Chapter 02 Basic Chemistry Multiple Choice Questions



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Chapter 02

Basic Chemistry

 


Multiple Choice Questions
 

1.  Which of the following elements would be more reactive with other elements?  


A.  boron, #5
B.  neon, #10
C.  argon, #18
D.  helium, #2

 


Bloom's Level: 3. Apply
Learning Outcome: 02.01.04 Determine how electrons are configured around a nucleus.
Section: 02.01
Topic: Chemistry
 

2.  Which of the following would be a proposed mechanism by which stomach antacids work?  


A.  Antacids dilute the solution, therefore lowering the pH.
B.  Antacids are bases and by definition can absorb H+ out of a solution.
C.  Antacids are bases and by definition can absorb OH- out of a solution.
D.  Antacids contain mostly water and so they neutralize the solution.

 


Bloom's Level: 2. Understand
Learning Outcome: 02.04.03 Analyze how buffers prevent large pH changes in solutions.
Section: 02.04
Topic: Chemistry
 

3.  If you place the corner of a paper towel into a droplet of water the water moves across the paper towel. Which of the following would explain the movement of the water?  


A.  surface tension
B.  cohesion
C.  adhesion
D.  both cohesion and adhesion

 


Bloom's Level: 3. Apply
Learning Outcome: 02.03.01 Describe how water associates with other molecules in solution.
Section: 02.03
Topic: Chemistry
 

4.  Which of the following elements is NOT one of the six most common elements in living organisms?  


A.  carbon
B.  oxygen
C.  iron
D.  nitrogen
E.  hydrogen

Incorrect Answers: A. Carbon is one of the six most common elements in living organisms.

 


Bloom's Level: 1. Remember
Learning Outcome: 02.02.01 Describe how elements are combined into compounds and molecules.
Section: 02.02
Topic: Chemistry
 

5.  If the atomic number of an element is 6 and the atomic mass is 12.01, how many protons are there in the nucleus?  


A.  12
B.  6
C.  24
D.  52

 


Bloom's Level: 3. Apply
Learning Outcome: 02.01.02 Use the periodic table to evaluate relationships between atomic number and mass number.
Section: 02.01
Topic: Chemistry
 

6.  Which of the following is/are an atom, an isotope and an ion?  


A.  H+
B.  2H or deuterium
C.  3H or tritium
D.  H2 or hydrogen gas
E.  All of the choices are atoms, isotopes and ions.

 


Bloom's Level: 2. Understand
Learning Outcome: 02.01.03 Describe how variations in an atomic nucleus account for its physical properties.
Section: 02.01
Topic: Chemistry
 

    

7.  From the above table of radioisotopes and their properties, it is obvious that  


A.  the longer the half-life, the more energy emitted by the particles.
B.  the longer the half-life, the less energy emitted by the particles.
C.  radioisotopes of the same element must emit the same amount of energy in their emissions and decay at the same rate.
D.  adjusted for time, radioisotopes emit the same amount of energy in their emissions.
E.  energy and half-life are not directly related.

 


Bloom's Level: 3. Apply
Learning Outcome: 02.01.03 Describe how variations in an atomic nucleus account for its physical properties.
Section: 02.01
Topic: Chemistry
 

8.  Which statement is NOT true about subatomic particles?  


A.  Protons are found in the nucleus.
B.  Neutrons have no electrical charge.
C.  Electrons contain much less mass than neutrons.
D.  Electrons are found in orbitals around the nucleus.
E.  All electrons in an atom contain the same amount of energy.

Incorrect Answers: A. It is true that protons are found in the nucleus.

 


Bloom's Level: 1. Remember
Learning Outcome: 02.01.01 Describe how protons, neutrons, and electrons relate to atomic structure.
Section: 02.01
Topic: Chemistry
 

9.  Which is NOT true about the electrical charges in chemistry?  


A.  Protons carry a positive charge.
B.  In an atom, the number of protons and neutrons must be equal.
C.  An atom is neutral when the positive and negative charges balance.
D.  An ion contains one or more positive or negative charges.

Incorrect Answers: A. It is true that protons carry a positive charge.

 


Bloom's Level: 2. Understand
Learning Outcome: 02.01.01 Describe how protons, neutrons, and electrons relate to atomic structure.
Section: 02.01
Topic: Chemistry
 

10.  In a water molecule,  


A.  the oxygen atom is more electronegative than the hydrogen atoms.
B.  the oxygen atom has an overall negative charge with the hydrogen atoms having an overall positive charge.
C.  unequal sharing of electrons results in a polar molecule.
D.  All of the choices are correct.

 


Bloom's Level: 1. Remember
Learning Outcome: 02.02.03 Compare the relative strengths of ionic, covalent, and hydrogen bonds.
Section: 02.02
Topic: Chemistry
 

11.  An atom's atomic mass is best described as the mass of  


A.  the protons it contains.
B.  the neutrons it contains.
C.  electrons in the outermost shell.
D.  protons and neutrons it contains.
E.  protons and electrons it contains.

 


Bloom's Level: 1. Remember
Learning Outcome: 02.01.02 Use the periodic table to evaluate relationships between atomic number and mass number.
Section: 02.01
Topic: Chemistry
 

12.  A research article indicates that researchers have used an isotope 3H to trace a certain metabolic process. From the symbol that is given, we know this is a hydrogen isotope with  


A.  three protons.
B.  three neutrons.
C.  three electrons.
D.  one proton and two neutrons.
E.  two protons and one neutron.

 


Bloom's Level: 3. Apply
Learning Outcome: 02.01.03 Describe how variations in an atomic nucleus account for its physical properties.
Section: 02.01
Topic: Chemistry
 

13.  Both 18O and 16O are found in nature. However, 16O is the most common. Therefore,  


A.  these are different elements.
B.  oxygen atoms can have eight or 10 neutrons.
C.  18O has two additional electrons in its outer shell.
D.  18O is the form of oxygen that provides living cells with life.
E.  only the common form of 16O can bond with hydrogen atoms to form H2O.

 


Bloom's Level: 3. Apply
Learning Outcome: 02.01.01 Describe how protons, neutrons, and electrons relate to atomic structure.
Section: 02.01
Topic: Chemistry
 

14.  To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C and 14N, because over time the 14C-which originated in the atmosphere-breaks down into 14N. What net change occurred for this to happen?  


A.  The 14C lost an electron.
B.  The 14C gained an electron.
C.  The 14C lost a proton.
D.  The 14C gained a proton.
E.  The 14C gained a neutron.

 


Bloom's Level: 4. Analyze
Learning Outcome: 02.01.03 Describe how variations in an atomic nucleus account for its physical properties.
Section: 02.01
Topic: Chemistry
 

 


Essay Questions
 

15.  What does this graph reveal about the heat of vaporization and the heat of fusion?



    

 


Bloom's Level: 6. Create
Learning Outcome: 02.03.03 Analyze how water's solid, liquid, and vapor states allow life to exist on Earth.
Section: 02.03
Topic: Chemistry
 

 

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