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WorksheetsChemical Bonding and Reactions
Total questions: 20
Worksheet time: 40mins
Which type of bond involves the complete transfer of electrons from one atom to another?
Covalent bond
Polar covalent bond
Ionic bond
Metallic bond
Which of the following pairs will most likely form an ionic bond?
H and O
Na and Cl
C and H
N and O
What type of bond exists in a Cl₂ molecule?
Ionic
Polar covalent
Non-polar covalent
Metallic
The electronegativity difference between H (2.1) and Cl (3.0) indicates the bond is:
Ionic
Polar covalent
Non-polar covalent
Metallic
Which statement about covalent bonds is correct?
They occur between metals only.
Electrons are completely transferred.
They involve sharing of electrons.
They form cations and anions.
Substances that enter into a chemical reaction are called:
Products
Catalysts
Reactants
Solvents
What type of reaction is represented by: 2Mg + O₂ → 2MgO
Decomposition
Combination
Double replacement
Single replacement
Which of the following is a decomposition reaction?
Na + Cl₂ → NaCl
CaCO₃ → CaO + CO₂
HCl + NaOH → NaCl + H₂O
Zn + CuSO₄ → ZnSO₄ + Cu
Which type of reaction occurs in: Zn + 2HCl → ZnCl₂ + H₂
Combination
Decomposition
Single replacement
Double replacement
The neutralization of HCl by NaOH is an example of:
Synthesis reaction
Single replacement reaction
Double replacement reaction
Decomposition reaction
Balance: ___H₂ + ___O₂ → ___H₂O
H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
H₂ + O₂ → 2H₂O
2H₂ + 2O₂ → 2H₂O
Balance: ___Na + ___Cl₂ → ___NaCl
Na + Cl₂ → NaCl
2Na + Cl₂ → 2NaCl
Na + Cl₂ → 2NaCl
2Na + 2Cl₂ → 2NaCl
Balance: ___Ca(OH)₂ + ___HCl → ___CaCl₂ + ___H₂O
Ca(OH)₂ + HCl → CaCl₂ + H₂O
Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O
Ca(OH)₂ + 2HCl → CaCl₂ + H₂O
2Ca(OH)₂ + 2HCl → 2CaCl₂ + 2H₂O
Balance: ___KClO₃ → ___KCl + ___O₂
KClO₃ → KCl + O₂
2KClO₃ → 2KCl + 3O₂
KClO₃ → 2KCl + 3O₂
2KClO₃ → KCl + O₂
Balance: ___C₃H₈ + ___O₂ → ___CO₂ + ___H₂O
C₃H₈ + O₂ → CO₂ + H₂O
C₃H₈ + 4O₂ → 3CO₂ + 4H₂O
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
2C₃H₈ + 5O₂ → 6CO₂ + 8H₂O
Which law requires balancing chemical equations?
Law of Conservation of Energy
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Which of the following reactions is both synthesis and exothermic?
H₂ + Cl₂ → 2HCl
CaCO₃ → CaO + CO₂
Zn + HCl → ZnCl₂ + H₂
HCl + NaOH → NaCl + H₂O
Which type of bond is strongest?
Non-polar covalent
Polar covalent
Ionic
Triple covalent
Which of the following correctly classifies the reaction: AgNO₃ + NaCl → AgCl + NaNO₃
Single replacement
Double replacement
Combination
Decomposition
In the reaction: Fe + CuSO₄ → FeSO₄ + Cu What happens to Fe?
It is reduced.
It is oxidized.
It is neutralized.
It is decomposed.
