Combination Reactions

Chemistry ⇒ Chemical Reactions and Equations

Combination Reactions starts at 7 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Combination Reactions. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 9

Explain the difference between a combination reaction and a decomposition reaction.

Explain why combination reactions are important in everyday life.

Explain why the reaction between calcium oxide and water is important in the construction industry.

Explain why the reaction between iron and oxygen to form iron oxide is a combination reaction.

Explain why the reaction between sodium and chlorine to form sodium chloride is classified as a combination reaction.

Write the balanced chemical equation for the combination reaction between carbon and oxygen.

Write the balanced chemical equation for the combination reaction between hydrogen and chlorine.

Write the balanced chemical equation for the combination reaction between magnesium and oxygen.

Which of the following is a combination reaction? (1) 2H₂ + O₂ → 2H₂O (2) CaCO₃ → CaO + CO₂ (3) 2KClO₃ → 2KCl + 3O₂ (4) 2NaCl → 2Na + Cl₂

Which of the following is a combination reaction? (1) 2H₂O → 2H₂ + O₂ (2) 2Na + Cl₂ → 2NaCl (3) 2KClO₃ → 2KCl + 3O₂ (4) CaCO₃ → CaO + CO₂

Which of the following is a combination reaction? (1) 2K + 2H₂O → 2KOH + H₂ (2) 2H₂ + O₂ → 2H₂O (3) 2NaCl → 2Na + Cl₂ (4) CaCO₃ → CaO + CO₂

Which of the following is a combination reaction? (1) 2Na + 2H₂O → 2NaOH + H₂ (2) 2H₂ + O₂ → 2H₂O (3) 2KClO₃ → 2KCl + 3O₂ (4) CaCO₃ → CaO + CO₂

Fill in the blank: In a combination reaction, the number of products formed is usually ________.

Fill in the blank: The reaction 2Fe + 3Cl₂ → 2FeCl₃ is a ________ reaction.

Fill in the blank: The reaction 2Na + Cl₂ → 2NaCl is a ________ reaction.

Fill in the blank: The reaction between aluminum and chlorine to form aluminum chloride is a ________ reaction.

Is the reaction between calcium and oxygen to form calcium oxide a combination reaction?

Is the reaction between calcium oxide and water to form calcium hydroxide a combination reaction?

Is the reaction between carbon monoxide and oxygen to form carbon dioxide a combination reaction?

Is the reaction between hydrogen and oxygen to form hydrogen peroxide a combination reaction?