Chemical Reactions and Equations MCQ Quiz

8 questions

1. Zn + H₂SO₄ → ZnSO₄ + H₂ is an example of which type of reaction?

   1. Combination
   2. Displacement
   3. Decomposition
   4. Double displacement

2. What is the correctly balanced form of: Fe + H₂O → Fe₃O₄ + H₂?

   1. 3Fe + 4H₂O → Fe₃O₄ + 4H₂
   2. Fe + H₂O → Fe₃O₄ + H₂
   3. 3Fe + 3H₂O → Fe₃O₄ + 3H₂
   4. 2Fe + 4H₂O → Fe₃O₄ + 4H₂

3. CaO + H₂O → Ca(OH)₂ is an example of which type of reaction?

   1. Decomposition
   2. Combination
   3. Displacement
   4. Double displacement

4. 2FeSO₄ → Fe₂O₃ + SO₂ + SO₃ (on heating) is an example of:

   1. Combination
   2. Thermal decomposition
   3. Displacement
   4. Double displacement

5. Which of the following is a double displacement reaction?

   1. Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl
   2. 2Mg + O₂ → 2MgO
   3. CaCO₃ → CaO + CO₂
   4. Zn + CuSO₄ → ZnSO₄ + Cu

6. Respiration in living organisms is an example of which type of reaction?

   1. Endothermic
   2. Exothermic
   3. Neutral
   4. Photochemical

7. The reaction 2AgCl → 2Ag + Cl₂ occurs only in sunlight. What type of decomposition is this?

   1. Thermal decomposition
   2. Photolytic decomposition
   3. Electrolytic decomposition
   4. Combination reaction

8. Which of the following defines an oxidation reaction?

   1. Gain of oxygen or loss of hydrogen
   2. Loss of oxygen or gain of hydrogen
   3. Gain of electrons only
   4. Loss of protons

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