Chemical Reaction

1 Marks Question

1. Write the types of given chemical equation.
2. C + O₂ ⟶ CO₂ = Combination
   2KClO₃ ⟶ 2KCl + 3O₂ = Decomposition
3. Calcium + Sulphuric acid ⟶ Calcium sulphate + Hydrogen. Mention its type of chemical reaction.
4. Its type of chemical reaction is displacement chemical reaction.
5. What is promoter? Give an example of it.
6. A promoter is a chemical substance added to a solid catalyst to improve its performance in a chemical reaction. For example: In Haber's process 'Mo' is used as a promoter.
7. What is combination reaction?
8. When two or more reactants combine to form a single product, such a chemical reaction is called a combination reaction.
9. Write the relation between concentration of reactants and the rate of reaction.
10. The rate of a chemical reaction is directly proportional to the concentration of the reactant i.e., the rate of reaction increases with an increase in the concentration of reactants.
11. Write a decomposition chemical reaction caused by light.
12. A decomposition chemical reaction caused by light is:
    2AgBr ⟶ 2Ag + Br₂
13. Define exothermic chemical reaction with an example.
14. A chemical reaction in which heat is released into the surrounding is called an exothermic reaction.

    For example: C + O₂ ⟶ CO₂ + Heat
    Cao + H₂O ⟶ Ca(OH)₂ + Heat

15. Define endothermic chemical reaction with an example.
16. A chemical reaction in which heat is absorbed from the surrounding is called endothermic reaction.

    For example,
    N₂ + O₂ + Heat ⟶ 2NO ↑
    CaCO₃ + Heat ⟶ CaO + CO₂ ↑

17. Write any two information obtained from balanced chemical equation.
18. Information obtained from balanced chemical equation are:
    
    1. Name of reactants and products and their molecular formula.
    2. Numbers of atoms or molecules of reactants and products.
19. Write a balanced chemical equation to show double displacement reaction.
20. NaCl + AgNO₃ ⟶ AgCl + NaNO₃
    Definition: The reaction in which two reacting compounds exchange their corresponding elements to form two new compound is called double displacement reaction.
21. Write any two method to increase rate of chemical reaction.
22. Methods to increase rate of chemical reaction are listed below:
    1. By using positive catalyst.
    2. By increasing temperature, making higher concentration which helps to make more collision.
23. Define single displacement reaction with an example.
24. The chemical reaction in which an element of a compound is replaced by another element to form new compound is called single displacement reaction.
    For example: Zn + H₂SO₄ ⟶ ZnSO₄ + H₂
25. What are the three main causative factors that bring about a chemical reaction?
26. Main causative factors that bring about a chemical reaction are:
    Simple contact
    Pressure
    Surface area
27. Write two limitation of balanced chemical equation.
28. Two limitation of balanced chemical equation are:
    
    1. It does not tell about the physical state of reactants and products.
    2. It does not state about the concentration of reactant's and product.
29. What is promoter? Give an example of it.
30. A promoter is a chemical substance added to a solid catalyst to improve its performance in a chemical reaction.
    For example: In Haber's process 'Mo' is used as a promoter.
31. Write the full form of IUPAC.
32. The full form of IUPAC is International Union of Pure and Applied Chemistry.