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Chapter 6, Review 3
Test Description: Final questions offered as a test review for this chapter
Instructions: Answer all questions to get your test result.
1) What type of macromolecule stores an organism's genetic information?
A
DNA
B
protein
C
carbohydrate
D
lipid
2) The best example of a solution is:
A
seawater
B
milk
C
paint
D
blood
3) The property that is responsible for the fact that water and oil do not mix is:
A
mass
B
phase
C
density
D
polarity
4) Two substances combine producing heat is evidence that a chemical reaction happened.
A
Yes, energy is absorbed
B
No, heat is not a chemical
C
Yes, energy is released
D
No, this is a physical change
5) Elements are pure substances made up of only one kind of:
A
element
B
atom
C
bond
D
molecule
6) What increases the rate of a reaction by lowering the activation energy?
A
nucleic acid
B
enzyme
C
sugar
D
catalyst
7) The bond due to the electrostatic attraction between adjacent water molecules is called:
A
hydrogen bond
B
polar bond
C
ionic bond
D
covalent bond
8) A neutral atom contains 18 protons, how many electrons does it contain?
A
18
B
12
C
0
D
9
9) What type of chemical reaction takes place when heat is released into the environment?
A
endothermic
B
polar
C
exothermic
D
catalytic
10) Elements in Group 1 in the periodic table of the elements have how many outer electrons?
A
4
B
8
C
0
D
1
*select an answer for all questions
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