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Polarity
Test Description: Unit 6 Polarity Review
Instructions: Answer all questions to get your test result.
1) The periodic trend for electronegativity values:
A
Increases going down a group and increases going across a period
B
Increases going down a group and decreases going across a period
C
Decreases going down a group and increases going across a period
D
Decreases going down a group and decreases going across a period
2) Which molecule contains as nonpolar bond?
A
Nitorgen monoxide (NO)
B
Hygrogen Chloride (HCl)
C
Fluorine gas (F2)
D
Potassium Iodide (KI)
3) Which statement is true about Polar Molecules?
A
They are symmetrical
B
They dissolve with Ionic compounds
C
They have similar charges on each end.
D
They dissolve with non-polar compounds
4) Does sand (SiO2) dissolve in water?
A
Yes, because ionic dissolves in polar
B
No, beacuse non polar does not dissolve with polar
C
Yes, because polar dissolves with non polar
D
No, because polar does not dissolve with non polar
5) Distillation separates two _______ by using different _____________.
A
solids, particle size
B
gases, densities
C
liquids, particle size
D
liquids, boiling points
6) Which best describes the shape and polarity of CH4 ?
A
Tetrahedral Nonpolar
B
Tetrahedral Polar
C
Trigonal Pyramidal Polar
D
Trigonal Pyramidal Non Polar
7) Which molecule has a polar covalent bond?
A
H - F
B
F - F
C
K - F
D
Na - F
8) If water does not dissolve nail polish, then which statement is true?
A
Water is polar and nail polish is polar
B
Water is non polar and nail polish is non polar
C
Water is polar and nail polish is non polar
D
Water is polar and nail polish is ionic
9) Which best describes why water is polar?
A
Water is covalent
B
Water has no lone pairs on the central atom
C
Water is a linear molecule
D
Water is a bent molecule
10) Which best describes a polar bond?
A
Unequal pull between the shared electron(s)
B
Unequal transfer of electrons resulting in a positive and negative ion
C
Equal transfer of electrons resulting in a positive and negative ion
D
Equal pull beween the shared electron(s)
*select an answer for all questions
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