Quiz: Take The Ultimate Chemistry Exam Test!

23 Questions | By Clynnbass | Last updated: Mar 20, 2022 | Total Attempts: 419

Questions

Settings

Create your own Quiz

Quiz: Take The Ultimate Chemistry Exam Test! - Quiz

Questions and Answers

1.

Which one of the following is most likely to be an ionic compound?
- A.
  
  CH4
- B.
  
  O2
- C.
  
  CaCl2
- D.
  
  NH3
2.

Which of the following compounds has the greatest lattice energy?
- A.
  
  KBr
- B.
  
  KCl
- C.
  
  KI
- D.
  
  KF
3.

Based on the tendency of atoms to gain or lose electrons to fulfill the octet rule, which of the following ions has an incorrect charge?
- A.
  
  Na+
- B.
  
  O2-
- C.
  
  Ca2-
- D.
  
  Cl-
4.

Which of the following diatomic molecules has the longest bond length?
- A.
  
  N==N
- B.
  
  Br-Br
- C.
  
  F-F
- D.
  
  O==O
5.

The measure of an atoms ability to attract electrons towards itself in a chemical bond is known as?
- A.
  
  Electronegativity
- B.
  
  Bond strength
- C.
  
  Electron affinity
- D.
  
  Bond order
6.

Which of the following compounds has the greatest bond polarity?
- A.
  
  Cl-Br
- B.
  
  Cl-Cl
- C.
  
  NH3
- D.
  
  H-F
7.

Calculate the oxidation number of the nitrogen atom in NH3.
- A.
  
  0
- B.
  
  +1
- C.
  
  -1
- D.
  
  -3
8.

Which metal would most likely have the highest melting point?
- A.
  
  Li
- B.
  
  Na
- C.
  
  Ca
- D.
  
  K
9.

Which bond type best describes the type of bond that will form between O and H?
- A.
  
  Nonpolar convalent
- B.
  
  Mostly ionic
- C.
  
  Mostly covalent
- D.
  
  Polar covalent
10.

Based on your knowledge of bond energy, which of the following compounds would release the most energy during combustion?
- A.
  
  CH4
- B.
  
  C2H6
- C.
  
  C3H8
- D.
  
  C2OH6
11.

Use VSEPR theory to predict the geometry of the SF6 molecule.
- A.
  
  T-shaped
- B.
  
  Trigonal bipyramidal
- C.
  
  Tetrahedral
- D.
  
  Octaheadral
12.

The bond angles found in a molecule with AX5 geometry are?
- A.
  
  90 degrees
- B.
  
  120 degrees
- C.
  
  90 and 120 degrees
- D.
  
  109.5 degrees
13.

Which of the following bonds has the most ionic character
- A.
  
  C-H
- B.
  
  H-F
- C.
  
  Na-I
- D.
  
  K-F
14.

What is the CN bond order in H3CCN (assume all atoms obey the octet rule)?
- A.
  
  -1
- B.
  
  +1
- C.
  
  0
- D.
  
  +3
15.

What is the formal charge on the nitrogen in hydroxylamine, H2NOH?
- A.
  
  -1
- B.
  
  0
- C.
  
  +1
- D.
  
  +5
16.

Which of the following has the smallest bond angles?
- A.
  
  CO2
- B.
  
  NH3
- C.
  
  SO3
- D.
  
  XeF4
17.

Which molecule has no dipole moment?
- A.
  
  BrF3
- B.
  
  SO2
- C.
  
  XeBr4
- D.
  
  H2O
18.

Which of the following molecules is linear?
- A.
  
  NH3
- B.
  
  H2O
- C.
  
  H2S
- D.
  
  CO2
19.

Which of the following statements is true of methane, CH4?
- A.
  
  It is a tetrahedral molecule
- B.
  
  It is a polar molecule
- C.
  
  It contains single and double bonds
- D.
  
  It contains 60% nitrogen by weight
20.

Using the bond energies, calculate the enthalpy change for the following combustion reaction.
- A.
  
  -92 kJ/mol
- B.
  
  +921 kJ/mol
- C.
  
  -621 kJ/mol
- D.
  
  +621 kJ/mol
21.

In the Lewis structure of nitrogen dioxide, NO2, how many pairs of electrons are bonding and how many are non-bonding?
- A.
  
  5 pairs bonding, 4 pairs non-bonding
- B.
  
  3 pairs bonding, 4 pairs non-bonding
- C.
  
  4 pairs bonding, 4 pairs non-bonding
- D.
  
  2 pairs bonding, 2 pairs non-bonding
22.

Indicate the molecular geometry and the net dipole moment of H3CF
- A.
  
  Tetrahedral, AX4; net dipole moment arrow pointing to the right
- B.
  
  Pyramidal; net dipole moment arrow point to the left
- C.
  
  Bent; net dipole moment arrow pointing to the right
- D.
  
  Planar tetrahedral; net dipole moment arrow pointing to the right
23.

Briefly explain why Co2 is non-polar and OCS is polar.
- A.
  
  CO2; O==C==O no dipole moment, cancels each out; OCS; O==C==S, contains a dipole moment,does not cancel each out
- B.
  
  CO2 O==C==O contains a dipole moment, does not cancel each other out; OCS O==C==) no dipole moment, cancel each out