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