AP Chemistry - Unit 2 Review

Quiz
•
Chemistry
•
11th Grade
•
Medium
+1
Standards-aligned
Corinne Lindemann
Used 213+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
Ionic substances will have high melting points due to their high lattice energy.
Tags
NGSS.HS-PS1-3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following molecules is nonpolar?
HF
Answer explanation
Though the C-F bond will be very polar due to the difference in electronegativity, the symmetry of this molecule makes it nonpolar.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following substances will have the highest melting point? Hint - think about lattice energy and Coulomb's Law.
NaCl
NaF
Answer explanation
Magnesium has a larger charge (+2) compared to sodium (+1). The fluorine ion will be much smaller than chlorine, and therefore, the ions will be more tightly packed (and harder to separate) in MgF2.
Tags
NGSS.HS-PS1-3
NGSS.HS-PS2-4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bronze is a(n) ______ alloy.
Interstitial
Intertwined
Substitutional
Substertial
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine the formal charge on the central atom of the nitrate ion.
+1
0
-1
-2
Answer explanation
To determine formal charge, remember:
valence - "dots" - "sticks"
valence electrons - lone pairs - (bonded electrons/2)
For this ion, nitrogen is the central atom:
5 valence - 0 lone pairs - 4 bonds = 1
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phosphorus pentachloride will have which molecular geometry?
Trigonal planar
Trigonal pyramidal
Trigonal bypyramidal
Octahedral
Answer explanation
Memorize these geometries!
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the bond hybridization of the central carbon in dichloromethane?
sp
Answer explanation
To determine hybridization, count the total number of bonds and lone pairs on the central atom.
The carbon atom in CH2Cl2 has 4 bonds and no lone pairs; therefore, it has sp3 hybridization.
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
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