A
In a ________ reaction, two or more elements or compounds form one product.
A) decomposition
B) single replacement
C) combustion
D) double replacement
E) combination
E) combination
What is the name of the compound Fe₂O₃?
A) Iron(I) oxide
B) Iron(II) oxide
C) Iron(III) oxide
D) Iron(IV) oxide
C) Iron(III) oxide
1. What is the charge on Sn in the ionic compound SnO?
A) +1
B) +2
C) +3
D) +4
Answer: B) +2
Which compound contains both ionic and covalent bonds?
A) NaCl
B) CO₂
C) NaNO₃
D) CH₄
C) NaNO₃
Which of the following correctly gives the correct coefficients for the reaction below?
N2H4(g) + H2O2(l) → N2(g) + H2O(g)
A) 1, 1, 1 ,1
B) 1, 2, 1, 4
C) 2, 4, 2, 8
D) 1, 4, 1, 4
E) 2, 4, 2, 4
B) 1, 2, 1, 4
In an oxidation-reduction reaction, the substance oxidized always
A) takes on oxygen atoms.
B) experiences a loss of electrons.
C) gives up hydrogen atoms.
D) experiences a gain of electrons.
E) becomes a charged species.
B) experiences a loss of electrons.
The following reaction takes place when an electric current is passed through water. It is an example of a ________ reaction.
2H2O(l) → 2H2(g) + O2(g)
A) combination
B) single replacement
C) combustion
D) decomposition
E) double replacement
D) decomposition
Which of the following is the strongest intermolecular force present in HF?
A) Dispersion
B) Dipole-dipole
C) Ion-dipole
D) Hydrogen bonding
Answer: D) Hydrogen bonding
What type of bonding is present in CO₂? What polarity is the molecule?
A) Nonpolar covalent, polar overall
B) Polar covalent, nonpolar overall
C) Nonpolar covalent, polar overall
D) Polar covalent, polar overall
B) Polar covalent, nonpolar overall
How many grams of glucose (C6H12O6) are in 3.55 moles of glucose?
A) 180. g
B) 639 g
C) 103 g
D) 426 g
E) 50.7 g
B) 639 g
What is the molecular geometry of NH₃? Electron geometry?
A) Molecular: Trigonal planer / Electron: Tetrahedral
B) Molecular: Tetrahedral / Electron: Trigonal planer
C) Molecular: Trigonal pyramidal / Electron: Tetrahedral
D) Molecular: Tetrahedral / Electron: Trigonal pyramidal
C) Molecular: Trigonal pyramidal / Electron: Tetrahedral
Which of the following has the smallest bond angle?
A) CH₄
B) NH₃
C) H₂O
D) CO₂
Answer: C) H₂O