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10th Standard Science - Types of Chemical Reactions Model Question Paper Oct-12 , 2019

Types of Chemical Reactions 

10th Standard Science - Types of Chemical Reactions Model Question Paper

Types of Chemical Reactions Model Question Paper

10th Standard

    Reg.No. :
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Science

Time : 02:00:00 Hrs
Total Marks : 50
    6 x 1 = 6

  1. H2(g) + Cl29(g) → 2HCl(g) is a

    (a)

    Decomposition Reaction

    (b)

    Combination Reaction

    (c)

    Single Displacement Reaction

    (d)

    Double Displacement Reaction

  2. Photolysis is a decomposition reaction caused by __________

    (a)

    heat

    (b)

    electricity

    (c)

    light

    (d)

    mechanical energy

  3. A reaction between carbon and oxygen is represented by C(s) + O2(g) → CO2(g) + Heat. In which of the type(s), the above reaction can be classified?
    (i) Combination Reaction
    (ii) Combustion Reaction
    (iii) Decomposition Reaction
    (iv) Irreversible Reaction

    (a)

    i and ii

    (b)

    i and iv

    (c)

    i, ii and iii

    (d)

    i, ii and iv

  4. A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    iii and iv

    (d)

    i and iv

  5. Which of the following is not an “element + element → compound” type reaction?

    (a)

    C(s) + O2(g) → CO2(g)

    (b)

    2K(s) + Br2(l) → 2KBr(s)

    (c)

    2CO(g) + O2(g) → 2CO2(g)

    (d)

    4Fe(s) + 3O2(g) → 2Fe2O3(s)

  6. Powdered CaCO3 reacts more rapidly than flaky CaCO3 because of __________.

    (a)

    large surface area

    (b)

    high pressure

    (c)

    high concentration

    (d)

    high temperature

    7. 5 x 1 = 5

  7. A reaction between an acid and a base is called ____________

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    neutralization

  8. The equilibrium attained during the melting of ice is known as ___________.

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    physical equilibrium

  9. The value of ionic product of water at 250 C is _____________.

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    1.00 x 10-14 mol2cm-6

  10. The number of products formed in a synthesis reaction is _________

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    one

  11. The ion formed by dissolution of H+ in water is called _______________

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    Hydronium ion

    12. 5 x 1 = 5

  12. Quick lime

    13. (1)

    CaO

  13. Marble

    14. (2)

    CaCO3

  14. Lemon juice

    15. (3)

    10

  15. Milk of magnesia

    16. (4)

    2

  16. Combustion

    17. (5)

    exothermic
    6 x 2 = 12

  17. When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give the chemical equation of this reaction

  18. Define combination reaction. Give one example for an exothermic combination reaction.

  19. Differentiate reversible and irreversible reactions.

  20. Define rate of reaction.

  21. What is photolysis?

  22. What is LPG?

    23. 2 x 4 = 8

  23. What are called thermolysis reactions?

  24. What is a chemical equilibrium? What are its characteristics?

    25. 1 x 7 = 7

  25. A solid compound ‘A’ decomposes on heating into ‘B’ and a gas ‘C’. On passing the gas ‘C’ through water, it becomes acidic. Identify A, B and C.

    26. 1 x 7 = 7

  26. Calculate the pH of 0.001 molar solution of HCl.

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