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