. Isotopes7. Proton8. Half-life9. Radioisotopes10. Positron
- 21.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What particle of an atom carries a negative charge? ______ Terms: 1. Isomer 2. Electron 3. Nucleus 4. Tracers 5. Neutron 6. Isotopes 7. Proton 8. Half-life 9. Radioisotopes 10. Positron
- 22.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What particle of an atom carries a neutral charge? ______ Terms: 1. Isomer 2. Electron 3. Nucleus 4. Tracers 5. Neutron 6. Isotopes 7. Proton 8. Half-life 9. Radioisotopes 10. Positron
- 23.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What are atoms of the same element with different mass numbers called? ______ Terms: 1. Isomer 2. Electron 3. Nucleus 4. Tracers 5. Neutron 6. Isotopes 7. Proton 8. Half-life 9. Radioisotopes 10. Positron
- 24.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What kind of atoms spontaneously decay? ______ Terms: 1. Isomer 2. Electron 3. Nucleus 4. Tracers 5. Neutron 6. Isotopes 7. Proton 8. Half-life 9. Radioisotopes 10. Positron
- 25.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What is the time for half of the atoms in a sample to decay called? ______ Terms: 1. Isomer 2. Electron 3. Nucleus 4. Tracers 5. Neutron 6. Isotopes 7. Proton 8. Half-life 9. Radioisotopes 10. Positron
- 26.Match an item in the list of terms to the statement below. Enter your numbered choice in the text box. What is a useful application of unstable atoms? ______ Terms: 1. Isomer 2. Electron 3. Nucleus 4. Tracers 5. Neutron 6. Isotopes 7. Proton 8. Half-life 9. Radioisotopes 10. Positron
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