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Chemical Combination Questions

The document contains a series of questions related to chemical bonding, including the reasons atoms form bonds, types of bonds, and properties of compounds. It also includes theoretical questions on balancing chemical equations and differentiating between types of bonding. Additionally, it asks for an explanation of the uniqueness of ammonium chloride.

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olamhen
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19 views2 pages

Chemical Combination Questions

The document contains a series of questions related to chemical bonding, including the reasons atoms form bonds, types of bonds, and properties of compounds. It also includes theoretical questions on balancing chemical equations and differentiating between types of bonding. Additionally, it asks for an explanation of the uniqueness of ammonium chloride.

Uploaded by

olamhen
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Answer all questions

1. What is the primary reason atoms form chemical bonds?


a) To gain energy
b) To become unstable
c) To attain a noble gas electron configuration
d) To lose all electrons

2. Which of the following elements is least likely to form chemical bonds?


a) Sodium
b) Chlorine
c) Neon
d) Oxygen

3. What is the charge of a cation?


a) Negative
b) Positive
c) Neutral
d) Variable

4. What type of bond involves the complete transfer of electrons from one atom to another?
a) Covalent bond
b) Ionic bond
c) Metallic bond
d) Dative bond

5. Which of the following compounds is formed by ionic bonding?


a) CH₄
b) H₂O
c) NaCl
d) O₂

6. Which factor favors the formation of ionic bonds?


a) High electronegativity difference between atoms
b) Low electronegativity difference between atoms
c) Presence of noble gases
d) Equal sharing of electrons

7. A dative covalent bond differs from a regular covalent bond because:


a) Electrons are transferred
b) Both shared electrons come from one atom
c) The bond is weaker than a covalent bond
d) It involves metal atoms

8. Which of the following is a property of covalent compounds?


a) High melting points
b) Conductivity in molten state
c) Solubility in organic solvents
d) Formation of ions in solution

9. Metallic bonding is characterized by:


a) Sharing of electrons between two atoms
b) Transfer of electrons from metals to non-metals
c) A sea of delocalized electrons surrounding metal cations
d) Weak intermolecular forces

10. Which intermolecular force is the strongest?


a) Van der Waals forces
b) Dipole-dipole forces
c) Hydrogen bonding
d) Ionic bonding

Theory
1. Balance the following equations

i. C(s) + H₂O(g) ← CO(g) + H₂(g)

ii. NH,(g) + O2(g) ← H₂O(g) + N₂(g)

iii. Cu₂S(s) + O2(g) → Cu₂O(s) + SO2(g)

2. Differentiate between covalent, ionic, and metallic bonding in terms of electron


movement, bond strength, and properties of compounds formed.

3. Briefly explain the uniqueness of ammonium chloride

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