Chemical Bonding: Practice Test and Concept Review

1. A covalent chemical bond connects a pair of atoms

   1. potassium and chlorine

   2. calcium and oxygen

   3. sulfur and sodium

   4. chlorine and hydrogen.

2. In which row are the substances with only ionic bonds?

   1. MgS, O2, NH3

   2. HCl, CaS, Cl2

   3. NaCl, K2S, CaBr2

   4. KBr, H2S, SO2

3. In the water molecule, the type of chemical bond is

   1. polar covalent

   2. nonpolar covalent

   3. ionic

   4. metallic

4. The series of compounds where the formulas correspond to compounds with polar covalent, ionic, and nonpolar covalent bonds between atoms, respectively, is

   1. O2, P2O3, PCl5

   2. HCl, Cl2, NaCl

   3. P2O5, Na2S, N2

   4. Ca3P2, H2O, O2

5. Metallic bonding is characteristic of the substance

   1. He

   2. Al

   3. N2

   4. Ar

6. The number of hydrogen bonds that can be formed by each ethanol molecule is

   1. 3

   2. 1

   3. 2

   4. 0

7. Three σ-bonds and two π-bonds between atoms are present in

   1. pentene

   2. ethane

   3. acetylene

   4. propadiene

8. The number of electrons participating in the formation of chemical bonds in an ammonia molecule is

   1. 8

   2. 6

   3. 10

   4. 2

9. In which compound are all carbon atoms in the sp2 hybridization state?

   1. H2C=CH-CH=CH2

   2. H2C=C=CH-CH3

   3. H3C-CH2-C≡CH

   4. H3C-C≡C-CH3

10. One of the bonds in the molecule is formed by a donor-acceptor mechanism in

    1. propane

    2. ammonium chloride

    3. oxygen

    4. hydrogen chloride

Test "Chemical Bond"

In the carbon dioxide molecule, the type of bond is
polar covalent
nonpolar covalent
ionic
metallic

The series of compounds where all the bonds in the compounds are ionic is
O2, Cl2, N2
Cl2, HCl, NaCl
P2O5, PCl5, NH3
Ca3P2, NaF, K2S

Arrange the formulas of the substances in order of increasing strength of the carbon-carbon chemical bond
C2H2
C2H4
C2H6
C6H6

In the molecule of 2-methylbutene-2, the hybridization of the carbon atoms' orbitals is
only sp3
only sp2
sp3 and sp2
sp3 and sp

What type of bond is in the compound formed by a hydrogen atom and an element whose electron distribution is 2,8,6?
ionic
polar covalent
nonpolar covalent
hydrogen

The number of σ-bonds in a benzene molecule is
12
6
3
4

Arrange the formulas of the substances in order of increasing covalent character of the chemical bond
CCl4
BaCl2
BeCl2
KCl

One of the bonds in the molecule is formed by a donor-acceptor mechanism in
ammonium sulfate
sodium sulfate
sulfur dioxide
hydrogen sulfide

Hydrogen bonding is formed between the molecules of
salts
alcohols
simple ethers
complex ethers

Match the names of substances with the number of σ and π bonds in them.
Substance names
A) acetone
B) methylamine
C) acetylene
D) vinyl chloride
Bond numbers
1) 6 σ and 0 π bonds
2) 5 σ and 1 π bonds
3) 9 σ and 1 π bonds
4) 3 σ and 2 π bonds

A
B
C
D

Match the types of chemical bonds in substances with their names.
Types of chemical bonds
A) ionic
B) polar covalent
C) nonpolar covalent
D) metallic
Substance names
1) iodine
2) cesium
3) phosphorus (V) chloride
4) silver chloride

A
B
C
D